Homebuilding Accrued Liabilities and Financial Services Accounts Payable and Accrued Liabilities - Homebuilding Accrued Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Warranty accrual	$ 32,097	$ 30,458	$ 31,386	$ 29,870	$ 29,349	$ 28,262
Lease liability			32,495
Homebuilding:
Segment Reporting Information [Line Items]
Customer and escrow deposits	59,468		39,001
Warranty accrual	32,097		31,386
Accrued compensation and related expenses	48,226		45,003
Lease liability	31,637		30,830
Accrued interest	13,825		27,734
Construction defect claim reserves	8,479		8,196
Land development and home construction accruals	8,630		9,750
Other accrued liabilities	56,899		54,040
Accrued and other liabilities	$ 259,261		$ 245,940