Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Operating Activities:
Net income	$ 38,764	$ 22,249
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Stock-based compensation expense	1,251	595
Depreciation and amortization	4,636	1,328
Inventory impairments	550	4,850
Other-than-temporary impairment of marketable securities		101
Net gain on sale of available-for-sale marketable securities		(561)
Net loss on marketable equity securities	1,153
Amortization of discount / premiums on marketable debt securities, net	(182)
Deferred income tax expense	423	3,220
Net changes in assets and liabilities:
Trade and other receivables	(3,261)	7,326
Mortgage loans held-for-sale	24,956	41,401
Prepaid and other assets	389	(2,407)
Accounts payable and accrued liabilities	6,765	8,071
Net cash provided by (used in) operating activities	(61,486)	94,337
Investing Activities:
Purchases of marketable securities	(8,761)	(5,361)
Sales of marketable securities	8,700	4,983
Purchases of property and equipment	(6,316)	(1,122)
Net cash used in investing activities	(6,377)	(1,500)
Financing Activities:
Payments on mortgage repurchase facility, net	(22,214)	(43,943)
Dividend payments	(16,865)	(12,897)
Proceeds from exercise of stock options	282	1,607
Net cash used in financing activities	(38,797)	(55,233)
Net increase (decrease) in cash, cash equivalents and restricted cash	(106,660)	37,604
Cash, cash equivalents and restricted cash:
Beginning of period	514,240	286,687
End of period	407,580	324,291
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	407,580	324,291
End of period	407,580	324,291
Homebuilding Segment [Member]
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Inventory impairments	550	4,850
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	352,868	296,731
Restricted cash	6,198	4,229
Financial Services Segment [Member]
Reconciliation of cash, cash equivalents and restricted cash:
Cash and cash equivalents	48,514	23,331
Housing Completed or Under Construction [Member]
Net changes in assets and liabilities:
Housing completed or under construction and land under development	(65,378)	(20,866)
Land and Land Under Development [Member]
Net changes in assets and liabilities:
Housing completed or under construction and land under development	$ (71,552)	$ 29,030

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The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

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Amount of cash inflow from exercise of stock options granted under share-based compensation arrangement.

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Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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