Supplemental Guarantor Information (Balance Sheet) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and equivalents	$ 1,217,913	$ 1,110,088
Restricted cash	33,543	23,612
Total cash, cash equivalents, and restricted cash	1,251,456	1,133,700	$ 306,168	$ 723,248
House and land inventory	7,680,614	7,253,353
Land held for sale	24,009	36,849
Residential mortgage loans available-for-sale	508,967	461,354
Investments in unconsolidated entities	59,766	54,590
Other assets	895,686	830,359
Intangible assets	124,992	127,192
Deferred tax assets, net	170,107	275,579
Investments in subsidiaries and intercompany accounts, net	0	0
Total assets	10,715,597	10,172,976
Liabilities:
Accounts payable, customer deposits, accrued and other liabilities	2,129,711	1,967,136
Income tax liabilities	36,093	11,580
Financial Services debt	326,573	348,412
Notes payable	2,765,040	3,028,066
Total liabilities	5,257,417	5,355,194
Total shareholders’ equity	5,458,180	4,817,782	4,154,026	4,659,363
Total liabilities and shareholders' equity	10,715,597	10,172,976
Parent Company [Member]
ASSETS
Cash and equivalents	0	0
Restricted cash	0	0
Total cash, cash equivalents, and restricted cash	0	0	0	0
House and land inventory	0	0
Land held for sale	0	0
Residential mortgage loans available-for-sale	0	0
Investments in unconsolidated entities	0	0
Other assets	8,172	66,154
Intangible assets	0	0
Deferred tax assets, net	182,461	282,874
Investments in subsidiaries and intercompany accounts, net	8,103,191	7,557,245
Total assets	8,293,824	7,906,273
Liabilities:
Accounts payable, customer deposits, accrued and other liabilities	87,892	90,158
Income tax liabilities	36,093	11,580
Financial Services debt	0	0
Notes payable	2,711,659	2,986,753
Total liabilities	2,835,644	3,088,491
Total shareholders’ equity	5,458,180	4,817,782
Total liabilities and shareholders' equity	8,293,824	7,906,273
Guarantor Subsidiaries [Member]
ASSETS
Cash and equivalents	1,026,743	906,961
Restricted cash	31,328	22,406
Total cash, cash equivalents, and restricted cash	1,058,071	929,367	157,801	611,185
House and land inventory	7,554,662	7,157,665
Land held for sale	24,009	36,849
Residential mortgage loans available-for-sale	0	0
Investments in unconsolidated entities	59,266	54,045
Other assets	688,996	579,452
Intangible assets	124,992	127,192
Deferred tax assets, net	0	0
Investments in subsidiaries and intercompany accounts, net	1,081,472	500,138
Total assets	10,591,468	9,384,708
Liabilities:
Accounts payable, customer deposits, accrued and other liabilities	1,781,893	1,598,265
Income tax liabilities	0	0
Financial Services debt	0	0
Notes payable	53,381	40,776
Total liabilities	1,835,274	1,639,041
Total shareholders’ equity	8,756,194	7,745,667
Total liabilities and shareholders' equity	10,591,468	9,384,708
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and equivalents	191,170	203,127
Restricted cash	2,215	1,206
Total cash, cash equivalents, and restricted cash	193,385	204,333	148,367	112,063
House and land inventory	125,952	95,688
Land held for sale	0	0
Residential mortgage loans available-for-sale	508,967	461,354
Investments in unconsolidated entities	500	545
Other assets	198,518	184,753
Intangible assets	0	0
Deferred tax liability, net	(12,354)	(7,295)
Investments in subsidiaries and intercompany accounts, net	9,279,403	8,231,342
Total assets	10,294,371	9,170,720
Liabilities:
Accounts payable, customer deposits, accrued and other liabilities	259,926	278,713
Income tax liabilities	0	0
Financial Services debt	326,573	348,412
Notes payable	0	537
Total liabilities	586,499	627,662
Total shareholders’ equity	9,707,872	8,543,058
Total liabilities and shareholders' equity	10,294,371	9,170,720
Eliminating Entries [Member]
ASSETS
Cash and equivalents	0	0
Restricted cash	0	0
Total cash, cash equivalents, and restricted cash	0	0	$ 0	$ 0
House and land inventory	0	0
Land held for sale	0	0
Residential mortgage loans available-for-sale	0	0
Investments in unconsolidated entities	0	0
Other assets		0
Intangible assets	0	0
Deferred tax assets, net	0	0
Investments in subsidiaries and intercompany accounts, net	(18,464,066)	(16,288,725)
Total assets	(18,464,066)	(16,288,725)
Liabilities:
Accounts payable, customer deposits, accrued and other liabilities	0	0
Income tax liabilities	0	0
Financial Services debt	0	0
Notes payable	0	0
Total liabilities	0	0
Total shareholders’ equity	(18,464,066)	(16,288,725)
Total liabilities and shareholders' equity	$ (18,464,066)	$ (16,288,725)