Derivative Financial Instruments Derivative Financial Instruments - Schedule of LIBOR interest rate caps (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Jul. 01, 2020	Mar. 01, 2020	Jan. 28, 2020	Jan. 10, 2020	Dec. 31, 2019	May 15, 2019	Dec. 11, 2018
Derivative [Line Items]
Notional Amount	$ 790,594					$ 496,642
Interest rate caps | LIBOR
Derivative [Line Items]
Notional Amount	450,000
Premium Paid	990
Not designated as accounting hedges
Derivative [Line Items]
Notional Amount	200,000					350,000
Not designated as accounting hedges | Interest rate caps
Derivative [Line Items]
Notional Amount	150,000					250,000
Not designated as accounting hedges | Interest rate caps | LIBOR
Derivative [Line Items]
Notional Amount							$ 100,000	$ 50,000
Strike Rate							2.50%	2.75%
Premium Paid							$ 288	$ 210
Designated as accounting hedge | Interest rate caps
Derivative [Line Items]
Notional Amount	$ 300,000					$ 0
Designated as accounting hedge | Interest rate caps | LIBOR
Derivative [Line Items]
Notional Amount		$ 100,000	$ 100,000	$ 50,000	$ 50,000
Strike Rate		0.50%	1.50%	1.75%	1.75%
Premium Paid		$ 232	$ 111	$ 62	$ 87