Supplemental Guarantor Information (Supplemental Condensed Consolidated Balance Sheet) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Assets
Cash and cash equivalents	$ 450,973	$ 55,436	$ 38,115
Cash held in escrow	22,497	35,308
Accounts receivable	23,087	27,438
Inventories	2,074,509	1,995,549
Mortgage loans held for sale	141,846	185,246
Prepaid expenses and other assets	121,017	124,008
Deferred tax assets, net	11,110	10,589
Property and equipment, net	35,004	35,998
Goodwill	30,395	30,395
Total assets	2,910,438	2,499,967
Liabilities:
Accounts payable	40,170	84,794
Accrued expenses and other liabilities	230,875	213,975
Notes payable	899,166	896,704
Revolving line of credit	521,900	68,700
Mortgage repurchase facilities	133,794	174,095
Total liabilities	1,825,905	1,438,268
Stockholders' equity:	1,084,533	1,061,699	875,406	$ 859,359
Total liabilities and stockholders' equity	2,910,438	2,499,967
Parent [Member]
Assets
Cash and cash equivalents	401,069	1,577	643
Accounts receivable	8,000	15,363
Investment in consolidated subsidiaries	2,097,867	1,996,703
Prepaid expenses and other assets	9,449	9,539
Deferred tax assets, net	11,110	10,589
Property and equipment, net	15,240	15,256
Total assets	2,542,735	2,049,027
Liabilities:
Accounts payable	588	(13)
Accrued expenses and other liabilities	44,919	28,214
Notes payable	890,795	890,427
Revolving line of credit	521,900	68,700
Total liabilities	1,458,202	987,328
Stockholders' equity:	1,084,533	1,061,699
Total liabilities and stockholders' equity	2,542,735	2,049,027
Guarantor Subsidiaries [Member]
Assets
Cash and cash equivalents	6,404		2,596
Cash held in escrow	22,497	35,308
Accounts receivable	13,684	12,327
Inventories	2,074,509	1,995,549
Prepaid expenses and other assets	95,096	101,321
Property and equipment, net	18,595	19,614
Goodwill	30,395	30,395
Total assets	2,261,180	2,194,514
Liabilities:
Accounts payable	38,963	83,853
Accrued expenses and other liabilities	189,848	173,403
Notes payable	8,371	6,277
Total liabilities	237,182	263,533
Stockholders' equity:	2,023,998	1,930,981
Total liabilities and stockholders' equity	2,261,180	2,194,514
Non Guarantor Subsidiaries [Member]
Assets
Cash and cash equivalents	43,500	53,859	$ 34,876
Accounts receivable	19,003	(252)
Mortgage loans held for sale	141,846	185,246
Prepaid expenses and other assets	16,472	13,148
Property and equipment, net	1,169	1,128
Total assets	221,990	253,129
Liabilities:
Accounts payable	619	954
Accrued expenses and other liabilities	13,708	12,358
Mortgage repurchase facilities	133,794	174,095
Total liabilities	148,121	187,407
Stockholders' equity:	73,869	65,722
Total liabilities and stockholders' equity	221,990	253,129
Elimination Entries [Member]
Assets
Accounts receivable	(17,600)
Investment in consolidated subsidiaries	(2,097,867)	(1,996,703)
Total assets	(2,115,467)	(1,996,703)
Liabilities:
Accrued expenses and other liabilities	(17,600)
Total liabilities	(17,600)
Stockholders' equity:	(2,097,867)	(1,996,703)
Total liabilities and stockholders' equity	$ (2,115,467)	$ (1,996,703)