Restatement of Previously Issued Financial Statements Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Jun. 30, 2011 Scenario, Previously Reported [Member]	Jun. 30, 2011 Scenario, Previously Reported [Member]	Jun. 30, 2011 Scenario, Adjustment [Member]	Jun. 30, 2011 Scenario, Adjustment [Member]	Jun. 30, 2011 As Restated [Member]		Jun. 30, 2011 As Restated [Member]
Net income (loss)	$ 10,605	$ 15,304	$ 10,119	$ 55,647	$ 2,594	$ 5,179	$ 12,713	[1]	$ 60,826	[1]
Foreign currency translation (losses) gains, net of tax	(4,790)	(2,204)	1,857	3,117	1	10	1,858	[1]	3,127	[1]
Unrealized gains (losses) on cash flow hedges, net of tax	(2,117)	(417)	(360)	(170)	90	65	(270)	[1]	(105)	[1]
Reclassification adjustment for gains (losses) in net income	1,428	2,715	0	0	(90)	(66)	(90)	[1]	(66)	[1]
Other comprehensive income (loss)	(5,479)	94	1,497	2,947	1	9	1,498	[1]	2,956	[1]
Comprehensive (loss) income	$ 5,126	$ 15,398	$ 11,616	$ 58,594	$ 2,595	$ 5,188	$ 14,211	[1]	$ 63,782	[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.