Supplemental Guarantors Consolidating Condensed Financial Information (Statement of Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Condensed Financial Statements, Captions
Net loss	$ (13,379)	$ (13,864)
Foreign currency translation adjustments	822	6,744
Comprehensive income (loss)	(12,557)	(7,120)
Consolidation, Eliminations [Member]
Condensed Financial Statements, Captions
Net loss	7,520	12,874
Foreign currency translation adjustments	111	83
Comprehensive income (loss)	7,631	12,957
Parent [Member]
Condensed Financial Statements, Captions
Net loss	(13,379)	(13,864)
Foreign currency translation adjustments	0	0
Comprehensive income (loss)	(13,379)	(13,864)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions
Net loss	(7,395)	(7,993)
Foreign currency translation adjustments	0	0
Comprehensive income (loss)	(7,395)	(7,993)
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions
Net loss	(125)	(4,881)
Foreign currency translation adjustments	711	6,661
Comprehensive income (loss)	$ 586	$ 1,780