Consolidated Statements of Cash Flows $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Operating activities
Net income	$ 206,157	$ 112,994	$ 96,455
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	13,141	13,382	12,031
Stock-based compensation expense	18,334	15,316	13,743
Fair value of mortgage loans held for sale	(7,145)	(1,566)	(2,697)
Loss on debt extinguishment		10,832
Inventory impairment and other	2,172	4,783
Deferred income taxes	(1,861)	3,174	(4,155)
Distributions from unconsolidated subsidiaries			7,432
Equity in income of unconsolidated subsidiaries			(14,849)
Loss on disposition of assets	1,425	361	1,979
Changes in assets and liabilities:
Cash held in escrow	12,159	(10,964)	13,640
Accounts receivable	5,657	(13,974)	1,227
Inventories	94,498	(129,024)	(284,977)
Mortgage loans held for sale	(90,248)	(72,853)	(61,747)
Prepaid expenses and other assets	3,142	43,108	(24,558)
Accounts payable	22,918	(5,113)	52,560
Accrued expenses and other liabilities	60,229	(39,263)	(1,662)
Net cash provided by (used in) operating activities	340,578	(68,807)	(195,578)
Investing activities
Purchases of property and equipment	(8,522)	(16,117)	(15,803)
Business combinations, net of acquired cash			(28,036)
Proceeds from sale of intangible asset		1,730
Other investing activities	117	104	303
Net cash used in investing activities	(8,405)	(14,283)	(43,536)
Financing activities
Borrowings under revolving credit facilities	678,000	1,548,500	721,000
Payments on revolving credit facilities	(746,700)	(1,682,300)	(518,500)
Proceeds from issuance of senior notes due 2027		500,000
Extinguishment of senior notes due 2022		(391,942)
Proceeds from issuance of insurance premium notes and other	5,778	13,719	11,839
Principal payments on insurance notes payable and other	(8,769)	(20,237)	(5,371)
Extinguishments of debt assumed in business combination			(94,231)
Debt financing costs	(392)	(6,140)	(3,642)
Net proceeds from mortgage repurchase facilities	84,955	69,540	56,236
Net proceeds from issuances of common stock		79,052	30,947
Withholding of common stock upon vesting of restricted stock units	(5,100)	(3,583)	(5,484)
Repurchases of common stock under stock repurchase program		(1,439)	(10,952)
Other	(385)
Net cash provided by financing activities	7,387	105,170	181,842
Net increase (decrease)	339,560	22,080	(57,272)
Cash and cash equivalents and Restricted cash, Beginning of period	58,521	36,441	93,713
Cash and cash equivalents and Restricted cash, End of period	398,081	58,521	36,441
Supplemental cash flow disclosure
Cash paid for income taxes	48,789	26,936	39,656
Cash and cash equivalents and Restricted cash
Cash and cash equivalents	394,001	55,436	32,902
Restricted cash (Note 7)	$ 4,080	$ 3,085	$ 3,539