Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock Including Additional Paid in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Dec. 31, 2022	47,107,000
Balance at Dec. 31, 2022	$ 975,276	$ 716,403	$ (23,077)	$ 1,668,602
Net income	0	330,469	0	330,469
Other comprehensive income	0	0	(24,026)	(24,026)
Dividends and dividend equivalents declared	$ 0	(147,474)	0	(147,474)
Common stock issued under the employee equity incentive plan (in shares)	786,000
Common stock issued under the employee equity incentive plan	$ 1,118	0	0	1,118
Common stock issued under the employee stock purchase plan (in shares)	18,000
Common stock issued under the employee stock purchase plan	$ 7,568	0	0	7,568
Stock-based compensation expense	$ 108,607	0	0	108,607
Balance (in shares) at Sep. 30, 2023	47,911,000
Balance at Sep. 30, 2023	$ 1,092,569	899,398	(47,103)	1,944,864
Balance (in shares) at Jun. 30, 2023	47,611,000
Balance at Jun. 30, 2023	$ 1,055,130	827,356	(43,397)	1,839,089
Net income	0	121,163	0	121,163
Other comprehensive income	0	0	(3,706)	(3,706)
Dividends and dividend equivalents declared	$ 0	(49,121)	0	(49,121)
Common stock issued under the employee equity incentive plan (in shares)	291,000
Common stock issued under the employee equity incentive plan	$ 4	0	0	4
Common stock issued under the employee stock purchase plan (in shares)	9,000
Common stock issued under the employee stock purchase plan	$ 3,831	0	0	3,831
Stock-based compensation expense	$ 33,604	0	0	33,604
Balance (in shares) at Sep. 30, 2023	47,911,000
Balance at Sep. 30, 2023	$ 1,092,569	899,398	(47,103)	$ 1,944,864
Balance (in shares) at Dec. 31, 2023	48,028,000			48,028,000
Balance at Dec. 31, 2023	$ 1,129,937	947,064	(27,062)	$ 2,049,939
Net income	0	337,337	0	337,337
Other comprehensive income	0	0	5,866	5,866
Dividends and dividend equivalents declared	$ 0	(185,642)	0	(185,642)
Common stock issued under the employee equity incentive plan (in shares)	752,000
Common stock issued under the employee equity incentive plan	$ 0	0	0	0
Common stock issued under the employee stock purchase plan (in shares)	18,000
Common stock issued under the employee stock purchase plan	$ 8,727	0	0	$ 8,727
Repurchases of common stock (in shares)	(19,000)			(19,000)
Repurchases of common stock	$ (14,160)	0	0	$ (14,160)
Stock-based compensation expense	$ 149,623	0	0	$ 149,623
Balance (in shares) at Sep. 30, 2024	48,779,000			48,779,000
Balance at Sep. 30, 2024	$ 1,274,127	1,098,759	(21,196)	$ 2,351,690
Balance (in shares) at Jun. 30, 2024	48,698,000
Balance at Jun. 30, 2024	$ 1,224,144	1,016,208	(44,494)	2,195,858
Net income	0	144,430	0	144,430
Other comprehensive income	0	0	23,298	23,298
Dividends and dividend equivalents declared	$ 0	(61,879)	0	(61,879)
Common stock issued under the employee equity incentive plan (in shares)	81,000
Common stock issued under the employee equity incentive plan	$ 0	0	0	0
Common stock issued under the employee stock purchase plan (in shares)	7,000
Common stock issued under the employee stock purchase plan	$ 4,121			$ 4,121
Repurchases of common stock (in shares)	(7,000)			(6,000)
Repurchases of common stock	$ (5,534)	0	0	$ (5,534)
Stock-based compensation expense	$ 51,396	0	0	$ 51,396
Balance (in shares) at Sep. 30, 2024	48,779,000			48,779,000
Balance at Sep. 30, 2024	$ 1,274,127	$ 1,098,759	$ (21,196)	$ 2,351,690