Condensed Consolidating Statement of Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011 As Restated [Member]		Sep. 30, 2011 As Restated [Member]		Sep. 30, 2012 Parent [Member]	Sep. 30, 2012 Parent [Member]	Sep. 30, 2011 Parent [Member] As Restated [Member]	Sep. 30, 2011 Parent [Member] As Restated [Member]	Sep. 30, 2012 Guarantor Subsidiaries [Member]	Sep. 30, 2012 Guarantor Subsidiaries [Member]	Sep. 30, 2011 Guarantor Subsidiaries [Member] As Restated [Member]	Sep. 30, 2011 Guarantor Subsidiaries [Member] As Restated [Member]	Sep. 30, 2012 Non-Guarantor Subsidiaries [Member]	Sep. 30, 2012 Non-Guarantor Subsidiaries [Member]	Sep. 30, 2011 Non-Guarantor Subsidiaries [Member] As Restated [Member]	Sep. 30, 2011 Non-Guarantor Subsidiaries [Member] As Restated [Member]	Sep. 30, 2012 Consolidation, Eliminations [Member]	Sep. 30, 2012 Consolidation, Eliminations [Member]	Sep. 30, 2011 Consolidation, Eliminations [Member] As Restated [Member]	Sep. 30, 2011 Consolidation, Eliminations [Member] As Restated [Member]
Condensed Financial Statements, Captions [Line Items]
Net income	$ 11,051	$ 26,355	$ 18,287	[1]	$ 79,113	[1]	$ 11,051	$ 26,355	$ 18,287	$ 79,113	$ 14,630	$ 36,126	$ 20,840	$ 69,481	$ 2,872	$ 9,090	$ 2,959	$ 10,427	$ (17,502)	$ (45,216)	$ (23,799)	$ (79,908)
Foreign currency translation adjustment, net of tax	4,104	1,900	(8,070)	[1]	(4,943)	[1]	4,104	1,900	(8,070)	(4,943)	(61)	936	(550)	(794)	(589)	970	1,579	2,178	650	(1,906)	(1,029)	(1,384)
Unrealized gains (losses) on cash flow hedges, net of tax	973	556	(2,801)	[1]	(2,906)	[1]	973	556	(2,801)	(2,906)	0	0	0	0	0	0	0	0	0	0	0	0
Reclassification adjustment for gains in net income	985	3,700	(54)	[1]	(120)	[1]	985	3,700	(54)	(120)	0	0	0	0	0	0	0	0	0	0	0	0
Other comprehensive income (loss)	6,062	6,156	(10,925)	[1]	(7,969)	[1]	6,062	6,156	(10,925)	(7,969)	(61)	936	(550)	(794)	(589)	970	1,579	2,178	650	(1,906)	(1,029)	(1,384)
Comprehensive income	$ 17,113	$ 32,511	$ 7,362	[1]	$ 71,144	[1]	$ 17,113	$ 32,511	$ 7,362	$ 71,144	$ 14,569	$ 37,062	$ 20,290	$ 68,687	$ 2,283	$ 10,060	$ 4,538	$ 12,605	$ (16,852)	$ (47,122)	$ (24,828)	$ (81,292)

[1] (1) As restated - See Note 14 “Restatement of Previously Issued Financial Statements” of Notes to Condensed Consolidated Financial Statements.See notes to Condensed Consolidated Financial Statements.