Noncontrolling Interests - Additional Information (Details)		3 Months Ended
	Jun. 30, 2017 USD ($)	Mar. 31, 2019 $ / Property $ / h	Aug. 01, 2017 USD ($) $ / shares shares
Minority Interest [Line Items]
Common units transferred to acquire ownership interest in properties of noncontrolling interest holders, per share | $ / shares			$ 27.31
Amount used for calculation of OP units of net asset value	$ 2,000,000
BH Equity Portfolio
Minority Interest [Line Items]
Percentage of noncontrolling interests in joint ventures acquired	100.00%
Consideration transferred to acquire ownership interest in properties of noncontrolling interest holders	$ 51,700,000
Payment to acquire ownership interest in properties of noncontrolling interest holders	$ 49,700,000
Common units transferred to acquire ownership interest in properties of noncontrolling interest holders | shares			73,233
Value of common units transferred to acquire ownership interest in properties of noncontrolling interest holders			$ 2,000,000
BH Equity Portfolio | B H Equity
Minority Interest [Line Items]
Percentage of ownership interests in portfolio	8.40%
BH Management Services, LLC
Minority Interest [Line Items]
Property management fee percent		3.00%
Other owner approved fees, per hour | $ / h		55
BH Management Services, LLC | Minimum
Minority Interest [Line Items]
Inspection of properties fee, per unit | $ / Property		15
Construction supervision fee, percent fee		5.00%
BH Management Services, LLC | Maximum
Minority Interest [Line Items]
Inspection of properties fee, per unit | $ / Property		25
Construction supervision fee, percent fee		6.00%