FACTANKER · measured, cited, anchored official records connected

Organization record

IMPERVA INC

All evidence-backed facts for this organization, identity resolved across official registers.

CIK: 0001364962Every fact source-linked

Cite: FACTANKER, https://factanker.com/entity/ceb0599b-ad2d-4fd3-81e0-4004b74887ce

Facts on record

Newest first; every row links to its evidence page.

FactValuePeriodSource
accounts_payable{"amount": 5372000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2018-09-30sec_edgar
accounts_payable{"amount": 5139000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2018-06-30sec_edgar
accounts_payable{"amount": 5514000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2018-03-31sec_edgar
accounts_payable{"amount": 5869000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2017-12-31sec_edgar
accounts_payable{"amount": 5330000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2017-09-30sec_edgar
accounts_payable{"amount": 6044000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2017-06-30sec_edgar
accounts_payable{"amount": 4047000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2017-03-31sec_edgar
accounts_payable{"amount": 5529000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2016-12-31sec_edgar
accounts_payable{"amount": 4559000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2016-09-30sec_edgar
accounts_payable{"amount": 6158000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2016-06-30sec_edgar
accounts_payable{"amount": 7772000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2016-03-31sec_edgar
accounts_payable{"amount": 6870000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2015-12-31sec_edgar
accounts_payable{"amount": 4544000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2015-09-30sec_edgar
accounts_payable{"amount": 3869000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2015-06-30sec_edgar
accounts_payable{"amount": 3733000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2015-03-31sec_edgar
accounts_payable{"amount": 5376000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2014-12-31sec_edgar
accounts_payable{"amount": 3461000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2014-09-30sec_edgar
accounts_payable{"amount": 3298000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2014-06-30sec_edgar
accounts_payable{"amount": 3634000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2014-03-31sec_edgar
accounts_payable{"amount": 3948000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2013-12-31sec_edgar
accounts_payable{"amount": 3055000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2013-09-30sec_edgar
accounts_payable{"amount": 3773000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2013-06-30sec_edgar
accounts_payable{"amount": 2783000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2013-03-31sec_edgar
accounts_payable{"amount": 3789000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2012-12-31sec_edgar
accounts_payable{"amount": 3730000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2012-09-30sec_edgar
accounts_payable{"amount": 2420000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2012-06-30sec_edgar
accounts_payable{"amount": 2420000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2012-03-31sec_edgar
accounts_payable{"amount": 3534000, "concept": "us-gaap:AccountsPayableCurrent", "currency": "USD"}2011-12-31sec_edgar
accounts_receivable{"amount": 68261000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2018-09-30sec_edgar
accounts_receivable{"amount": 70307000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2018-06-30sec_edgar
accounts_receivable{"amount": 59218000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2018-03-31sec_edgar
accounts_receivable{"amount": 75535000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2017-12-31sec_edgar
accounts_receivable{"amount": 59804000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2017-09-30sec_edgar
accounts_receivable{"amount": 59333000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2017-06-30sec_edgar
accounts_receivable{"amount": 44882000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2017-03-31sec_edgar
accounts_receivable{"amount": 62571000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2016-12-31sec_edgar
accounts_receivable{"amount": 45702000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2016-09-30sec_edgar
accounts_receivable{"amount": 43879000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2016-06-30sec_edgar
accounts_receivable{"amount": 43570000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2016-03-31sec_edgar
accounts_receivable{"amount": 61051000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2015-12-31sec_edgar
accounts_receivable{"amount": 41486000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2015-09-30sec_edgar
accounts_receivable{"amount": 40085000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2015-06-30sec_edgar
accounts_receivable{"amount": 33365000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2015-03-31sec_edgar
accounts_receivable{"amount": 47446000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2014-12-31sec_edgar
accounts_receivable{"amount": 35537000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2014-09-30sec_edgar
accounts_receivable{"amount": 33604000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2014-06-30sec_edgar
accounts_receivable{"amount": 28576000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2014-03-31sec_edgar
accounts_receivable{"amount": 44446000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2013-12-31sec_edgar
