CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings (Accumulated Deficit)	Treasury Stock	Accumulated  Other Comprehensive Income (Loss)
Balance (in shares) at Dec. 31, 2020		31,627,139
Beginning balance at Dec. 31, 2020	$ 444,123	$ 316	$ 184,732	$ 275,243	$ (36)	$ (16,132)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	139,791			139,791
Comprehensive income
Foreign exchange translation adjustments	(43)					(43)
Cash-flow hedges	1,789					1,789
Pension obligation adjustments	7,847					7,847
Other comprehensive income (loss), net of tax	9,593					9,593
Issuance of common stock (in shares)		128,291
Issuance of common stock	554	$ 2	552
Acquisition of treasury shares	(652)		(652)		0
Stock-based compensation	11,299		11,299
Dividends	(3,518)			(3,518)
Balance (in shares) at Dec. 31, 2021		31,755,430
Ending balance at Dec. 31, 2021	601,190	$ 318	195,931	411,516	(36)	(6,539)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	171,886			171,886
Comprehensive income
Foreign exchange translation adjustments	14					14
Cash-flow hedges	688					688
Pension obligation adjustments	1,640					1,640
Other comprehensive income (loss), net of tax	2,342					2,342
Issuance of common stock (in shares)		222,163
Issuance of common stock	1,304	$ 2	1,302
Acquisition of treasury shares	(33,748)		(33,739)		(9)
Stock-based compensation	10,279		10,279
Dividends	$ (15,073)		812	(15,885)
Balance (in shares) at Dec. 31, 2022	27,446,520	31,977,593
Ending balance at Dec. 31, 2022	$ 738,180	$ 320	174,585	567,517	(45)	(4,197)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	54,623			54,623
Comprehensive income
Foreign exchange translation adjustments	63					63
Cash-flow hedges	(150)					(150)
Pension obligation adjustments	140					140
Other comprehensive income (loss), net of tax	53					53
Issuance of common stock (in shares)		621,353
Issuance of common stock	876	$ 6	870
Acquisition of treasury shares	(46,151)		(46,138)		(13)
Stock-based compensation	8,313		8,313
Dividends	$ (16,657)		416	(17,073)
Balance (in shares) at Dec. 31, 2023	26,750,471	32,598,946
Ending balance at Dec. 31, 2023	$ 739,237	$ 326	$ 138,046	$ 605,067	$ (58)	$ (4,144)