Consolidated Statement 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
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	44,763			44,763
Foreign currency translation adjustment	(3,425)				(3,425)
Minimum post retirement benefit plan adjustments, net of taxes	25				25
Stock compensation expense	4,125		4,125
Net settlement of restricted stock units (in shares)		174				72
Net settlement of restricted stock units	(3,468)	$ 2	(2)			$ (3,468)
Awards of common stock (in shares)		16
Common stock repurchased under stock repurchase program (in shares)						1,195
Common stock repurchased under stock repurchase program	(50,000)					$ (50,000)
Ending 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)
Ending balance (in shares) at Jun. 30, 2022						(2,374)
Beginning balance (in shares) at Mar. 31, 2022		33,972
Balance, value at Mar. 31, 2022	838,402	$ 340	315,891	561,028	(16)	$ (38,841)
Beginning balance (in shares) at Mar. 31, 2022						(1,179)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,307			29,307
Foreign currency translation adjustment	(3,198)				(3,198)
Minimum post retirement benefit plan adjustments, net of taxes	1				1
Stock compensation expense	2,773		2,773
Net settlement of restricted stock units (in shares)		1
Net settlement of restricted stock units	(7)					$ (7)
Awards of common stock (in shares)		16
Common stock repurchased under stock repurchase program (in shares)						1,195
Common stock repurchased under stock repurchase program	(50,000)					$ (50,000)
Ending 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)
Ending balance (in shares) at Jun. 30, 2022						(2,374)
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	$ 51,822			51,822
Foreign currency translation adjustment	(699)				(699)
Minimum post retirement benefit plan adjustments, net of taxes	16				16
Stock compensation expense	5,056		5,056
Net settlement of restricted stock units (in shares)		126				50
Net settlement of restricted stock units	(2,803)	$ 2	(2)			$ (2,803)
Awards of common stock (in shares)		8
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 Jun. 30, 2023	34,060	34,194
Balance, value at Jun. 30, 2023	$ 850,310	$ 342	327,927	679,800	(4,115)	$ (153,644)
Ending balance (in shares) at Jun. 30, 2023	(3,770)					(3,770)
Beginning balance (in shares) at Mar. 31, 2023		34,148
Balance, value at Mar. 31, 2023	$ 835,387	$ 341	324,466	649,077	(3,539)	$ (134,958)
Beginning balance (in shares) at Mar. 31, 2023						(3,389)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	30,723			30,723
Foreign currency translation adjustment	(584)				(584)
Minimum post retirement benefit plan adjustments, net of taxes	8				8
Stock compensation expense	3,462		3,462
Net settlement of restricted stock units (in shares)		38				14
Net settlement of restricted stock units	(874)	$ 1	(1)			$ (874)
Awards of common stock (in shares)		8
Common stock repurchased under stock repurchase program (in shares)						367
Common stock repurchased under stock repurchase program	$ (17,812)					$ (17,812)
Ending balance (in shares) at Jun. 30, 2023	34,060	34,194
Balance, value at Jun. 30, 2023	$ 850,310	$ 342	$ 327,927	$ 679,800	$ (4,115)	$ (153,644)
Ending balance (in shares) at Jun. 30, 2023	(3,770)					(3,770)