Supplemental Guarantors Consolidating Condensed Financial Information (Statement of Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Condensed Financial Statements, Captions
Net loss	$ (13,864)	$ (7,646)
Foreign currency translation adjustments	6,744	(11,388)
Comprehensive income (loss)	(7,120)	(19,034)
Parent [Member]
Condensed Financial Statements, Captions
Net loss	(13,864)	(7,646)
Foreign currency translation adjustments	0	0
Comprehensive income (loss)	(13,864)	(7,646)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions
Net loss	(7,993)	(4,356)
Foreign currency translation adjustments	0	0
Comprehensive income (loss)	(7,993)	(4,356)
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions
Net loss	(4,881)	(1,248)
Foreign currency translation adjustments	6,661	(11,518)
Comprehensive income (loss)	1,780	(12,766)
Consolidating Eliminations [Member]
Condensed Financial Statements, Captions
Net loss	12,874	5,604
Foreign currency translation adjustments	83	130
Comprehensive income (loss)	$ 12,957	$ 5,734