Income Taxes (Details) - Components Of The Provision For Income Taxes (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Current
Federal									$ (26,517)	$ (17,145)	$ (17,525)
State									(3,031)	(1,188)	(643)
Foreign									(9,611)	(8,220)	(3,737)
Total current provision for income taxes									(39,159)	(26,553)	(21,905)
Deferred
Federal									13,668	2,920	(450)
State									550	121	(757)
Total deferred provision for income taxes									14,218	3,041	(1,207)
Total provision for income taxes	$ (6,998)	$ (6,425)	$ (5,566)	$ (5,952)	$ (3,951)	$ (4,863)	$ (6,291)	$ (8,407)	$ (24,941)	$ (23,512)	$ (23,112)