Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Information
Total revenues	$ 144,346			$ 192,601	$ 485,309	$ 592,550
Operating income (loss) from continuing operations	(20,691)			1,588	(169,304)	10,417
Goodwill Impairment	0	$ (29,600)	$ (85,900)	0	(115,483)	0
Amortization of intangible assets	(323)			(55)	(2,349)	(162)
Litigation settlements	(4,496)			0	(4,496)	0
Restructuring charges	(417)			(1,002)	(1,156)	(1,738)
International
Segment Information
Goodwill Impairment					(115,483)
North America
Segment Information
Goodwill Impairment					0
Operating segment
Segment Information
Operating income (loss) from continuing operations	(15,455)			2,645	(45,820)	12,317
Operating segment | International
Segment Information
Total revenues	46,722			82,837	193,719	268,819
Operating income (loss) from continuing operations	(8,249)			4,556	(18,358)	16,194
Operating segment | North America
Segment Information
Total revenues	97,569			110,031	292,249	324,423
Operating income (loss) from continuing operations	5,186			10,266	12,625	30,649
Operating segment | Other
Segment Information
Total revenues	812			838	2,365	2,459
Operating income (loss) from continuing operations	29			48	203	173
Inter-segment
Segment Information
Total revenues	(757)			(1,105)	(3,024)	(3,151)
Corporate expenses
Segment Information
Operating income (loss) from continuing operations	(12,421)			(12,225)	(40,290)	(34,699)
Segment reconciling items
Segment Information
Goodwill Impairment	0			0	(115,483)	0
Amortization of intangible assets	(323)			(55)	(2,349)	(162)
Litigation settlements	(4,496)			0	(4,496)	0
Restructuring charges	$ (417)			$ (1,002)	$ (1,156)	$ (1,738)