accounts_receivable{"amount": 36652000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2013-09-30sec_edgar
accounts_receivable{"amount": 27087000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2013-06-30sec_edgar
accounts_receivable{"amount": 24299000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2013-03-31sec_edgar
accounts_receivable{"amount": 35576000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2012-12-31sec_edgar
accounts_receivable{"amount": 26719000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2012-09-30sec_edgar
accounts_receivable{"amount": 23188000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2012-06-30sec_edgar
accounts_receivable{"amount": 19456000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2012-03-31sec_edgar
accounts_receivable{"amount": 25736000, "concept": "us-gaap:AccountsReceivableNetCurrent", "currency": "USD"}2011-12-31sec_edgar
capex{"amount": 5724000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2018-09-30sec_edgar
capex{"amount": 3443000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2018-06-30sec_edgar
capex{"amount": 2792000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2018-03-31sec_edgar
capex{"amount": 13924000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cur2017-12-31sec_edgar
capex{"amount": 9835000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2017-09-30sec_edgar
capex{"amount": 6546000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2017-06-30sec_edgar
capex{"amount": 1949000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2017-03-31sec_edgar
capex{"amount": 16789000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cur2016-12-31sec_edgar
capex{"amount": 13953000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "cur2016-09-30sec_edgar
capex{"amount": 8263000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2016-06-30sec_edgar
capex{"amount": 3426000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2016-03-31sec_edgar
capex{"amount": 8080000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2015-12-31sec_edgar
capex{"amount": 4038000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2015-09-30sec_edgar
capex{"amount": 2835000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2015-06-30sec_edgar
capex{"amount": 991000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre2015-03-31sec_edgar
capex{"amount": 5621000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2014-12-31sec_edgar
capex{"amount": 3694000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2014-09-30sec_edgar
capex{"amount": 2845000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2014-06-30sec_edgar
capex{"amount": 1718000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2014-03-31sec_edgar
capex{"amount": 2602000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2013-12-31sec_edgar
capex{"amount": 1753000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2013-09-30sec_edgar
capex{"amount": 1202000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2013-06-30sec_edgar
capex{"amount": 511000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre2013-03-31sec_edgar
capex{"amount": 3330000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2012-12-31sec_edgar
capex{"amount": 1758000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2012-09-30sec_edgar
capex{"amount": 885000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre2012-06-30sec_edgar
capex{"amount": 244000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre2012-03-31sec_edgar
capex{"amount": 1465000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2011-12-31sec_edgar
capex{"amount": 1036000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2011-09-30sec_edgar
capex{"amount": 709000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre2011-06-30sec_edgar
capex{"amount": 380000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curre2011-03-31sec_edgar
capex{"amount": 2889000, "concept": "us-gaap:PaymentsToAcquirePropertyPlantAndEquipment", "curr2010-12-31sec_edgar
cash_and_equivalents{"amount": 155932000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2018-09-30sec_edgar
cash_and_equivalents{"amount": 209194000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2018-06-30sec_edgar
cash_and_equivalents{"amount": 214274000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2018-03-31sec_edgar
cash_and_equivalents{"amount": 192538000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2017-12-31sec_edgar
cash_and_equivalents{"amount": 163935000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2017-09-30sec_edgar
cash_and_equivalents{"amount": 147427000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2017-06-30sec_edgar
cash_and_equivalents{"amount": 136318000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2017-03-31sec_edgar
cash_and_equivalents{"amount": 107343000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2016-12-31sec_edgar
cash_and_equivalents{"amount": 110017000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2016-09-30sec_edgar
cash_and_equivalents{"amount": 115732000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2016-06-30sec_edgar
cash_and_equivalents{"amount": 158691000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2016-03-31sec_edgar
cash_and_equivalents{"amount": 168252000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2015-12-31sec_edgar
cash_and_equivalents{"amount": 157949000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2015-09-30sec_edgar
cash_and_equivalents{"amount": 158569000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2015-06-30sec_edgar
