Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Operating Activities:
Net income	$ 50,580	$ 53,392	$ 145,723	$ 156,055
Adjustments to reconcile net income to net cash used in operating activities:
Stock-based compensation expense			18,178	8,500
Depreciation and amortization			15,478	15,406
Inventory impairments	0	11,098	610	11,848
Net gain on marketable equity securities	(767)	(3,004)	(7,934)	(3,129)
Amortization of discount / premiums on marketable debt securities, net			0	(366)
Deferred income tax expense			9,488	4,092
Net changes in assets and liabilities:
Trade and other receivables			(4,682)	(7,049)
Mortgage loans held-for-sale, net			32,191	23,278
Prepaid and other assets			(3,889)	(12,328)
Accounts payable and accrued liabilities			23,929	26,067
Net cash used in operating activities			(33,118)	(59,246)
Investing Activities:
Purchases of marketable securities			(10,340)	(17,183)
Maturities of marketable securities			0	50,000
Sales of marketable securities			6,277	13,310
Purchases of property and equipment			(20,128)	(19,899)
Net cash provided by (used in) investing activities			(24,191)	26,228
Financing Activities:
Payments on mortgage repurchase facility, net			(26,344)	(21,556)
Dividend payments			(54,337)	(50,733)
Issuance of shares under stock-based compensation programs, net			16,304	9,859
Net cash used in financing activities			(64,377)	(62,430)
Net decrease in cash, cash equivalents and restricted cash			(121,686)	(95,448)
Cash, cash equivalents and restricted cash:
Beginning of period			470,139	514,240
End of period	348,453	418,792	348,453	418,792
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	348,453	418,792	348,453	418,792
End of period	348,453	418,792	348,453	418,792
Homebuilding Segment [Member]
Adjustments to reconcile net income to net cash used in operating activities:
Inventory impairments	(0)	11,098	610	11,848
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	285,338	360,947	285,338	360,947
Restricted cash	16,325	7,866	16,325	7,866
Financial Services Segment [Member]
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	$ 46,790	$ 49,979	46,790	49,979
Housing Completed or Under Construction [Member]
Net changes in assets and liabilities:
Housing completed or under construction and land under development			(251,749)	(131,657)
Land and Land Under Development [Member]
Net changes in assets and liabilities:
Housing completed or under construction and land under development			$ (10,461)	$ (149,963)