Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Information
Total revenues	$ 197,944	$ 214,646	$ 399,949	$ 432,657
Operating income (loss) from continuing operations before amortization and restructuring charges	3,675	(837)	9,672	6,094
Amortization of intangible assets	(107)	(67)	(107)	(67)
Restructuring charges	(675)	(1,508)	(736)	(1,406)
OPERATING INCOME (LOSS) FROM CONTINUING OPERATIONS	2,893	(2,412)	8,829	4,621
Operating segment | International
Segment Information
Total revenues	89,295	109,830	185,982	224,811
Operating income (loss) from continuing operations before amortization and restructuring charges	5,225	3,231	11,638	10,055
Operating segment | North America
Segment Information
Total revenues	108,825	105,154	214,392	208,632
Operating income (loss) from continuing operations before amortization and restructuring charges	10,387	9,109	20,383	17,581
Operating segment | Other
Segment Information
Total revenues	833	567	1,621	1,221
Operating income (loss) from continuing operations before amortization and restructuring charges	49	(4)	125	133
Inter-segment
Segment Information
Total revenues	(1,009)	(905)	(2,046)	(2,007)
Corporate expenses
Segment Information
Operating income (loss) from continuing operations before amortization and restructuring charges	(11,986)	(13,173)	(22,474)	(21,675)
Segment reconciling items
Segment Information
Amortization of intangible assets	(107)	(67)	(107)	(67)
Restructuring charges	$ (675)	$ (1,508)	$ (736)	$ (1,406)