Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net income	$ 110,533	$ 82,406	$ 75,629
Other comprehensive income (loss):
Foreign currency translation adjustment	1,204	(5,022)	2,512
Adjustment to postretirement benefit liability, net of tax	114	1,403	136
Other comprehensive income (loss)	1,318	(3,619)	2,648
Total comprehensive income	$ 111,851	$ 78,787	$ 78,277