Condensed 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	$ 6,653	$ 5,904	$ 12,011	$ 13,261
Other comprehensive income (loss), net of tax:
Unrecognized actuarial gain, net of tax of $4, $0, $8 and $0, respectively	9		18
Foreign currency translation adjustments, net of tax of ($600), $681, $566 and ($1,496), respectively	(1,469)	1,560	545	(2,546)
Comprehensive income	$ 5,193	$ 7,464	$ 12,574	$ 10,715