Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income		$ 28,876	$ 23,000	$ 491
Other comprehensive income (loss), net of tax
Currency translation adjustment	[1]	(1,417)	2,263	220
Comprehensive income		27,459	25,263	711
Net income (loss) attributable to non-controlling interest, net of tax		(16)	184	1,652
Total comprehensive income		$ 27,475	$ 25,079	$ (941)

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