Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Operating Activities:
Net income	$ 107,305	$ 144,400	$ 281,498	$ 482,363
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation expense			14,358	50,348
Depreciation and amortization			17,870	20,663
Inventory impairments	6,200	28,415	27,500	29,075
Project abandonment costs			(963)	28,758
Amortization of discount of marketable debt securities			(24,864)	(1,082)
Deferred income tax benefit (expense)			2,608	(4,180)
Net changes in assets and liabilities:
Trade and other receivables			44,979	(19,321)
Mortgage loans held-for-sale, net			65,259	91,696
Prepaids and other assets			(3,097)	(8,050)
Accounts payable and accrued and other liabilities			(55,528)	12,506
Net cash provided by operating activities			623,149	343,953
Investing Activities:
Purchases of marketable securities			(1,088,433)	(291,126)
Maturities of marketable securities			1,249,000	0
Purchases of property and equipment			(14,880)	(21,429)
Net cash provided by (used in) investing activities			145,687	(312,555)
Financing Activities:
Payments on mortgage repurchase facility, net			(30,282)	(60,086)
Dividend payments			(114,172)	(106,785)
Issuance of shares under stock-based compensation programs, net			20,812	(11,545)
Net cash used in financing activities			(123,642)	(178,416)
Net increase (decrease) in cash, cash equivalents and restricted cash			645,194	(147,018)
Cash, cash equivalents and restricted cash:
Beginning of period			717,095	603,459
End of period	1,362,289	456,441	1,362,289	456,441
Reconciliation of cash, cash equivalents and restricted cash:
Total cash, cash equivalents and restricted cash	1,362,289	456,441	1,362,289	456,441
Homebuilding:
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Inventory impairments	6,200	28,415	27,500	29,075
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	1,207,532	417,298	1,207,532	417,298
Restricted cash	4,300	4,657	4,300	4,657
Financial Services:
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	$ 150,457	$ 34,486	150,457	34,486
Housing completed or under construction
Net changes in assets and liabilities:
Housing completed or under construction and land under development			(202,912)	(319,083)
Land and land under development
Net changes in assets and liabilities:
Housing completed or under construction and land under development			$ 456,441	$ (19,740)