Derivatives and Hedging Activities - Narrative (Details) $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2021 USD ($) lease_renewal_option interest_rate_cap	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2021 USD ($) lease_renewal_option interest_rate_cap	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amount estimated to be reclassified as a reduction to interest expense over next 12 months							$ 26.3
Derivative notional amount	$ 1,537.5						1,537.5		$ 1,200.0
Amount of unrealized losses recorded in OCI	(6.5)	$ (0.2)	$ (6.4)	$ (3.3)	$ (7.3)	$ 25.2	(13.1)	$ 14.6
Derivatives not designated as hedging instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Derivative notional amount	435.0						$ 435.0
Amount of unrealized losses recorded in OCI	$ 55.0
Interest Rate Swap
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Number of interest rate swaps | lease_renewal_option	9						9
Derivative notional amount	$ 435.0						$ 435.0
Interest Rate Swap | Derivatives in cash flow hedging relationships
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Derivative notional amount	$ 1,200.0						$ 1,200.0
Three Pay-fixed Interest Rate Swaps | LIBOR | Minimum
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Variable interest rate of derivative instrument (percent)	0.75%						0.75%
Three Pay-fixed Interest Rate Swaps | Derivatives not designated as hedging instruments | LIBOR | Minimum
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Variable interest rate of derivative instrument (percent)	1.00%						1.00%
Three Receive-fixed Interest Rate Swaps | Derivatives not designated as hedging instruments | LIBOR | Minimum
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Variable interest rate of derivative instrument (percent)	1.00%						1.00%
Interest Rate Cap
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Number of interest rate swaps | interest_rate_cap	2						2
Interest Rate Cap | Derivatives in cash flow hedging relationships
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Derivative notional amount	$ 337.5						$ 337.5