Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating Activities:
Net income	$ 98,938	$ 50,580	$ 220,094	$ 145,723
Adjustments to reconcile net income to net cash provided by operating activities:
Stock-based compensation expense			18,536	18,178
Depreciation and amortization			18,881	15,478
Inventory impairments			0	610
Net (gain) loss on marketable equity securities	0	(767)	8,285	(7,934)
Deferred income tax expense			8,493	9,488
Net changes in assets and liabilities:
Trade and other receivables			(17,512)	(4,682)
Mortgage loans held-for-sale, net			36,515	32,191
Prepaid and other assets			(20,314)	(3,889)
Accounts payable and accrued and other liabilities			35,023	23,929
Net Cash Provided by (Used in) Operating Activities			29,442	(33,118)
Investing Activities:
Purchases of marketable securities			(10,804)	(10,340)
Sales of marketable securities			59,266	6,277
Purchases of property and equipment			(20,885)	(20,128)
Net cash provided by (used in) investing activities			27,577	(24,191)
Financing Activities:
Repayment of senior notes			(250,000)	0
Proceeds from issuance of senior notes			298,050	0
Dividend payments			(63,056)	(54,337)
Issuance of shares under stock-based compensation programs, net			29,974	16,304
Net cash used in financing activities			(8,787)	(64,377)
Net increase (decrease) in cash, cash equivalents and restricted cash			48,232	(121,686)
Cash, cash equivalents and restricted cash:
Beginning of period			474,212	470,139
End of period	522,444	348,453	522,444	348,453
Reconciliation of cash, cash equivalents and restricted cash:
Total cash, cash equivalents and restricted cash	522,444	348,453	522,444	348,453
Mortgage Repurchase Facility
Financing Activities:
Payments on homebuilding line of credit, net			(18,755)	(26,344)
Homebuilding Line of Credit Facility
Financing Activities:
Payments on homebuilding line of credit, net			(5,000)	0
Homebuilding:
Adjustments to reconcile net income to net cash provided by operating activities:
Inventory impairments	0	0	0	610
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	432,277	285,338	432,277	285,338
Restricted cash	19,732	16,325	19,732	16,325
Financial Services:
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	$ 70,435	$ 46,790	70,435	46,790
Housing Completed or Under Construction
Net changes in assets and liabilities:
Housing completed or under construction and land under development			(387,269)	(251,749)
Land and Land Under Development
Net changes in assets and liabilities:
Housing completed or under construction and land under development			$ 108,710	$ (10,461)