CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income	Treasury Shares	Total
Balance at Dec. 31, 2021	$ 290	$ 122,354	$ 605,766		$ (45,937)	$ 682,473
Balance (in shares) at Dec. 31, 2021	29,025
Balance - Treasury Shares (in shares) at Dec. 31, 2021					(2,773)
Stock-based compensation expense		4,072				4,072
Restricted stock units vested	$ 1	(1)
Restricted stock units vested (in shares)	36
Shares withheld for taxes paid on stock awards		(834)				(834)
Net Income (Loss)			70,396			70,396
Balance at Sep. 30, 2022	$ 291	125,591	676,162		$ (45,937)	756,107
Balance (in shares) at Sep. 30, 2022	29,061
Balance - Treasury Shares (in shares) at Sep. 30, 2022					(2,773)
Balance at Jun. 30, 2022	$ 290	124,690	652,956		$ (45,937)	731,999
Balance (in shares) at Jun. 30, 2022	29,045
Balance - Treasury Shares (in shares) at Jun. 30, 2022					(2,773)
Stock-based compensation expense		1,282				1,282
Restricted stock units vested	$ 1	(1)
Restricted stock units vested (in shares)	16
Shares withheld for taxes paid on stock awards		(380)				(380)
Net Income (Loss)			23,206			23,206
Balance at Sep. 30, 2022	$ 291	125,591	676,162		$ (45,937)	756,107
Balance (in shares) at Sep. 30, 2022	29,061
Balance - Treasury Shares (in shares) at Sep. 30, 2022					(2,773)
Balance at Dec. 31, 2022	$ 291	125,784	686,037		$ (45,937)	766,175
Balance (in shares) at Dec. 31, 2022	29,123
Balance - Treasury Shares (in shares) at Dec. 31, 2022					(2,773)
Issuance of common stock under Employee Stock Purchase Plan		537				537
Issuance of common stock under Employee Stock Purchase Plan (in shares)	13
Stock-based compensation expense		5,425				5,425
Restricted stock units vested	$ 1	(1)
Restricted stock units vested (in shares)	38
Shares withheld for taxes paid on stock awards		(870)				(870)
Repurchase of common stock for treasury					$ (5,446)	(5,446)
Repurchase of common stock for treasury (in shares)					(129)
Dividend declaration			(6,307)			(6,307)
Net Income (Loss)			59,493			59,493
Other comprehensive income, net of tax				$ 154		154
Balance at Sep. 30, 2023	$ 292	130,875	739,223	154	$ (51,383)	819,161
Balance (in shares) at Sep. 30, 2023	29,174
Balance - Treasury Shares (in shares) at Sep. 30, 2023					(2,902)
Balance at Jun. 30, 2023	$ 291	129,486	715,726		$ (51,383)	794,120
Balance (in shares) at Jun. 30, 2023	29,158
Balance - Treasury Shares (in shares) at Jun. 30, 2023					(2,902)
Stock-based compensation expense		1,789				1,789
Restricted stock units vested	$ 1	(1)
Restricted stock units vested (in shares)	16
Shares withheld for taxes paid on stock awards		(399)				(399)
Dividend declaration			(2,101)			(2,101)
Net Income (Loss)			25,598			25,598
Other comprehensive income, net of tax				154		154
Balance at Sep. 30, 2023	$ 292	$ 130,875	$ 739,223	$ 154	$ (51,383)	$ 819,161
Balance (in shares) at Sep. 30, 2023	29,174
Balance - Treasury Shares (in shares) at Sep. 30, 2023					(2,902)