Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Consolidated Statements of Comprehensive Income
Net income	$ 18,906	$ 13,302	$ 35,386	$ 24,523
Other comprehensive income (loss):
Foreign currency translation adjustments	552	836	(820)	(276)
Amortization of actuarial loss and other adjustments from pension plan, net of tax	34	57	54	114
Other comprehensive income (loss):	586	893	(766)	(162)
Comprehensive income	$ 19,492	$ 14,195	$ 34,620	$ 24,361