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Derivatives and Hedging Instruments - Narrative (Details)	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2020 GBP (£) instrument	Mar. 31, 2020 USD ($) instrument
Reclassification out of Accumulated Other Comprehensive Income
Derivative [Line Items]
Loss reclassified from OCI into income (loss)	$ 2,500,000
Forward contracts
Derivative [Line Items]
Net derivative gain (loss) included in OCI expected to be reclassified into earnings	(100,000)
Gains or losses were reclassified from OCI into earnings	$ 0	$ 0
Forward contracts \| Derivatives Designated as Hedging Instruments
Derivative [Line Items]
Derivative instrument, notional amount				$ 6,300,000
Interest rate swap agreements \| Cash Flow Hedging
Derivative [Line Items]
Derivative instrument, notional amount				$ 327,900,000
Number of interest rate derivative held \| instrument			4	4
Interest rate cap contracts \| The 2019 Cap
Derivative [Line Items]
Derivative instrument, notional amount			£ 400,000,000.0	$ 435,100,000
Interest rate cap contracts \| Cash Flow Hedging
Derivative [Line Items]
Derivative instrument, notional amount				$ 876,400,000
Number of interest rate derivative held \| instrument			2	2
Interest rate cap contracts \| Cash Flow Hedging \| 2018 Caps
Derivative [Line Items]
Number of interest rate derivative held \| instrument			2	2
Interest rate cap contracts \| Cash Flow Hedging \| The 2020 Caps
Derivative [Line Items]
Derivative instrument, notional amount			£ 350,000,000.0	$ 441,300,000
Minimum \| Not Designated as Hedging Instrument \| Cash Flow Hedging
Derivative [Line Items]
Term of contract (years)	1 month
Maximum \| Not Designated as Hedging Instrument \| Cash Flow Hedging
Derivative [Line Items]
Term of contract (years)	3 months