Basis of Presentation and Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) Segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Jan. 01, 2019 USD ($)	Feb. 29, 2016
Property Plant And Equipment [Line Items]
Minimum percentage of taxable income distributed to shareholders	90.00%
Income tax expense	$ 312,000	$ 3,139,000	$ 5,177,000
Number of reportable segments | Segment	3
ASU 2016-02 [Member]
Property Plant And Equipment [Line Items]
Lease term, in months					12 months
Right-of-use asset				$ 4,184,000
Lease liability				$ 4,184,000
Taxable REIT Subsidiaries [Member]
Property Plant And Equipment [Line Items]
Income tax expense	$ 242,000	622,000	5,758,000
Deferred income tax expense (benefit)	$ (28,000)	$ 87,000	$ (922,000)
Minimum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets, years	5
Maximum [Member]
Property Plant And Equipment [Line Items]
Estimated useful lives of the assets, years	40