Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current:
Federal	$ 23,816	$ 39,015	$ 22,288
State and local	3,492	5,603	3,613
Foreign	757	962	1,156
Foreign	28,065	45,580	27,057
Deferred:
Federal	14,808	5,281	13,558
State and local	1,982	553	595
Foreign	(287)	(361)	(1,948)
Total deferred income tax provision	16,503	5,473	12,205
Federal	38,624	44,296	35,846
State and local	5,474	6,156	4,208
Foreign	470	601	(792)
Total income tax expense	$ 44,568	$ 51,053	$ 39,262