Organization record
ISHARES DIVERSIFIED ALTERNATIVES TRUST
All evidence-backed facts for this organization, identity resolved across official registers.
Facts on record
Newest first; every row links to its evidence page.
| Fact | Value | Period | Source |
|---|---|---|---|
| cash_and_equivalents | {"amount": 1201722, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2013-03-31 | sec_edgar |
| cash_and_equivalents | {"amount": 2046676, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2012-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 2188342, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2012-09-30 | sec_edgar |
| cash_and_equivalents | {"amount": 2935642, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2012-06-30 | sec_edgar |
| cash_and_equivalents | {"amount": 2172089, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2012-03-31 | sec_edgar |
| cash_and_equivalents | {"amount": 3686978, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2011-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 7108869, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2011-09-30 | sec_edgar |
| cash_and_equivalents | {"amount": 3836746, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2011-06-30 | sec_edgar |
| cash_and_equivalents | {"amount": 4040367, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2011-03-31 | sec_edgar |
| cash_and_equivalents | {"amount": 3309973, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2010-12-31 | sec_edgar |
| cash_and_equivalents | {"amount": 1956302, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency" | 2010-09-30 | sec_edgar |
| cash_and_equivalents | {"amount": 206951, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency": | 2010-06-30 | sec_edgar |
| cash_and_equivalents | {"amount": 166599, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency": | 2009-12-31 | sec_edgar |
| cashflow_financing | {"amount": -39300677, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2012-12-31 | sec_edgar |
| cashflow_financing | {"amount": -24325817, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2012-09-30 | sec_edgar |
| cashflow_financing | {"amount": -24425370, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2012-06-30 | sec_edgar |
| cashflow_financing | {"amount": -24425370, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2012-03-31 | sec_edgar |
| cashflow_financing | {"amount": -18802864, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cu | 2011-12-31 | sec_edgar |
| cashflow_financing | {"amount": 20495841, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2011-09-30 | sec_edgar |
| cashflow_financing | {"amount": 15434636, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2011-06-30 | sec_edgar |
| cashflow_financing | {"amount": 15357021, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2011-03-31 | sec_edgar |
| cashflow_financing | {"amount": 94893939, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2010-12-31 | sec_edgar |
| cashflow_financing | {"amount": 79665478, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2010-09-30 | sec_edgar |
| cashflow_financing | {"amount": 54760301, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2010-06-30 | sec_edgar |
| cashflow_financing | {"amount": 15027200, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur | 2009-12-31 | sec_edgar |
| cashflow_operating | {"amount": -424372, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "curr | 2013-03-31 | sec_edgar |
| cashflow_operating | {"amount": 37211527, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur | 2012-12-31 | sec_edgar |
| cashflow_operating | {"amount": 22361729, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur | 2012-09-30 | sec_edgar |
| cashflow_operating | {"amount": 23659180, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur | 2012-06-30 | sec_edgar |
| cashflow_operating | {"amount": 21765028, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur | 2012-03-31 | sec_edgar |
| cashflow_operating | {"amount": 20107889, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur | 2011-12-31 | sec_edgar |
| cashflow_operating | {"amount": -19807183, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2011-09-30 | sec_edgar |
| cashflow_operating | {"amount": -15656548, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2011-06-30 | sec_edgar |
| cashflow_operating | {"amount": -13247445, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2011-03-31 | sec_edgar |
| cashflow_operating | {"amount": -91835272, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2010-12-31 | sec_edgar |
| cashflow_operating | {"amount": -77401502, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2010-09-30 | sec_edgar |
| cashflow_operating | {"amount": -55179768, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2010-06-30 | sec_edgar |
| cashflow_operating | {"amount": -14817027, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cu | 2009-12-31 | sec_edgar |
| common_shares_issued | {"unit": "shares", "value": 1800000, "concept": "us-gaap:CommonStockSharesIssued"} | 2011-12-31 | sec_edgar |
| common_shares_issued | {"unit": "shares", "value": 2600000, "concept": "us-gaap:CommonStockSharesIssued"} | 2011-09-30 | sec_edgar |
| common_shares_issued | {"unit": "shares", "value": 2200000, "concept": "us-gaap:CommonStockSharesIssued"} | 2010-12-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 1100000, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2013-03-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 1000000, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2012-12-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 1300000, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2012-09-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 1200000, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2012-06-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 1300000, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2012-03-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 1800000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2011-12-31 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 2600000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2011-09-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 2500000, "concept": "dei:EntityCommonStockSharesOutstanding"} | 2011-06-30 | sec_edgar |