cash_and_equivalents{"amount": 196486000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currenc2015-03-31sec_edgar
cash_and_equivalents{"amount": 68096000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2014-12-31sec_edgar
cash_and_equivalents{"amount": 65801000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2014-09-30sec_edgar
cash_and_equivalents{"amount": 62990000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2014-06-30sec_edgar
cash_and_equivalents{"amount": 70747000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2014-03-31sec_edgar
cash_and_equivalents{"amount": 76704000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2013-12-31sec_edgar
cash_and_equivalents{"amount": 70640000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2013-09-30sec_edgar
cash_and_equivalents{"amount": 70021000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2013-06-30sec_edgar
cash_and_equivalents{"amount": 66154000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2013-03-31sec_edgar
cash_and_equivalents{"amount": 59201000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2012-12-31sec_edgar
cash_and_equivalents{"amount": 56468000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2012-09-30sec_edgar
cash_and_equivalents{"amount": 59855000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2012-06-30sec_edgar
cash_and_equivalents{"amount": 64968000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2012-03-31sec_edgar
cash_and_equivalents{"amount": 96025000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2011-12-31sec_edgar
cash_and_equivalents{"amount": 13025000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2011-09-30sec_edgar
cash_and_equivalents{"amount": 14511000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2011-06-30sec_edgar
cash_and_equivalents{"amount": 17786000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2011-03-31sec_edgar
cash_and_equivalents{"amount": 16410000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2010-12-31sec_edgar
cash_and_equivalents{"amount": 18587000, "concept": "us-gaap:CashAndCashEquivalentsAtCarryingValue", "currency2009-12-31sec_edgar
cash_and_restricted_cash{"amount": 216657000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCa2018-03-31sec_edgar
cash_and_restricted_cash{"amount": 194874000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCa2017-12-31sec_edgar
cash_and_restricted_cash{"amount": 138288000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCa2017-03-31sec_edgar
cash_and_restricted_cash{"amount": 109295000, "concept": "us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCa2016-12-31sec_edgar
cashflow_financing{"amount": 1648000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2018-09-30sec_edgar
cashflow_financing{"amount": 3242000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2018-06-30sec_edgar
cashflow_financing{"amount": 6573000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2017-09-30sec_edgar
cashflow_financing{"amount": 5104000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2017-06-30sec_edgar
cashflow_financing{"amount": 6316000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2013-12-31sec_edgar
cashflow_financing{"amount": 4674000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2013-09-30sec_edgar
cashflow_financing{"amount": 2893000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2013-06-30sec_edgar
cashflow_financing{"amount": 628000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curre2013-03-31sec_edgar
cashflow_financing{"amount": 4230000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2012-12-31sec_edgar
cashflow_financing{"amount": 2140000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2012-09-30sec_edgar
cashflow_financing{"amount": 1087000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2012-06-30sec_edgar
cashflow_financing{"amount": 103000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curre2012-03-31sec_edgar
cashflow_financing{"amount": 87856000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "cur2011-12-31sec_edgar
cashflow_financing{"amount": 1202000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2011-09-30sec_edgar
cashflow_financing{"amount": 3000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "currenc2011-06-30sec_edgar
cashflow_financing{"amount": -221000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2011-03-31sec_edgar
cashflow_financing{"amount": 3274000, "concept": "us-gaap:NetCashProvidedByUsedInFinancingActivities", "curr2010-12-31sec_edgar
cashflow_investing{"amount": -105834000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "c2018-09-30sec_edgar
cashflow_investing{"amount": -22087000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu2018-06-30sec_edgar
cashflow_investing{"amount": -235000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "curr2017-09-30sec_edgar
cashflow_investing{"amount": 9941000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "curr2017-06-30sec_edgar
cashflow_investing{"amount": 1597000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "curr2013-12-31sec_edgar
cashflow_investing{"amount": 4721000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "curr2013-09-30sec_edgar
cashflow_investing{"amount": 1192000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "curr2013-06-30sec_edgar
cashflow_investing{"amount": -1285000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cur2013-03-31sec_edgar
cashflow_investing{"amount": -45574000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu2012-12-31sec_edgar
