CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 30,181	$ 37,125	$ 24,559
Other comprehensive income (loss): net of reclassification adjustments and income taxes
Foreign benefit plan, net of tax	(149)	(71)	211
Foreign currency translation adjustment, net of tax	6,545	9	(977)
Comprehensive income	$ 36,577	$ 37,063	$ 23,793