Income Taxes (Schedule of Components of Income Tax Expense) (Details) (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 tax:
Federal									$ (112)	$ (380)	$ 236
State									1,325	879	1,214
Foreign									3,149	2,302	1,479
Current Income Tax Expense (Benefit)									4,362	2,801	2,929
Deferred taxes:
Federal									(17,438)	(21,034)	15,013
State									1,304	(3,520)	(749)
Foreign									468	1,907	(839)
Deferred Income Tax Expense (Benefit)									(15,666)	(22,647)	13,425
Income tax (expense) benefit	$ (20,198)	$ 9,927	$ (1,070)	$ 37	$ (733)	$ (3,614)	$ (14,953)	$ (546)	$ (11,304)	$ (19,846)	$ 16,354