Derivatives and Hedging Activities - Derivatives Not Designated as Hedging Instruments (Details)	12 Months Ended
	Dec. 31, 2019 USD ($) derivative	Dec. 31, 2018 USD ($) derivative	Dec. 31, 2017 USD ($)	Feb. 06, 2019 USD ($)
Derivative [Line Items]
Derivative assets	$ 250,000	$ 544,000
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	$ 400,000,000.0			$ 900,000,000.0
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Number of Instruments | derivative	0	1
Notional amount		$ 50,700,000
Amount of (loss) gain recognized in income on cash flow hedges	$ (100,000)	400,000	$ 3,000,000.0
Rent and Tenant Receivables and Other Assets, Net [Member] | Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative assets		$ 544,000