cashflow_investing{"amount": -45878000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu2012-09-30sec_edgar
cashflow_investing{"amount": -40082000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu2012-06-30sec_edgar
cashflow_investing{"amount": -34422000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cu2012-03-31sec_edgar
cashflow_investing{"amount": -1642000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cur2011-12-31sec_edgar
cashflow_investing{"amount": 401000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "curre2011-09-30sec_edgar
cashflow_investing{"amount": 882000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "curre2011-06-30sec_edgar
cashflow_investing{"amount": 484000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "curre2011-03-31sec_edgar
cashflow_investing{"amount": -4573000, "concept": "us-gaap:NetCashProvidedByUsedInInvestingActivities", "cur2010-12-31sec_edgar
cashflow_operating{"amount": 68575000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur2018-09-30sec_edgar
cashflow_operating{"amount": 36328000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur2018-06-30sec_edgar
cashflow_operating{"amount": 22502000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinu2018-03-31sec_edgar
cashflow_operating{"amount": 67156000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinu2017-12-31sec_edgar
cashflow_operating{"amount": 49466000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur2017-09-30sec_edgar
cashflow_operating{"amount": 23938000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur2017-06-30sec_edgar
cashflow_operating{"amount": 18496000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinu2017-03-31sec_edgar
cashflow_operating{"amount": 22494000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinu2016-12-31sec_edgar
cashflow_operating{"amount": 13642000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinu2016-09-30sec_edgar
cashflow_operating{"amount": 3794000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2016-06-30sec_edgar
cashflow_operating{"amount": 5982000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2016-03-31sec_edgar
cashflow_operating{"amount": 23867000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinu2015-12-31sec_edgar
cashflow_operating{"amount": 15188000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinu2015-09-30sec_edgar
cashflow_operating{"amount": 4647000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2015-06-30sec_edgar
cashflow_operating{"amount": 6804000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2015-03-31sec_edgar
cashflow_operating{"amount": 4126000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2014-12-31sec_edgar
cashflow_operating{"amount": -1087000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinu2014-09-30sec_edgar
cashflow_operating{"amount": -3633000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinu2014-06-30sec_edgar
cashflow_operating{"amount": 3176000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2014-03-31sec_edgar
cashflow_operating{"amount": 9797000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2013-12-31sec_edgar
cashflow_operating{"amount": 2249000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2013-09-30sec_edgar
cashflow_operating{"amount": 6897000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2013-06-30sec_edgar
cashflow_operating{"amount": 7693000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2013-03-31sec_edgar
cashflow_operating{"amount": 4467000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivitiesContinui2012-12-31sec_edgar
cashflow_operating{"amount": 4141000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "curr2012-09-30sec_edgar
cashflow_operating{"amount": 2857000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "curr2012-06-30sec_edgar
cashflow_operating{"amount": 3299000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "curr2012-03-31sec_edgar
cashflow_operating{"amount": -6537000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur2011-12-31sec_edgar
cashflow_operating{"amount": -5056000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur2011-09-30sec_edgar
cashflow_operating{"amount": -2896000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur2011-06-30sec_edgar
cashflow_operating{"amount": 1094000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "curr2011-03-31sec_edgar
cashflow_operating{"amount": -1049000, "concept": "us-gaap:NetCashProvidedByUsedInOperatingActivities", "cur2010-12-31sec_edgar
common_shares_issued{"unit": "shares", "value": 35151159, "concept": "us-gaap:CommonStockSharesIssued"}2018-09-30sec_edgar
common_shares_issued{"unit": "shares", "value": 34956475, "concept": "us-gaap:CommonStockSharesIssued"}2018-06-30sec_edgar
common_shares_issued{"unit": "shares", "value": 34733955, "concept": "us-gaap:CommonStockSharesIssued"}2018-03-31sec_edgar
common_shares_issued{"unit": "shares", "value": 34233888, "concept": "us-gaap:CommonStockSharesIssued"}2017-12-31sec_edgar
common_shares_issued{"unit": "shares", "value": 34013340, "concept": "us-gaap:CommonStockSharesIssued"}2017-09-30sec_edgar
common_shares_issued{"unit": "shares", "value": 33813897, "concept": "us-gaap:CommonStockSharesIssued"}2017-06-30sec_edgar
common_shares_issued{"unit": "shares", "value": 33454542, "concept": "us-gaap:CommonStockSharesIssued"}2017-03-31sec_edgar
common_shares_issued{"unit": "shares", "value": 33088990, "concept": "us-gaap:CommonStockSharesIssued"}2016-12-31sec_edgar
common_shares_issued{"unit": "shares", "value": 32833666, "concept": "us-gaap:CommonStockSharesIssued"}2016-09-30sec_edgar