CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Beginning balance (in shares) at Dec. 31, 2020		116,735
Beginning balance at Dec. 31, 2020	$ 523,338	$ 122	$ 516,140	$ (75,795)	$ 415	$ 82,456
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of options (in shares)		1,832
Issuance of common stock upon exercise of options	10,083	$ 2	10,081
Purchases of treasury stock (in shares)		(1,282)
Purchases of treasury stock	(33,540)			(33,540)
Shares purchased to satisfy cost and statutory withholding requirements for net settlement of cashless option exercises		(808)
Shares purchased to satisfy cost and statutory withholding requirements for net settlement of cashless option exercises	(22,520)			(22,520)
Stock-based compensation	10,142		10,142
Other comprehensive income (loss), net of tax	(166)				(166)
Net income attributable to common stockholders	23,465					23,465
Ending balance (in shares) at Mar. 31, 2021		116,477
Ending balance at Mar. 31, 2021	510,802	$ 124	536,363	(131,855)	249	105,921
Beginning balance (in shares) at Dec. 31, 2020		116,735
Beginning balance at Dec. 31, 2020	523,338	$ 122	516,140	(75,795)	415	82,456
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to common stockholders	49,988
Ending balance (in shares) at Jun. 30, 2021		115,821
Ending balance at Jun. 30, 2021	522,675	$ 125	554,154	(164,263)	215	132,444
Beginning balance (in shares) at Mar. 31, 2021		116,477
Beginning balance at Mar. 31, 2021	510,802	$ 124	536,363	(131,855)	249	105,921
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of options (in shares)		855
Issuance of common stock upon exercise of options	6,661	$ 1	6,660
Purchases of treasury stock (in shares)		(1,365)
Purchases of treasury stock	(29,170)			(29,170)
Shares purchased to satisfy cost and statutory withholding requirements for net settlement of cashless option exercises		(146)
Shares purchased to satisfy cost and statutory withholding requirements for net settlement of cashless option exercises	(3,238)			(3,238)
Stock-based compensation	11,131		11,131
Other comprehensive income (loss), net of tax	(34)				(34)
Net income attributable to common stockholders	26,523					26,523
Ending balance (in shares) at Jun. 30, 2021		115,821
Ending balance at Jun. 30, 2021	522,675	$ 125	554,154	(164,263)	215	132,444
Beginning balance (in shares) at Dec. 31, 2021		105,940
Beginning balance at Dec. 31, 2021	375,806	$ 127	591,349	(410,411)	(227)	194,968
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of options (in shares)		586
Issuance of common stock upon exercise of options	6,544	$ 1	6,543
Shares purchased to satisfy cost and statutory withholding requirements for net settlement of cashless option exercises		(305)
Shares purchased to satisfy cost and statutory withholding requirements for net settlement of cashless option exercises	(7,037)			(7,037)
Stock-based compensation	10,825		10,825
Other comprehensive income (loss), net of tax	(1,124)				(1,124)
Net income attributable to common stockholders	22,797					22,797
Ending balance (in shares) at Mar. 31, 2022		106,221
Ending balance at Mar. 31, 2022	407,811	$ 128	608,717	(417,448)	(1,351)	217,765
Beginning balance (in shares) at Dec. 31, 2021		105,940
Beginning balance at Dec. 31, 2021	375,806	$ 127	591,349	(410,411)	(227)	194,968
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to common stockholders	50,209
Ending balance (in shares) at Jun. 30, 2022		106,658
Ending balance at Jun. 30, 2022	442,326	$ 128	625,976	(426,814)	(2,141)	245,177
Beginning balance (in shares) at Mar. 31, 2022		106,221
Beginning balance at Mar. 31, 2022	407,811	$ 128	608,717	(417,448)	(1,351)	217,765
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock upon exercise of options (in shares)		873
Issuance of common stock upon exercise of options	6,597	$ 0	6,597
Shares purchased to satisfy cost and statutory withholding requirements for net settlement of cashless option exercises		(436)
Shares purchased to satisfy cost and statutory withholding requirements for net settlement of cashless option exercises	(9,366)			(9,366)
Stock-based compensation	10,662		10,662
Other comprehensive income (loss), net of tax	(790)				(790)
Net income attributable to common stockholders	27,412					27,412
Ending balance (in shares) at Jun. 30, 2022		106,658
Ending balance at Jun. 30, 2022	$ 442,326	$ 128	$ 625,976	$ (426,814)	$ (2,141)	$ 245,177