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	15,456			15,456
Foreign currency translation adjustment	(227)				(227)
Minimum post retirement benefit plan adjustments, net of taxes	24				24
Stock compensation expense	1,352		1,352
Net settlement of restricted stock units, shares		173				72
Net settlement of restricted stock units	(3,461)	$ 2	(2)			$ (3,461)
Ending 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)
Ending balance (in shares) at Mar. 31, 2022						(1,179)
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	21,099			21,099
Foreign currency translation adjustment	(115)				(115)
Minimum post retirement benefit plan adjustments, net of taxes	8				8
Stock compensation expense	1,594		1,594
Net settlement of restricted stock units, shares		88				36
Net settlement of restricted stock units	(1,929)	$ 1	(1)			$ (1,929)
Common stock repurchased under stock repurchase program (in shares)						(154)
Common stock repurchased under stock repurchase program	$ (7,369)					$ (7,369)
Ending balance (in shares) at Mar. 31, 2023	34,060	34,148
Balance, value at Mar. 31, 2023	$ 835,387	$ 341	$ 324,466	$ 649,077	$ (3,539)	$ (134,958)
Ending balance (in shares) at Mar. 31, 2023						3,389