Condensed Consolidated Statements of Comprehensive (Loss) Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 695	$ (496)	$ (504)	$ (1,571)
Other comprehensive income (loss), net of tax:
Unrecognized actuarial gain, net of tax of $8, $8, $13 and $15, respectively	22	15	41	29
Foreign currency translation adjustments, net of tax of $834, $1,952, $494 and $2,411, respectively	(3,507)	3,778	(2,182)	4,629
Comprehensive income	$ (2,790)	$ 3,297	$ (2,645)	$ 3,087