Supplemental Guarantors Consolidating Condensed Financial Information (Statement of Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ 1,129	$ (5,111)	$ 17,105	$ (9,626)
Unrealized loss on securities held as available for sale, net of tax:
Unrealized net holding loss arising during the period	0	(284)	(32)	(461)
Less: Reclassification adjustment for realized gains included in earnings	0	0	(230)	(2,467)
Foreign currency translation adjustments	5,101	(10,503)	4,762	(6,069)
Comprehensive income (loss)	6,230	(15,898)	21,605	(18,623)
Parent [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)			17,105	(9,626)
Unrealized loss on securities held as available for sale, net of tax:
Unrealized net holding loss arising during the period			0	0
Less: Reclassification adjustment for realized gains included in earnings			0	0
Foreign currency translation adjustments			0	0
Comprehensive income (loss)			17,105	(9,626)
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)			28,376	11,608
Unrealized loss on securities held as available for sale, net of tax:
Unrealized net holding loss arising during the period			(32)	(461)
Less: Reclassification adjustment for realized gains included in earnings			(230)	(2,467)
Foreign currency translation adjustments			0	(1)
Comprehensive income (loss)			28,114	8,679
Non-Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)			11,078	161
Unrealized loss on securities held as available for sale, net of tax:
Unrealized net holding loss arising during the period			0	0
Less: Reclassification adjustment for realized gains included in earnings			0	0
Foreign currency translation adjustments			4,762	(6,068)
Comprehensive income (loss)			15,840	(5,907)
Consolidating Eliminations [Member]
Condensed Financial Statements, Captions [Line Items]
Net income (loss)			(39,454)	(11,769)
Unrealized loss on securities held as available for sale, net of tax:
Unrealized net holding loss arising during the period			0	0
Less: Reclassification adjustment for realized gains included in earnings			0	0
Foreign currency translation adjustments			0	0
Comprehensive income (loss)			$ (39,454)	$ (11,769)