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 (loss)	$ 32,281	$ (6,148)	$ (40,712)
Foreign currency translation adjustments (net of tax benefit of $413, $0, $0)	(14,454)	9,989	(4,932)
Comprehensive income (loss)	$ 17,827	$ 3,841	$ (45,644)