Restatement of Previously Issued Financial Statements 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
	Sep. 30, 2012	Sep. 30, 2012	Sep. 30, 2011 Scenario, Previously Reported [Member]	Sep. 30, 2011 Scenario, Previously Reported [Member]	Sep. 30, 2011 Scenario, Adjustment [Member]	Sep. 30, 2011 Scenario, Adjustment [Member]	Sep. 30, 2011 As Restated [Member]		Sep. 30, 2011 As Restated [Member]
Net income (loss)	$ 11,051	$ 26,355	$ 16,803	$ 72,450	$ 1,484	$ 6,663	$ 18,287	[1]	$ 79,113	[1]
Foreign currency translation adjustment, net of tax	4,104	1,900	(8,075)	(4,958)	5	15	(8,070)	[1]	(4,943)	[1]
Unrealized gains (losses) on cash flow hedges, net of tax	973	556	(2,856)	(3,026)	55	120	(2,801)	[1]	(2,906)	[1]
Reclassification adjustment for (gains) losses in net income	985	3,700	0	0	(54)	(120)	(54)	[1]	(120)	[1]
Other comprehensive income	6,062	6,156	(10,931)	(7,984)	6	15	(10,925)	[1]	(7,969)	[1]
Comprehensive income	$ 17,113	$ 32,511	$ 5,872	$ 64,466	$ 1,490	$ 6,678	$ 7,362	[1]	$ 71,144	[1]

[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.