Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ 24,333	$ (3,349)	$ (9,889)
Other comprehensive income (loss)
Adoption of ASU 2018-02		(315)
Foreign currency translation adjustment	1,649	(3,501)	2,391
Reclassification of foreign currency translation adjustment into net income (loss)			17,201
Pension liability, net of tax expense of $94, $25 and $14, respectively	282	77	41
Total other comprehensive income (loss)	1,931	(3,739)	19,633
Comprehensive income (loss)	$ 26,264	$ (7,088)	$ 9,744