Supplemental Guarantors Consolidating Condensed Financial Information (Statement of Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ 2,575	$ 6,368	$ 4,467	$ 8,106
Foreign currency translation adjustments	4,955	(5,075)	(576)	(8,152)
Comprehensive income (loss)	7,530	1,293	3,891	(46)
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)			4,467	8,106
Foreign currency translation adjustments			0	0
Comprehensive income (loss)			4,467	8,106
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)			11,187	23,213
Foreign currency translation adjustments			0	0
Comprehensive income (loss)			11,187	23,213
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)			(1,791)	(435)
Foreign currency translation adjustments			(577)	(8,152)
Comprehensive income (loss)			(2,368)	(8,587)
Consolidating Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)			(9,396)	(22,778)
Foreign currency translation adjustments			1	0
Comprehensive income (loss)			$ (9,395)	$ (22,778)