Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 67,888	$ 63,531	$ 50,971
Other comprehensive income:
Translation adjustment, net of tax benefit (expense) of ($57), ($63) and $29 for 2015, 2014 and 2013, respectively	(20,939)	(24,896)	5,941
Unamortized pension adjustments, net of tax benefit (expense) of $82, $67 and ($3) for 2015, 2014 and 2013, respectively	(457)	(370)	46
Comprehensive income	$ 46,492	$ 38,265	$ 56,958