| common_shares_outstanding | {"unit": "shares", "value": 2200000, "concept": "us-gaap:CommonStockSharesOutstanding"} | 2010-12-31 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 1100000} | 2013-03-31 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 1000000} | 2012-12-31 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 1300000} | 2012-09-30 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 1200000} | 2012-06-30 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 1300000} | 2012-03-31 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 1800000} | 2011-12-31 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 2600000} | 2011-09-30 | sec_edgar |
| dei:EntityCommonStockSharesOutstanding | {"unit": "shares", "value": 2500000} | 2011-06-30 | sec_edgar |
| dei:EntityPublicFloat | {"amount": 58284000, "currency": "USD"} | 2012-06-30 | sec_edgar |
| dei:EntityPublicFloat | {"amount": 129849750, "currency": "USD"} | 2011-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.71, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2013-03-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.72, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2012-12-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.14, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2012-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.83, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2012-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -0.16, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2012-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -0.19, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2012-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -0.04, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2012-03-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -1.78, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2011-12-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -1.72, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2011-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -2.77, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2011-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.77, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2011-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.25, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2011-06-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.48, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2011-03-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.88, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2010-12-31 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 1.19, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2010-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": 0.81, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2010-09-30 | sec_edgar |
| eps_basic | {"per": "shares", "amount": -0.74, "concept": "us-gaap:EarningsPerShareBasic", "currency": | 2009-12-31 | sec_edgar |
| industry_sic | {"code": "6221", "scheme": "SIC", "description": "Commodity Contracts Brokers & Dealers"} | sec_edgar | |
| net_income | {"amount": 711732, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2013-03-31 | sec_edgar |
| net_income | {"amount": 2234254, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2012-12-31 | sec_edgar |
| net_income | {"amount": 1120325, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2012-09-30 | sec_edgar |
| net_income | {"amount": 1386647, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2012-09-30 | sec_edgar |
| net_income | {"amount": -210362, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2012-06-30 | sec_edgar |
| net_income | {"amount": -266322, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2012-06-30 | sec_edgar |
| net_income | {"amount": -55960, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2012-03-31 | sec_edgar |
| net_income | {"amount": -4241958, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2011-12-31 | sec_edgar |
| net_income | {"amount": -4194585, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2011-09-30 | sec_edgar |
| net_income | {"amount": -7153683, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2011-09-30 | sec_edgar |
| net_income | {"amount": 1868423, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2011-06-30 | sec_edgar |
| net_income | {"amount": 2959098, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2011-06-30 | sec_edgar |
| net_income | {"amount": 1090675, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2011-03-31 | sec_edgar |
| net_income | {"amount": 1189545, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2010-12-31 | sec_edgar |
| net_income | {"amount": 1326906, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2010-09-30 | sec_edgar |
| net_income | {"amount": 1307390, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2010-09-30 | sec_edgar |
| net_income | {"amount": -19516, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2010-06-30 | sec_edgar |
| net_income | {"amount": 27671, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2010-06-30 | sec_edgar |
| net_income | {"amount": -172003, "concept": "us-gaap:NetIncomeLoss", "currency": "USD"} | 2009-12-31 | sec_edgar |
| operating_expenses | {"amount": 132994, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2013-03-31 | sec_edgar |
| operating_expenses | {"amount": 668781, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2012-12-31 | sec_edgar |
| operating_expenses | {"amount": 159944, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2012-09-30 | sec_edgar |
