Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Activities:
Net income	$ 40,550	$ 38,764
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation expense	4,251	1,251
Depreciation and amortization	4,878	4,636
Inventory impairments	610	550
Net (gain) loss on marketable equity securities	(4,840)	1,153
Amortization of discount / premiums on marketable debt securities, net		(182)
Deferred income tax expense	2,696	423
Net changes in assets and liabilities:
Trade and other receivables	(13,771)	(3,261)
Mortgage loans held-for-sale, net	38,401	24,956
Prepaid and other assets	1,085	389
Accounts payable and accrued liabilities	(3,153)	6,765
Net cash provided by (used in) operating activities	54,348	(61,486)
Investing Activities:
Purchases of marketable securities	(4,785)	(8,761)
Sales of marketable securities	4,737	8,700
Purchases of property and equipment	(6,386)	(6,316)
Net cash used in investing activities	(6,434)	(6,377)
Financing Activities:
Payments on mortgage repurchase facility, net	(31,959)	(22,214)
Dividend payments	(17,115)	(16,865)
Proceeds from exercise of stock options	7,087	282
Net cash used in financing activities	(41,987)	(38,797)
Net increase (decrease) in cash, cash equivalents and restricted cash	5,927	(106,660)
Cash, cash equivalents and restricted cash:
Beginning of period	470,139	514,240
End of period	476,066	407,580
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	476,066	407,580
End of period	476,066	407,580
Homebuilding Segment [Member]
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Inventory impairments	610	550
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	416,374	352,868
Restricted cash	8,136	6,198
Financial Services Segment [Member]
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	51,556	48,514
Housing Completed or Under Construction [Member]
Net changes in assets and liabilities:
Housing completed or under construction and land under development	2,137	(65,378)
Land and Land Under Development [Member]
Net changes in assets and liabilities:
Housing completed or under construction and land under development	$ (18,496)	$ (71,552)