Homebuilding Accrued and Other Liabilities and Financial Services Accounts Payable and Accrued Liabilities - Financial Services Accounts Payable and Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Insurance reserves	$ 74,003	$ 70,054	$ 61,450	$ 60,415
Financial Services:
Segment Reporting Information [Line Items]
Insurance reserves	65,259	61,575
Accounts payable and other accrued liabilities	36,466	34,055
Total accounts payable and accrued liabilities	$ 101,725	$ 95,630