Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Beginning balance (in shares) at Dec. 31, 2021		33,799
Balance, value at Dec. 31, 2021	$ 825,258	$ 338	$ 314,541	$ 545,572	$ 187	$ (35,380)
Beginning balance (in shares) at Dec. 31, 2021						1,107
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	79,058			79,058
Foreign currency translation adjustment	(6,993)				(6,993)
Minimum post retirement benefit plan adjustments, net of taxes	37				37
Stock compensation expense	5,889		5,889
Net settlement of restricted stock units (in shares)		219				90
Net settlement of restricted stock units	(4,217)	$ 2	(2)			$ (4,217)
Awards of common stock (in shares)		16
Common stock repurchased under stock repurchase program (in shares)						1,333
Common stock repurchased under stock repurchase program	(55,541)					$ (55,541)
Ending balance (in shares) at Sep. 30, 2022		34,034
Balance, value at Sep. 30, 2022	843,491	$ 340	320,428	624,630	(6,769)	$ (95,138)
Ending balance (in shares) at Sep. 30, 2022						2,530
Beginning balance (in shares) at Jun. 30, 2022		33,989
Balance, value at Jun. 30, 2022	817,278	$ 340	318,664	590,335	(3,213)	$ (88,848)
Beginning balance (in shares) at Jun. 30, 2022						2,374
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	34,295			34,295
Foreign currency translation adjustment	(3,568)				(3,568)
Minimum post retirement benefit plan adjustments, net of taxes	12				12
Stock compensation expense	1,764		1,764
Net settlement of restricted stock units (in shares)		45				18
Net settlement of restricted stock units	(749)					$ (749)
Common stock repurchased under stock repurchase program (in shares)						138
Common stock repurchased under stock repurchase program	(5,541)					$ (5,541)
Ending balance (in shares) at Sep. 30, 2022		34,034
Balance, value at Sep. 30, 2022	$ 843,491	$ 340	320,428	624,630	(6,769)	$ (95,138)
Ending balance (in shares) at Sep. 30, 2022						2,530
Beginning balance (in shares) at Dec. 31, 2022	34,060	34,060
Balance, value at Dec. 31, 2022	$ 822,099	$ 340	322,873	627,978	(3,432)	$ (125,660)
Beginning balance (in shares) at Dec. 31, 2022	3,199					3,199
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 91,099			91,099
Foreign currency translation adjustment	(2,075)				(2,075)
Minimum post retirement benefit plan adjustments, net of taxes	24				24
Stock compensation expense	7,257		7,257
Net settlement of restricted stock units (in shares)		144				56
Net settlement of restricted stock units	(3,215)	$ 2	(2)			$ (3,215)
Awards of common stock (in shares)		8
Excise tax on repurchase of common stock	(159)					$ (159)
Common stock repurchased under stock repurchase program (in shares)						521
Common stock repurchased under stock repurchase program	$ (25,181)					$ (25,181)
Ending balance (in shares) at Sep. 30, 2023	34,060	34,212
Balance, value at Sep. 30, 2023	$ 889,849	$ 342	330,128	719,077	(5,483)	$ (154,215)
Ending balance (in shares) at Sep. 30, 2023	3,776					3,776
Beginning balance (in shares) at Jun. 30, 2023		34,194
Balance, value at Jun. 30, 2023	$ 850,310	$ 342	327,927	679,800	(4,115)	$ (153,644)
Beginning balance (in shares) at Jun. 30, 2023						3,770
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	39,277			39,277
Foreign currency translation adjustment	(1,376)				(1,376)
Minimum post retirement benefit plan adjustments, net of taxes	8				8
Stock compensation expense	2,201		2,201
Net settlement of restricted stock units (in shares)		18				6
Net settlement of restricted stock units	(412)					$ (412)
Excise tax on repurchase of common stock	$ (159)					(159)
Ending balance (in shares) at Sep. 30, 2023	34,060	34,212
Balance, value at Sep. 30, 2023	$ 889,849	$ 342	$ 330,128	$ 719,077	$ (5,483)	$ (154,215)
Ending balance (in shares) at Sep. 30, 2023	3,776					3,776