Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Activities:
Net income	$ 22,249	$ 9,563
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation expense	595	2,987
Depreciation and amortization	1,328	1,073
Inventory impairments	4,850
Other-than-temporary impairment of marketable securities	101	431
Loss (gain) on sale of marketable securities	(561)	915
Deferred income tax expense	3,220	1,788
Net changes in assets and liabilities:
Restricted cash	(451)	401
Trade and other receivables	7,326	(15,251)
Mortgage loans held-for-sale	41,401	33,477
Prepaid expenses and other assets	(2,407)	911
Accounts payable and accrued liabilities	8,071	(4,234)
Net cash provided by (used in) operating activities	93,886	(14,985)
Investing Activities:
Purchases of marketable securities	(5,361)	(5,482)
Sales of marketable securities	4,983	20,600
Purchases of property and equipment	(1,122)	(1,944)
Net cash provided by (used in) investing activities	(1,500)	13,174
Financing Activities:
Payments on mortgage repurchase facility, net	(43,943)	(28,390)
Dividend payments	(12,897)	(12,252)
Proceeds from exercise of stock options	1,607
Net cash used in financing activities	(55,233)	(40,642)
Net increase (decrease) in cash and cash equivalents	37,153	(42,453)
Cash and cash equivalents:
Beginning of period	282,909	180,988
End of period	320,062	138,535
Housing Completed or Under Construction [Member]
Net changes in assets and liabilities:
Housing completed or under construction	(20,866)	(115,357)
Land and land under development	(20,866)	(115,357)
Land and Land Under Development [Member]
Net changes in assets and liabilities:
Housing completed or under construction	29,030	68,311
Land and land under development	$ 29,030	$ 68,311