Annual report pursuant to Section 13 and 15(d)

Quarterly Financial Information (Unaudited) (Details)

v2.4.1.9
Quarterly Financial Information (Unaudited) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]                      
Net Revenue $ 135,862us-gaap_SalesRevenueServicesNet $ 136,027us-gaap_SalesRevenueServicesNet $ 134,696us-gaap_SalesRevenueServicesNet $ 132,864us-gaap_SalesRevenueServicesNet $ 132,758us-gaap_SalesRevenueServicesNet $ 115,844us-gaap_SalesRevenueServicesNet $ 102,273us-gaap_SalesRevenueServicesNet $ 100,158us-gaap_SalesRevenueServicesNet $ 539,449us-gaap_SalesRevenueServicesNet $ 451,033us-gaap_SalesRevenueServicesNet $ 344,953us-gaap_SalesRevenueServicesNet
Operating income 23,583us-gaap_OperatingIncomeLoss 23,989us-gaap_OperatingIncomeLoss 22,826us-gaap_OperatingIncomeLoss 23,092us-gaap_OperatingIncomeLoss 20,777us-gaap_OperatingIncomeLoss 17,663us-gaap_OperatingIncomeLoss 20,849us-gaap_OperatingIncomeLoss 23,250us-gaap_OperatingIncomeLoss 93,490us-gaap_OperatingIncomeLoss 82,539us-gaap_OperatingIncomeLoss 66,167us-gaap_OperatingIncomeLoss
Net income (loss) $ (5,009)us-gaap_IncomeLossFromContinuingOperations $ (8,332)us-gaap_IncomeLossFromContinuingOperations $ (8,525)us-gaap_IncomeLossFromContinuingOperations $ (7,851)us-gaap_IncomeLossFromContinuingOperations $ (14,141)us-gaap_IncomeLossFromContinuingOperations $ (4,487)us-gaap_IncomeLossFromContinuingOperations $ 592us-gaap_IncomeLossFromContinuingOperations $ 1,349us-gaap_IncomeLossFromContinuingOperations