| operating_expenses | {"amount": 526002, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2012-09-30 | sec_edgar |
| operating_expenses | {"amount": 166031, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2012-06-30 | sec_edgar |
| operating_expenses | {"amount": 366058, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2012-06-30 | sec_edgar |
| operating_expenses | {"amount": 200027, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2012-03-31 | sec_edgar |
| operating_expenses | {"amount": 1233413, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2011-12-31 | sec_edgar |
| operating_expenses | {"amount": 939206, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2011-09-30 | sec_edgar |
| operating_expenses | {"amount": 333577, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2011-09-30 | sec_edgar |
| operating_expenses | {"amount": 605629, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2011-06-30 | sec_edgar |
| operating_expenses | {"amount": 314770, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2011-06-30 | sec_edgar |
| operating_expenses | {"amount": 290859, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2011-03-31 | sec_edgar |
| operating_expenses | {"amount": 675872, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2010-12-31 | sec_edgar |
| operating_expenses | {"amount": 408995, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2010-09-30 | sec_edgar |
| operating_expenses | {"amount": 208034, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2010-09-30 | sec_edgar |
| operating_expenses | {"amount": 200961, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2010-06-30 | sec_edgar |
| operating_expenses | {"amount": 137051, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2010-06-30 | sec_edgar |
| operating_expenses | {"amount": 27952, "concept": "us-gaap:CostsAndExpenses", "currency": "USD"} | 2009-12-31 | sec_edgar |
| operating_income | {"amount": -118931, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2013-03-31 | sec_edgar |
| operating_income | {"amount": -597313, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2012-12-31 | sec_edgar |
| operating_income | {"amount": -139143, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2012-09-30 | sec_edgar |
| operating_income | {"amount": -473299, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2012-09-30 | sec_edgar |
| operating_income | {"amount": -146671, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2012-06-30 | sec_edgar |
| operating_income | {"amount": -334156, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2012-06-30 | sec_edgar |
| operating_income | {"amount": -187485, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2012-03-31 | sec_edgar |
| operating_income | {"amount": -1108231, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2011-12-31 | sec_edgar |
| operating_income | {"amount": -312281, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2011-09-30 | sec_edgar |
| operating_income | {"amount": -831695, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2011-09-30 | sec_edgar |
| operating_income | {"amount": -519414, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2011-06-30 | sec_edgar |
| operating_income | {"amount": -273735, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2011-06-30 | sec_edgar |
| operating_income | {"amount": -245679, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2011-03-31 | sec_edgar |
| operating_income | {"amount": -564823, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2010-12-31 | sec_edgar |
| operating_income | {"amount": -174084, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2010-09-30 | sec_edgar |
| operating_income | {"amount": -344850, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2010-09-30 | sec_edgar |
| operating_income | {"amount": -170766, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2010-06-30 | sec_edgar |
| operating_income | {"amount": -113791, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2010-06-30 | sec_edgar |
| operating_income | {"amount": -25508, "concept": "us-gaap:OperatingIncomeLoss", "currency": "USD"} | 2009-12-31 | sec_edgar |
| revenue | {"amount": 14063, "concept": "us-gaap:Revenues", "currency": "USD"} | 2013-03-31 | sec_edgar |
| revenue | {"amount": 71468, "concept": "us-gaap:Revenues", "currency": "USD"} | 2012-12-31 | sec_edgar |
| revenue | {"amount": 20801, "concept": "us-gaap:Revenues", "currency": "USD"} | 2012-09-30 | sec_edgar |
| revenue | {"amount": 52703, "concept": "us-gaap:Revenues", "currency": "USD"} | 2012-09-30 | sec_edgar |
| revenue | {"amount": 31902, "concept": "us-gaap:Revenues", "currency": "USD"} | 2012-06-30 | sec_edgar |
| revenue | {"amount": 19360, "concept": "us-gaap:Revenues", "currency": "USD"} | 2012-06-30 | sec_edgar |
| revenue | {"amount": 12542, "concept": "us-gaap:Revenues", "currency": "USD"} | 2012-03-31 | sec_edgar |
| revenue | {"amount": 125182, "concept": "us-gaap:Revenues", "currency": "USD"} | 2011-12-31 | sec_edgar |
| revenue | {"amount": 107511, "concept": "us-gaap:Revenues", "currency": "USD"} | 2011-09-30 | sec_edgar |
| revenue | {"amount": 21296, "concept": "us-gaap:Revenues", "currency": "USD"} | 2011-09-30 | sec_edgar |
| revenue | {"amount": 41035, "concept": "us-gaap:Revenues", "currency": "USD"} | 2011-06-30 | sec_edgar |
| revenue | {"amount": 86215, "concept": "us-gaap:Revenues", "currency": "USD"} | 2011-06-30 | sec_edgar |
| revenue | {"amount": 45180, "concept": "us-gaap:Revenues", "currency": "USD"} | 2011-03-31 | sec_edgar |
| revenue | {"amount": 111049, "concept": "us-gaap:Revenues", "currency": "USD"} | 2010-12-31 | sec_edgar |
| revenue | {"amount": 33950, "concept": "us-gaap:Revenues", "currency": "USD"} | 2010-09-30 | sec_edgar |
| revenue | {"amount": 64145, "concept": "us-gaap:Revenues", "currency": "USD"} | 2010-09-30 | sec_edgar |
| revenue | {"amount": 30195, "concept": "us-gaap:Revenues", "currency": "USD"} | 2010-06-30 | sec_edgar |
