UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Preferred Stock	Common Stock	Treasury Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2022	$ 1,386,103	$ 0	$ 18	$ (2,403)	$ 1,176,906	$ 190,423	$ 21,159
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, vesting of restricted stock, and related tax withholdings	(1,902)				(1,902)
Stock-based incentive compensation	5,988				5,988
Purchase of company stock	(75,735)			(75,735)
Net income	39,208					39,208
Other comprehensive income (loss)	(3,443)						(3,443)
Ending balance at Mar. 31, 2023	1,350,219	0	18	(78,138)	1,180,992	229,631	17,716
Beginning balance at Dec. 31, 2022	1,386,103	0	18	(2,403)	1,176,906	190,423	21,159
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	209,913
Other comprehensive income (loss)	(99)
Ending balance at Sep. 30, 2023	1,440,083	0	18	(179,205)	1,197,874	400,336	21,060
Beginning balance at Mar. 31, 2023	1,350,219	0	18	(78,138)	1,180,992	229,631	17,716
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, vesting of restricted stock, and related tax withholdings	(247)				(247)
Stock-based incentive compensation	7,685				7,685
Purchase of company stock, and related tax effects	32			32
Net income	114,403					114,403
Other comprehensive income (loss)	3,291						3,291
Ending balance at Jun. 30, 2023	1,475,383	0	18	(78,106)	1,188,430	344,034	21,007
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, vesting of restricted stock, and related tax withholdings	209				209
Stock-based incentive compensation	9,235				9,235
Purchase of company stock, and related tax effects	(101,099)			(101,099)
Net income	56,302					56,302
Other comprehensive income (loss)	53						53
Ending balance at Sep. 30, 2023	1,440,083	0	18	(179,205)	1,197,874	400,336	21,060
Beginning balance at Dec. 31, 2023	1,421,672	0	18	(255,107)	1,204,270	457,513	14,978
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, vesting of restricted stock, and related tax withholdings	(8,182)				(8,182)
Stock-based incentive compensation	9,605				9,605
Purchase of company stock, and related tax effects	(40,289)			(40,289)
Net income	44,791					44,791
Other comprehensive income (loss)	1,551						1,551
Ending balance at Mar. 31, 2024	1,429,148	0	18	(295,396)	1,205,693	502,304	16,529
Beginning balance at Dec. 31, 2023	1,421,672	0	18	(255,107)	1,204,270	457,513	14,978
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	151,690
Other comprehensive income (loss)	(5,475)
Ending balance at Sep. 30, 2024	1,426,231	0	18	(416,552)	1,224,059	609,203	9,503
Beginning balance at Mar. 31, 2024	1,429,148	0	18	(295,396)	1,205,693	502,304	16,529
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, vesting of restricted stock, and related tax withholdings	1,299				1,299
Stock-based incentive compensation	7,608				7,608
Purchase of company stock, and related tax effects	(78,768)			(78,768)
Net income	53,043					53,043
Other comprehensive income (loss)	(899)						(899)
Ending balance at Jun. 30, 2024	1,411,431	0	18	(374,164)	1,214,600	555,347	15,630
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Exercise of stock options, vesting of restricted stock, and related tax withholdings	(948)				(948)
Stock-based incentive compensation	10,407				10,407
Purchase of company stock, and related tax effects	(42,388)			(42,388)
Net income	53,856					53,856
Other comprehensive income (loss)	(6,127)						(6,127)
Ending balance at Sep. 30, 2024	$ 1,426,231	$ 0	$ 18	$ (416,552)	$ 1,224,059	$ 609,203	$ 9,503