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arrangement.","units":{"USD":[{"start":"2016-01-01","end":"2016-03-31","val":91000,"accn":"0001029730-16-000025","fy":2016,"fp":"Q1","form":"10-Q","filed":"2016-05-06","frame":"CY2016Q1"},{"start":"2016-01-01","end":"2016-06-30","val":1188000,"accn":"0001029730-16-000029","fy":2016,"fp":"Q2","form":"10-Q","filed":"2016-08-05"},{"start":"2016-01-01","end":"2016-09-30","val":2039000,"accn":"0001029730-16-000034","fy":2016,"fp":"Q3","form":"10-Q","filed":"2016-11-07"},{"start":"2016-01-01","end":"2016-12-31","val":2038000,"accn":"0001029730-17-000005","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16"},{"start":"2016-01-01","end":"2016-12-31","val":2038000,"accn":"0001029730-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16"},{"start":"2016-01-01","end":"2016-12-31","val":2038000,"accn":"0001029730-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-15","frame":"CY2016"}]}},"AdjustmentsToAdditionalPaidInCapitalOther":{"label":"Adjustments to Additional Paid in Capital, Other","description":"Amount of other increase (decrease) in additional paid in capital (APIC).","units":{"USD":[{"start":"2011-01-01","end":"2011-12-31","val":60000,"accn":"0001144204-12-014995","fy":2011,"fp":"FY","form":"10-K","filed":"2012-03-15"},{"start":"2011-01-01","end":"2011-12-31","val":60000,"accn":"0001144204-13-015520","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-18"},{"start":"2011-01-01","end":"2011-12-31","val":60000,"accn":"0001445305-14-001017","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-13","frame":"CY2011"},{"start":"2017-01-01","end":"2017-03-31","val":-28000,"accn":"0001029730-17-000015","fy":2017,"fp":"Q1","form":"10-Q","filed":"2017-05-09","frame":"CY2017Q1"}]}},"AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts":{"label":"Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs","description":"Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. 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(Decrease) in Financial Instruments Sold, Not yet Purchased","description":"\"The increase (decrease) during the reporting period in the liability Securities Sold, Not yet Purchased. Proprietary securities transactions entered into by the broker-dealer for trading or investment purposes are included in \"\"Securities Owned and Securities Sold, Not Yet Purchased.\"\" Although proprietary trading is frequently thought of as purchasing securities for sale to others, trading securities for the broker-dealer's own account sometimes leads to a liability for the fair value of securities sold but not yet purchased, that is, sold short. The broker-dealer is then obliged to purchase the securities at a future date at the then-current market 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ements":{"label":"Incremental 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Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2013-03-31","val":599000,"accn":"0001445305-14-001017","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-13"},{"end":"2013-03-31","val":599000,"accn":"0001029730-16-000020","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2013Q1I"},{"end":"2013-12-31","val":457000,"accn":"0001445305-14-001017","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-13","frame":"CY2013Q4I"},{"end":"2014-12-31","val":1095000,"accn":"0001029730-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-17","frame":"CY2014Q4I"},{"end":"2015-12-31","val":1776000,"accn":"0001029730-16-000020","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2015Q4I"},{"end":"2016-12-31","val":3950000,"accn":"0001029730-17-000005","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2016Q4I"},{"end":"2017-12-31","val":6297000,"accn":"0001029730-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16","frame":"CY2017Q4I"},{"end":"2018-12-31","val":5423000,"accn":"0001029730-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-15","frame":"CY2018Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsDueInFourYears":{"label":"Operating Leases, Future Minimum Payments, Due in Four Years","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.","units":{"USD":[{"end":"2013-03-31","val":599000,"accn":"0001445305-14-001017","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-13"},{"end":"2013-03-31","val":599000,"accn":"0001029730-16-000020","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2013Q1I"},{"end":"2013-12-31","val":3927000,"accn":"0001445305-14-001017","fy":2013,"fp":"FY","form":"10-K","filed":"2014-03-13","frame":"CY2013Q4I"},{"end":"2014-12-31","val":1726000,"accn":"0001029730-15-000004","fy":2014,"fp":"FY","form":"10-K","filed":"2015-03-17","frame":"CY2014Q4I"},{"end":"2015-12-31","val":2642000,"accn":"0001029730-16-000020","fy":2015,"fp":"FY","form":"10-K","filed":"2016-03-15","frame":"CY2015Q4I"},{"end":"2016-12-31","val":5725000,"accn":"0001029730-17-000005","fy":2016,"fp":"FY","form":"10-K","filed":"2017-03-16","frame":"CY2016Q4I"},{"end":"2017-12-31","val":6808000,"accn":"0001029730-18-000002","fy":2017,"fp":"FY","form":"10-K","filed":"2018-03-16","frame":"CY2017Q4I"},{"end":"2018-12-31","val":6558000,"accn":"0001029730-19-000004","fy":2018,"fp":"FY","form":"10-K","filed":"2019-03-15","frame":"CY2018Q4I"}]}},"OperatingLeasesFutureMinimumPaymentsDueInThreeYears":{"label":"Operating Leases, Future Minimum Payments, Due in Three Years","description":"Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the third fiscal year following the latest fiscal year. 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taxes.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":30379000,"accn":"0001144204-13-015520","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-18","frame":"CY2012"}]}},"OperatingLeasesRentExpenseNet":{"label":"Operating Leases, Rent Expense, Net","description":"Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.","units":{"USD":[{"start":"2012-01-01","end":"2012-12-31","val":18640000,"accn":"0001144204-13-015520","fy":2012,"fp":"FY","form":"10-K","filed":"2013-03-18","frame":"CY2012"}]}},"OperatingLeasesRentExpenseSubleaseRentals1":{"label":"Operating Leases, Rent Expense, Sublease Rentals","description":"The total amount of sublease rental income recognized during the period that reduces the entity's rent expense incurred under operating 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Amount excludes temporary equity. 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Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. 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