CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 7,290	$ 7,401	$ 11,641	$ 12,575
Other comprehensive income (loss):
Interest rate swap	(152)	98	(881)	(800)
Less income tax benefit (expense)	59	(38)	343	311
Foreign currency translation adjustment	(423)	702	805	(1,609)
Less income tax benefit (expense)	(120)	(33)	(209)	73
Total other comprehensive income (loss)	(636)	729	58	(2,025)
Total comprehensive income	$ 6,654	$ 8,130	$ 11,699	$ 10,550