Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from operating activities:
Net income	$ 369,223	$ 250,800
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,024	11,494
Equity-based compensation expense	28,104	21,467
Contract land deposit impairments, net	44	3,567
Gain on sale of loans, net	(58,891)	(47,474)
Mortgage loans closed	(2,223,302)	(1,772,432)
Mortgage loans sold and principal payments on mortgage loans held for sale	2,229,894	1,936,118
Distribution of earnings from unconsolidated joint ventures	2,849	2,643
Net change in assets and liabilities:
Increase in inventory	(187,416)	(272,851)
Decrease in contract land deposits	9,333	17,872
Increase in receivables	(10,417)	(1,674)
Decrease in accounts payable and accrued expenses	(11,332)	(3,013)
Increase in customer deposits	22,000	43,448
Other, net	(10,663)	(11,757)
Net cash provided by operating activities	169,450	178,208
Cash flows from investing activities:
Investments in and advances to unconsolidated joint ventures	(284)	(455)
Distribution of capital from unconsolidated joint ventures	6,027	5,238
Purchase of property, plant and equipment	(9,251)	(9,784)
Proceeds from the sale of property, plant and equipment	425	472
Net cash used in investing activities	(3,083)	(4,529)
Cash flows from financing activities:
Purchase of treasury stock	(483,538)	(159,506)
Proceeds from the exercise of stock options	86,094	117,966
Net cash used in financing activities	(397,444)	(41,540)
Net (decrease) increase in cash, restricted cash, and cash equivalents	(231,077)	132,139
Cash, restricted cash, and cash equivalents, beginning of the period	689,557	416,037
Cash, restricted cash, and cash equivalents, end of the period	458,480	548,176
Supplemental disclosures of cash flow information:
Interest paid during the period, net of interest capitalized	12,151	11,293
Income taxes paid during the period, net of refunds	$ 86,269	$ 99,370