Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (loss)	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2018		16,425,000
Beginning balance at Dec. 31, 2018	$ 321,266	$ 164	$ 187,172	$ 0	$ 133,930
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee benefit plans (in shares)		252,000
Issuance of common stock under employee benefit plans	$ 0	$ 3	(3)
Deemed repurchased shares of common and restricted stock for tax withholding (in shares)	(39,100,000)	(83,000)
Deemed repurchased shares of common and restricted stock for tax withholding	$ (2,510)	$ (1)	(2,509)
Stock-based compensation	$ 5,960		5,960
Repurchased and retired shares of common stock (in shares)	(1,416,304)	(1,416,000)
Repurchased and retired shares of common stock	$ (37,996)	$ (14)			(37,982)
Unrealized gain on hedging derivatives, net of taxes	0
Net income	10,013				10,013
Ending balance (in shares) at Dec. 31, 2019		15,178,000
Ending balance at Dec. 31, 2019	296,733	$ 152	190,620	0	105,961
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee benefit plans (in shares)		258,000
Issuance of common stock under employee benefit plans	$ 0	$ 2	(2)
Deemed repurchased shares of common and restricted stock for tax withholding (in shares)	(13,600,000)	(79,000)
Deemed repurchased shares of common and restricted stock for tax withholding	$ (2,097)	$ (1)	(2,096)
Stock-based compensation	$ 7,075		7,075
Repurchased and retired shares of common stock (in shares)	(547,563)	(548,000)
Repurchased and retired shares of common stock	$ (13,608)	$ (5)			(13,603)
Unrealized gain on hedging derivatives, net of taxes	0
Net income	18,822				18,822
Ending balance (in shares) at Dec. 31, 2020		14,809,000
Ending balance at Dec. 31, 2020	306,925	$ 148	195,597	0	111,180
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock under employee benefit plans (in shares)		319,000
Issuance of common stock under employee benefit plans	0	$ 3	(3)
Issuance of common stock in public offering (in shares)		3,680,000
Issuance of common stock in public offering	86,205	$ 37	86,168
Deemed repurchased shares of common and restricted stock for tax withholding (in shares)		(99,000)
Deemed repurchased shares of common and restricted stock for tax withholding	(3,032)	$ (1)	(3,031)
Stock-based compensation	7,654		7,654
Unrealized gain on hedging derivatives, net of taxes	108			108
Net income	17,752				17,752
Ending balance (in shares) at Dec. 31, 2021		18,709,000
Ending balance at Dec. 31, 2021	$ 415,612	$ 187	$ 286,385	$ 108	$ 128,932