Real Estate Inventories - Additional Details (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Inventory Disclosure [Abstract]
Home sales impairments	$ 10,000	$ 0	$ 0	$ 0	$ 900	$ 0	$ 1,300	$ 0	$ 10,000	$ 2,200	$ 2,350
Number of Homebuilding Projects Impaired									2	1	2
Impairment of Real Estate									$ 10,000	$ 2,200	$ 3,500