Deferred Costs and Other Intangibles, Net - Components (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Acquired Indefinite-lived Intangible Assets
Deferred leasing costs	$ 3,738	$ 11,912
Deferred financing costs	11,244	11,246
Intangible assets:
Intangible assets	17,082	25,258
Less: accumulated amortization	(10,242)	(12,572)
Total	6,840	12,686
Database
Intangible assets:
Intangible assets	$ 2,100	$ 2,100