CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In Capital	Retained Earnings	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		2,790			2,790
Restricted stock units vested (in shares)	20
Shares withheld for taxes paid on stock awards		(454)			(454)
Net Income (Loss)			47,190		47,190
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)
Balance at Mar. 31, 2022	$ 290	123,571	627,558	$ (45,937)	705,482
Balance (in shares) at Mar. 31, 2022	29,034
Balance - Treasury Shares (in shares) at Mar. 31, 2022				(2,773)
Stock-based compensation expense		1,408			1,408
Restricted stock units vested (in shares)	11
Shares withheld for taxes paid on stock awards		(289)			(289)
Net Income (Loss)			25,398		25,398
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)
Balance at Dec. 31, 2022	$ 291	125,784	686,037	$ (45,937)	766,175
Balance (in shares) at Dec. 31, 2022	29,123			(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		3,636			3,636
Restricted stock units vested (in shares)	22
Shares withheld for taxes paid on stock awards		(471)			(471)
Repurchase of common stock for treasury				$ (5,392)	(5,392)
Repurchase of common stock for treasury (in shares)				(129)
Excise tax on stock repurchases				$ (54)	(54)
Dividend declaration			(4,206)		(4,206)
Net Income (Loss)			33,895		33,895
Balance at Jun. 30, 2023	$ 291	129,486	715,726	$ (51,383)	794,120
Balance (in shares) at Jun. 30, 2023	29,158			(2,902)
Balance at Mar. 31, 2023	$ 291	127,424	698,128	$ (49,360)	776,483
Balance (in shares) at Mar. 31, 2023	29,133			(2,852)
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		1,783			1,783
Restricted stock units vested (in shares)	12
Shares withheld for taxes paid on stock awards		(258)			(258)
Repurchase of common stock for treasury				$ (1,969)	(1,969)
Repurchase of common stock for treasury (in shares)				(50)
Excise tax on stock repurchases				$ (54)	(54)
Dividend declaration			(2,099)		(2,099)
Net Income (Loss)			19,697		19,697
Balance at Jun. 30, 2023	$ 291	$ 129,486	$ 715,726	$ (51,383)	$ 794,120
Balance (in shares) at Jun. 30, 2023	29,158			(2,902)