Commitments and Contingencies - Additional Information (Details) $ in Thousands			106 Months Ended
	Aug. 31, 2017	Jun. 10, 2016 USD ($)	Dec. 31, 2018 USD ($) a	Mar. 08, 2010 ft²
Loss Contingencies [Line Items]
Community development related to claim			$ 220,200
Operating Leases, Future Minimum Payments Due			189,428
Minimum future sublease rentals			$ 1,200
Corporate Office Lease
Loss Contingencies [Line Items]
Operating Lease, Area of Leased Space | ft²				258,000
Operating Lease, Additional Area of Leased Space | a			72,000
Monthly Rent			$ 900
Percentage of Annual Escalations of Lease Rent			2.50%
Operating Leases, Future Minimum Payments Due			$ 150,600
Term of Lease	12 years
OCD vs ICF Emergency
Loss Contingencies [Line Items]
Loss contingency damages sought value		$ 200,800
Road Home Contract
Loss Contingencies [Line Items]
Contract term, period		3 years
Contract award, value		$ 912,000