Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flows from operating activities:
Net income	$ 166,049	$ 102,923
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,036	5,699
Equity-based compensation expense	9,509	10,589
Contract land deposit (recoveries) impairments, net	(215)	1,717
Gain on sale of loans, net	(31,320)	(23,231)
Mortgage loans closed	(1,009,675)	(784,928)
Mortgage loans sold and principal payments on mortgage loans held for sale	1,045,538	955,647
Distribution of earnings from unconsolidated joint ventures	1,383	2,388
Net change in assets and liabilities:
Increase in inventory	(98,193)	(140,334)
Decrease in contract land deposits	8,753	8,424
(Increase) decrease in receivables	(4,585)	667
Decrease in accounts payable and accrued expenses	(25,035)	(37,550)
Increase in customer deposits	17,453	26,117
Other, net	(6,670)	(19,866)
Net cash provided by operating activities	78,028	108,262
Cash flows from investing activities:
Investments in and advances to unconsolidated joint ventures	0	(455)
Distribution of capital from unconsolidated joint ventures	2,482	2,162
Purchase of property, plant and equipment	(3,113)	(5,161)
Proceeds from the sale of property, plant and equipment	195	177
Net cash used in investing activities	(436)	(3,277)
Cash flows from financing activities:
Purchase of treasury stock	(357,242)	(85,547)
Proceeds from the exercise of stock options	40,804	75,265
Net cash used in financing activities	(316,438)	(10,282)
Net (decrease) increase in cash, restricted cash, and cash equivalents	(238,846)	94,703
Cash, restricted cash, and cash equivalents, beginning of the period	689,557	416,037
Cash, restricted cash, and cash equivalents, end of the period	450,711	510,740
Supplemental disclosures of cash flow information:
Interest paid during the period, net of interest capitalized	11,977	11,536
Income taxes paid during the period, net of refunds	$ 3,333	$ 7,079