Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Operating activities
Net income	$ 15,495	$ 33,193	$ 32,612	$ 53,212
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization			6,196	5,512
Stock-based compensation expense			7,468	6,323
Loss on debt extinguishment	10,832		10,832
Deferred income taxes			428	(989)
Distributions from unconsolidated subsidiaries				7,432
Equity in income of unconsolidated subsidiaries		(11,681)		(14,849)
(Gain) loss on disposition of assets			526	230
Changes in assets and liabilities:
Cash held in escrow			(1,495)	(5,897)
Accounts receivable			(2,535)	(6,199)
Inventories			(121,734)	(124,863)
Prepaid expenses and other assets			(5,041)	(2,404)
Accounts payable			7,137	22,260
Accrued expenses and other liabilities			(18,428)	(15,634)
Mortgage loans held for sale			(8,965)	(5,026)
Net cash provided by (used in) operating activities			(92,999)	(80,892)
Investing activities
Purchases of property and equipment			(6,274)	(7,534)
Business combinations, net of acquired cash				(28,036)
Other investing activities			59	322
Net cash provided by (used in) investing activities			(6,215)	(35,248)
Financing activities
Borrowings under revolving credit facilities			767,600	305,000
Payments on revolving credit facilities			(758,100)	(175,000)
Proceeds from issuance of senior notes due 2027			500,000
Extinguishment of senior notes due 2022			(391,942)
Extinguishments of debt assumed in business combination				(94,231)
Debt issuance costs			(5,728)	(3,521)
Proceeds from issuance of insurance premium notes and other			9,301
Principal payments on insurance notes payable			(17,586)
Net proceeds from mortgage repurchase facilities			(3,805)	4,679
Net proceeds from issuances of common stock			2,663	14,309
Repurchases of common stock upon vesting of stock based compensation			(3,434)	(4,788)
Repurchases of common stock under our stock repurchase program			(1,439)
Net cash provided by (used in) financing activities			97,530	46,448
Net increase (decrease)			(1,684)	(69,692)
Cash and cash equivalents and Restricted cash, Beginning of period			36,441	93,713	$ 93,713
Cash and cash equivalents and Restricted cash, End of period	34,757	24,021	34,757	24,021	36,441
Supplemental cash flow disclosure
Cash paid for income taxes			13,111	26,323
Cash and cash equivalents and Restricted cash
Cash and cash equivalents	31,704	19,482	31,704	19,482	$ 32,902
Restricted cash (Note 6)	$ 3,053	$ 4,539	$ 3,053	$ 4,539