Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ 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, 2020	45,267
Balance at Dec. 31, 2020	$ 657,701	$ 298,746	$ 10,140	$ 966,587
Net income	0	169,352	0	169,352
Other comprehensive income (loss)	0	0	1,522	1,522
Dividends and dividend equivalents declared	$ 0	(86,905)	0	(86,905)
Common stock issued under the employee equity incentive plan (in shares)	807
Common stock issued under the employee equity incentive plan	$ 15,147	0	0	15,147
Common stock issued under the employee stock purchase plan (in shares)	17
Common stock issued under the employee stock purchase plan	$ 4,670	0	0	4,670
Stock-based compensation expense	92,340	0	0	92,340
Other comprehensive loss	$ 0	0	1,522	1,522
Balance (in shares) at Sep. 30, 2021	46,091
Balance at Sep. 30, 2021	$ 769,858	381,193	11,662	1,162,713
Balance (in shares) at Jun. 30, 2021	45,917
Balance at Jun. 30, 2021	$ 733,672	341,382	12,301	1,087,355
Net income	0	68,770	0	68,770
Other comprehensive income (loss)	0	0	(639)	(639)
Dividends and dividend equivalents declared	$ 0	(28,959)	0	(28,959)
Common stock issued under the employee equity incentive plan (in shares)	167
Common stock issued under the employee equity incentive plan	$ 2,227	0	0	2,227
Common stock issued under the employee stock purchase plan (in shares)	7
Common stock issued under the employee stock purchase plan	$ 2,377	0	0	2,377
Stock-based compensation expense	31,582	0	0	31,582
Other comprehensive loss	$ 0	0	(639)	(639)
Balance (in shares) at Sep. 30, 2021	46,091
Balance at Sep. 30, 2021	$ 769,858	381,193	11,662	$ 1,162,713
Balance (in shares) at Dec. 31, 2021	46,256			46,256
Balance at Dec. 31, 2021	$ 803,226	424,879	15,880	$ 1,243,985
Net income	0	318,582	0	318,582
Other comprehensive income (loss)	0	0	(57,804)	(57,804)
Dividends and dividend equivalents declared	$ 0	(109,821)	0	(109,821)
Common stock issued under the employee equity incentive plan (in shares)	671
Common stock issued under the employee equity incentive plan	$ 4,345	0	0	4,345
Common stock issued under the employee stock purchase plan (in shares)	14
Common stock issued under the employee stock purchase plan	$ 5,877	0	0	5,877
Stock-based compensation expense	125,545	0	0	125,545
Other comprehensive loss	$ 0	0	(57,804)	$ (57,804)
Balance (in shares) at Sep. 30, 2022	46,941			46,941
Balance at Sep. 30, 2022	$ 938,993	633,640	(41,924)	$ 1,530,709
Balance (in shares) at Jun. 30, 2022	46,787
Balance at Jun. 30, 2022	$ 891,888	545,920	(14,686)	1,423,122
Net income	0	124,337	0	124,337
Other comprehensive income (loss)	0	0	(27,238)	(27,238)
Dividends and dividend equivalents declared	$ 0	(36,617)	0	(36,617)
Common stock issued under the employee equity incentive plan (in shares)	147
Common stock issued under the employee equity incentive plan	$ 1,014	0	0	1,014
Common stock issued under the employee stock purchase plan (in shares)	7
Common stock issued under the employee stock purchase plan	$ 3,091	0	0	3,091
Stock-based compensation expense	43,000	0	0	43,000
Other comprehensive loss	$ 0	0	(27,238)	$ (27,238)
Balance (in shares) at Sep. 30, 2022	46,941			46,941
Balance at Sep. 30, 2022	$ 938,993	$ 633,640	$ (41,924)	$ 1,530,709