Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income before income taxes:
Domestic	$ 38,359	$ 31,738	$ 27,827
Foreign	4,464	6,750	7,975
Total income before income taxes	42,823	38,488	35,802
Current:
Federal	11,799	10,348	7,846
State and local	2,600	2,130	1,653
Foreign	1,439	2,539	2,899
Total current	15,838	15,017	12,398
Deferred:
Federal	(9)	226	856
State and local	(23)	159	236
Foreign	(81)	(670)	(376)
Total deferred	(113)	(285)	716
Total income tax expense	$ 15,725	$ 14,732	$ 13,114