Income Taxes (Schedule of Components of Income Tax Expense (Benefit)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:
Domestic	$ 10,605	$ 9,273	$ 7,771
Foreign	3,200	4,919	5,682
State	2,366	756	1,139
Provision for current income tax expense (benefit)	16,171	14,948	14,592
Deferred:
Domestic	(1,074)	(192)	397
Foreign	249	(363)	331
State	(52)	150	122
Provision for deferred income tax expense (benefit)	(877)	(405)	850
Total income taxes	$ 15,294	$ 14,543	$ 15,442