Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Operating Activities:
Net Income	$ 562,139	$ 573,657	$ 367,582
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation expense	60,985	39,655	30,062
Depreciation and amortization	27,751	31,666	27,166
Inventory impairments	121,875	1,600	0
Net loss on marketable equity securities	0	0	8,285
Gain on sale of other assets	0	(2,014)	0
Amortization of discount of marketable debt securities	(4,290)	0	0
Impairment of Long-Lived Assets to be Disposed of	33,129	5,417	5,233
Loss on debt retirement	0	23,571	0
Deferred income tax expense	(31,310)	(6,488)	10,688
Net changes in assets and liabilities:
Trade and other receivables	(21,784)	(25,334)	(12,815)
Mortgage loans held-for-sale, net	53,016	(49,973)	(35,535)
Prepaids and other assets	31,736	8,545	(44,932)
Accounts payable and accrued liabilities	(18,464)	126,415	91,318
Net cash provided by (used in) operating activities	905,646	(207,990)	(23,095)
Investing Activities:
Purchases of marketable securities	(656,810)	0	(10,804)
Sales of marketable securities	0	0	59,266
Maturities of marketable securities	100,000	0	0
Proceeds from sale of other assets	0	2,014	0
Purchases of property and equipment	(29,075)	(29,693)	(26,777)
Net cash provided by (used in) investing activities	(585,885)	(27,679)	21,685
Financing Activities:
Advances on mortgage repurchase facility, net	(80,548)	53,910	52,774
Payments on homebuilding line of credit, net	0	0	(5,000)
Payments of senior notes	0	(276,951)	(250,000)
Proceeds from issuance of senior notes	0	694,662	298,050
Dividend payments	(142,417)	(118,529)	(89,008)
Payments of deferred debt issuance costs	0	(1,720)	(4,471)
Issuance of shares under stock-based compensation programs, net	16,840	(16,216)	28,825
Net cash provided by (used in) financing activities	(206,125)	335,156	31,170
Net increase in cash, cash equivalents and restricted cash	113,636	99,487	29,760
Cash, cash equivalents and restricted cash:
Beginning of year	603,459	503,972	474,212
End of year	717,095	603,459	503,972
Reconciliation of cash, cash equivalents and restricted cash:
Total cash, cash equivalents and restricted cash	717,095	603,459	503,972
Homebuilding:
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Inventory impairments	121,875	1,600	0
Loss on debt retirement	0	23,571	0
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	696,075	485,839	411,362
Restricted cash	3,143	12,799	15,343
Financial Services:
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	17,877	104,821	77,267
Housing completed or under construction
Net changes in assets and liabilities:
Housing completed or under construction and land under development	186,265	(431,926)	(449,882)
Land and land under development
Net changes in assets and liabilities:
Housing completed or under construction and land under development	$ (95,402)	$ (502,781)	$ (20,265)