Derivative Instruments - Interest Rate Swap Instruments (Details) - Designated as Hedging Instrument - London Interbank Offered Rate (LIBOR) $ in Thousands	Mar. 31, 2020 USD ($)
Interest Rate Swap 1
Derivative [Line Items]
Strike Rate	1.97%
Derivative Asset, Notional Amount	$ 750,000
Interest Rate Swap 2
Derivative [Line Items]
Strike Rate	1.74%
Derivative Asset, Notional Amount	$ 750,000
Interest Rate Swap 3
Derivative [Line Items]
Strike Rate	1.59%
Derivative Asset, Notional Amount	$ 1,100,000
Interest Rate Swap 4
Derivative [Line Items]
Strike Rate	1.63%
Derivative Asset, Notional Amount	$ 595,000
Interest Rate Swap 5
Derivative [Line Items]
Strike Rate	2.86%
Derivative Asset, Notional Amount	$ 400,000
Interest Rate Swap 6
Derivative [Line Items]
Strike Rate	2.23%
Derivative Asset, Notional Amount	$ 800,000
Interest Rate Swap 7
Derivative [Line Items]
Strike Rate	2.85%
Derivative Asset, Notional Amount	$ 400,000
Interest Rate Swap 8
Derivative [Line Items]
Strike Rate	2.86%
Derivative Asset, Notional Amount	$ 400,000
Interest Rate Swap 9
Derivative [Line Items]
Strike Rate	1.30%
Derivative Asset, Notional Amount	$ 450,000
Interest Rate Swap 10
Derivative [Line Items]
Strike Rate	2.13%
Derivative Asset, Notional Amount	$ 550,000
Interest Rate Swap 11
Derivative [Line Items]
Strike Rate	2.99%
Derivative Asset, Notional Amount	$ 325,000
Interest Rate Swap 12
Derivative [Line Items]
Strike Rate	2.99%
Derivative Asset, Notional Amount	$ 595,000
Interest Rate Swap 13
Derivative [Line Items]
Strike Rate	1.47%
Derivative Asset, Notional Amount	$ 450,000
Interest Rate Swap 14
Derivative [Line Items]
Strike Rate	2.90%
Derivative Asset, Notional Amount	$ 1,100,000
Interest Rate Swap 15
Derivative [Line Items]
Strike Rate	2.23%
Derivative Asset, Notional Amount	$ 550,000
Interest Rate Swap 16
Derivative [Line Items]
Strike Rate	2.90%
Derivative Asset, Notional Amount	$ 400,000
Interest Rate Swap 17
Derivative [Line Items]
Strike Rate	3.14%
Derivative Asset, Notional Amount	$ 400,000
Interest Rate Swap 18
Derivative [Line Items]
Strike Rate	3.16%
Derivative Asset, Notional Amount	$ 400,000