Insurance and Construction Defect Claim Reserves - Summary of Insurance and Defect Claim Reserves Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Movement in Liability for Future Policy Benefits [Roll Forward]
Balance at beginning of period	$ 74,003	$ 61,450	$ 70,054	$ 60,415
Expense provisions	5,388	3,586	9,671	6,504
Cash payments, net of recoveries	(3,105)	(1,155)	(3,439)	(3,038)
Balance at end of period	$ 76,286	$ 63,881	$ 76,286	$ 63,881