Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning Balances, value at Dec. 31, 2019	$ 1,014,832	$ 3,696	$ 512,019	$ 515,876	$ (16,759)
Balances, shares at Dec. 31, 2019		36,957
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	10,398		10,398
Shares repurchased and retired, value	(25,220)	$ (97)	(10,704)	(14,419)
Shares repurchased and retired, shares		(964)
Stock options exercised, value	$ 958	$ 5	953
Stock options exercised, shares	76	55
Vesting of restricted stock units, value		$ 34	(34)
Vesting of restricted stock units, shares		336
Shares withheld for taxes, value	$ (2,236)	$ (9)	(2,227)
Shares withheld for taxes, shares		(89)
Dividends declared	(23,307)			(23,307)
Net income	14,055			14,055
Other comprehensive income loss	108				108
Ending Balances, value at Dec. 31, 2020	989,588	$ 3,629	510,405	492,205	(16,651)
Balances, shares at Dec. 31, 2020		36,295
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	15,262		15,262
Shares repurchased and retired, value	(40,216)	$ (138)	(15,362)	(24,716)
Shares repurchased and retired, shares		(1,380)
Stock options exercised, value	$ 346	$ 3	343
Stock options exercised, shares	54	30
Vesting of restricted stock units, value		$ 38	(38)
Vesting of restricted stock units, shares		377
Shares withheld for taxes, value	$ (3,174)	$ (11)	(3,163)
Shares withheld for taxes, shares		(109)
Dividends declared	(23,267)			(23,267)
Net income	35,770			35,770
Other comprehensive income loss	(507)				(507)
Ending Balances, value at Dec. 31, 2021	$ 973,802	$ 3,521	507,447	479,992	(17,158)
Balances, shares at Dec. 31, 2021	35,213	35,213
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation expense	$ 18,485		18,485
Shares repurchased and retired, value	(9,391)	$ (37)	(4,177)	(5,177)
Shares repurchased and retired, shares		(376)
Stock options exercised, value	$ 716	$ 4	712
Stock options exercised, shares	53	45
Vesting of restricted stock units, value		$ 41	(41)
Vesting of restricted stock units, shares		407
Shares withheld for taxes, value	$ (3,201)	$ (13)	(3,188)
Shares withheld for taxes, shares		(125)
Dividends declared	(23,149)			(23,149)
Net income	68,229			68,229
Other comprehensive income loss	925				925
Ending Balances, value at Dec. 31, 2022	$ 1,026,416	$ 3,516	$ 519,238	$ 519,895	$ (16,233)
Balances, shares at Dec. 31, 2022	35,164	35,164