Income Taxes (Schedule of Components of Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current tax:
Federal									$ (380)	$ 236	$ 716
State									879	1,214	1,090
Foreign									2,302	1,479	1,301
Current Income Tax Expense (Benefit)									2,801	2,929	3,107
Deferred taxes:
Federal									(21,034)	15,013	7,199
State									(3,520)	(749)	102
Foreign									1,907	(839)	(752)
Deferred Income Tax Expense (Benefit)									(22,647)	13,425	6,549
Income tax expense (benefit)	$ (733)	$ (3,614)	$ (14,953)	$ (546)	$ 1,943	$ 1,461	$ 5,997	$ 6,953	$ (19,846)	$ 16,354	$ 9,656