Supplemental Guarantors Consolidating Condensed Financial Information (Statement of Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Financial Statements, Captions
Net income (loss)	$ (4,055)	$ 4,486	$ (13,977)	$ 8,953
Foreign currency translation adjustments	(8,255)	(6,882)	(17,717)	(7,458)
Comprehensive income (loss)	(12,310)	(2,396)	(31,694)	1,495
Parent [Member]
Condensed Financial Statements, Captions
Net income (loss)	(4,055)	4,486	(13,977)	8,953
Foreign currency translation adjustments	0	0	0	0
Comprehensive income (loss)	(4,055)	4,486	(13,977)	8,953
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions
Net income (loss)	(209)	8,472	(2,480)	19,659
Foreign currency translation adjustments	0	0	0	0
Comprehensive income (loss)	(209)	8,472	(2,480)	19,659
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions
Net income (loss)	(3,211)	(2,501)	(4,306)	(4,292)
Foreign currency translation adjustments	(8,262)	(6,891)	(17,852)	(7,468)
Comprehensive income (loss)	(11,473)	(9,392)	(22,158)	(11,760)
Consolidating Eliminations [Member]
Condensed Financial Statements, Captions
Net income (loss)	3,420	(5,971)	6,786	(15,367)
Foreign currency translation adjustments	7	9	135	10
Comprehensive income (loss)	$ 3,427	$ (5,962)	$ 6,921	$ (15,357)