Income Taxes (Income Tax Components) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal	$ 20,849	$ 9,814	$ 1,748
State	3,353	1,447	522
Foreign	2,645	1,465	412
Total Current	26,847	12,726	2,682
Deferred:
Federal	5,467	3,759	2,271
State	565	488	0
Foreign	(822)	(261)	(212)
Total Deferred	5,210	3,986	2,059
Change in Valuation Allowance	246	454	215
Total	$ 32,303	$ 17,166	$ 4,956