Derivatives and Hedging Activities - Narrative (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Derivative [Line Items]
Reclassification of previous unrealized loss on interest rate derivatives into net income	$ 4,604,000	$ 99,000	$ 6,552,000	$ 196,000
Gain (loss) to be reclassified in next twelve months	24,400,000		24,400,000
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	400,000,000.0		400,000,000.0
Cash Flow Hedging [Member]
Derivative [Line Items]
Amount of (loss) gain recognized in income on cash flow hedges	(6,500,000)	(16,300,000)	(85,000,000.0)	(27,600,000)
Not Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	900,000,000.0		900,000,000.0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Reclassification of previous unrealized loss on interest rate derivatives into net income	$ 4,600,000	$ 100,000	$ 6,600,000	$ 200,000