| revenue | {"amount": 23260, "concept": "us-gaap:Revenues", "currency": "USD"} | 2010-06-30 | sec_edgar |
| revenue | {"amount": 2444, "concept": "us-gaap:Revenues", "currency": "USD"} | 2009-12-31 | sec_edgar |
| share_repurchase | {"amount": 59383876, "concept": "us-gaap:PaymentsForRepurchaseOfCommonStock", "currency": | 2011-12-31 | sec_edgar |
| share_repurchase | {"amount": 15188945, "concept": "us-gaap:PaymentsForRepurchaseOfCommonStock", "currency": | 2011-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 1004444, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2013-03-31 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 1296995, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2012-12-31 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 1356934, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2012-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 1218478, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2012-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 1423626, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2012-06-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 1296703, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2012-06-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 1550549, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2012-03-31 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 2388493, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2011-12-31 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 2435897, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2011-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 2578348, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2011-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 2434066, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2011-06-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 2361326, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2011-06-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 2287778, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2011-03-31 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 1346575, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2010-12-31 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 1644565, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2010-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 1094872, "concept": "us-gaap:WeightedAverageNumberOfSharesOuts | 2010-09-30 | sec_edgar |
| shares_wavg_basic | {"unit": "shares", "value": 232184, "concept": "us-gaap:WeightedAverageNumberOfSharesOutst | 2009-12-31 | sec_edgar |
| short_term_investments | {"amount": 114278019, "concept": "us-gaap:ShortTermInvestments", "currency": "USD"} | 2011-06-30 | sec_edgar |
| short_term_investments | {"amount": 100261940, "concept": "us-gaap:ShortTermInvestments", "currency": "USD"} | 2010-12-31 | sec_edgar |
| stockholders_equity | {"amount": 87893859, "concept": "us-gaap:StockholdersEquity", "currency": "USD"} | 2011-12-31 | sec_edgar |
| stockholders_equity | {"amount": 127239937, "concept": "us-gaap:StockholdersEquity", "currency": "USD"} | 2011-09-30 | sec_edgar |
| stockholders_equity | {"amount": 129332415, "concept": "us-gaap:StockholdersEquity", "currency": "USD"} | 2011-06-30 | sec_edgar |
| stockholders_equity | {"amount": 110938681, "concept": "us-gaap:StockholdersEquity", "currency": "USD"} | 2010-12-31 | sec_edgar |
| stockholders_equity | {"amount": 14855197, "concept": "us-gaap:StockholdersEquity", "currency": "USD"} | 2009-12-31 | sec_edgar |
| total_assets | {"amount": 58440306, "concept": "us-gaap:Assets", "currency": "USD"} | 2013-03-31 | sec_edgar |
| total_assets | {"amount": 52352442, "concept": "us-gaap:Assets", "currency": "USD"} | 2012-12-31 | sec_edgar |
| total_assets | {"amount": 66281547, "concept": "us-gaap:Assets", "currency": "USD"} | 2012-09-30 | sec_edgar |
| total_assets | {"amount": 65635272, "concept": "us-gaap:Assets", "currency": "USD"} | 2012-06-30 | sec_edgar |
| total_assets | {"amount": 66208909, "concept": "us-gaap:Assets", "currency": "USD"} | 2012-03-31 | sec_edgar |
| total_assets | {"amount": 90763622, "concept": "us-gaap:Assets", "currency": "USD"} | 2011-12-31 | sec_edgar |
| total_assets | {"amount": 137407782, "concept": "us-gaap:Assets", "currency": "USD"} | 2011-09-30 | sec_edgar |
| total_assets | {"amount": 132259102, "concept": "us-gaap:Assets", "currency": "USD"} | 2011-06-30 | sec_edgar |
| total_assets | {"amount": 114772732, "concept": "us-gaap:Assets", "currency": "USD"} | 2010-12-31 | sec_edgar |
| total_liabilities | {"amount": 1746329, "concept": "us-gaap:Liabilities", "currency": "USD"} | 2013-03-31 | sec_edgar |
| total_liabilities | {"amount": 1525006, "concept": "us-gaap:Liabilities", "currency": "USD"} | 2012-12-31 | sec_edgar |
| total_liabilities | {"amount": 1593180, "concept": "us-gaap:Liabilities", "currency": "USD"} | 2012-09-30 | sec_edgar |
| total_liabilities | {"amount": 7294437, "concept": "us-gaap:Liabilities", "currency": "USD"} | 2012-06-30 | sec_edgar |
| total_liabilities | {"amount": 2796380, "concept": "us-gaap:Liabilities", "currency": "USD"} | 2012-03-31 | sec_edgar |
| total_liabilities | {"amount": 2869763, "concept": "us-gaap:Liabilities", "currency": "USD"} | 2011-12-31 | sec_edgar |
| total_liabilities | {"amount": 10167845, "concept": "us-gaap:Liabilities", "currency": "USD"} | 2011-09-30 | sec_edgar |
| total_liabilities | {"amount": 2926687, "concept": "us-gaap:Liabilities", "currency": "USD"} | 2011-06-30 | sec_edgar |
| total_liabilities | {"amount": 3834051, "concept": "us-gaap:Liabilities", "currency": "USD"} | 2010-12-31 | sec_edgar |
| total_liabilities_and_equity | {"amount": 58440306, "concept": "us-gaap:LiabilitiesAndStockholdersEquity", "currency": "U | 2013-03-31 | sec_edgar |
| total_liabilities_and_equity | {"amount": 52352442, "concept": "us-gaap:LiabilitiesAndStockholdersEquity", "currency": "U | 2012-12-31 | sec_edgar |