Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive (Loss) Income	Treasury Stock
Balance, shares at Dec. 31, 2021		33,799				1,107
Balance at Dec. 31, 2021	$ 825,258	$ 338	$ 314,541	$ 545,572	$ 187	$ (35,380)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	82,406			82,406
Foreign currency translation adjustment	(5,022)				(5,022)
Postretirement benefit plan adjustments, net of taxes	1,403				1,403
Stock compensation expense	8,334		8,334
Net settlement of restricted stock units (in shares)		245				95
Net settlement of restricted stock units	(4,404)	$ 2	(2)			$ (4,404)
Awards of common stock (in shares)		16
Common stock repurchased under stock repurchase program (in shares)						1,997
Common stock repurchased under stock repurchase program	(85,876)					$ (85,876)
Balance, shares at Dec. 31, 2022		34,060				3,199
Balance at Dec. 31, 2022	822,099	$ 340	322,873	627,978	(3,432)	$ (125,660)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	110,533			110,533
Foreign currency translation adjustment	1,204				1,204
Postretirement benefit plan adjustments, net of taxes	114				114
Stock compensation expense	9,750		9,750
Net settlement of restricted stock units (in shares)		151				58
Net settlement of restricted stock units	(3,362)	$ 2	(2)			$ (3,362)
Awards of common stock (in shares)		8
Excise tax on repurchase of common shares	(159)					$ (159)
Common stock repurchased under stock repurchase program (in shares)						521
Common stock repurchased under stock repurchase program	(25,181)					$ (25,181)
Balance, shares at Dec. 31, 2023		34,219				3,778
Balance at Dec. 31, 2023	914,998	$ 342	332,621	738,511	(2,114)	$ (154,362)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	137,340			137,340
Foreign currency translation adjustment	(3,337)				(3,337)
Postretirement benefit plan adjustments, net of taxes	125				125
Stock compensation expense	10,963		10,963
Net settlement of restricted stock units (in shares)		86				27
Net settlement of restricted stock units	(2,035)	$ 1	(1)			$ (2,035)
Awards of common stock (in shares)		8
Excise tax on repurchase of common shares	(34)					$ (34)
Common stock repurchased under stock repurchase program (in shares)						155
Common stock repurchased under stock repurchase program	(9,986)					$ (9,986)
Balance, shares at Dec. 31, 2024		34,313				3,960
Balance at Dec. 31, 2024	$ 1,048,034	$ 343	$ 343,583	$ 875,851	$ (5,326)	$ (166,417)