Derivative Financial Instruments - Schedule of LIBOR interest rate caps (Details) - USD ($)	Dec. 31, 2020	Nov. 01, 2020	Oct. 30, 2020	Jul. 01, 2020	Mar. 02, 2020	Jan. 28, 2020	Jan. 10, 2020	Dec. 31, 2019	May 15, 2019	Dec. 11, 2018	Jul. 16, 2018	Mar. 07, 2018	Nov. 28, 2017	Sep. 18, 2017	Jun. 23, 2017	Feb. 07, 2017	Jun. 17, 2016	Feb. 25, 2016
Derivative [Line Items]
Notional Amount	$ 874,606,000							$ 496,642,000
Interest rate caps
Derivative [Line Items]
Notional Amount			$ 100,000
LIBOR | Interest rate caps
Derivative [Line Items]
Notional Amount		$ 84,375,000		$ 100,000,000	$ 100,000,000	$ 50,000,000	$ 50,000,000		$ 100,000,000	$ 50,000,000	$ 50,000,000	$ 50,000,000	$ 50,000,000	$ 50,000,000	$ 50,000,000	$ 50,000,000	$ 70,000,000	$ 75,000,000
Cap Interest Rate				0.50%	1.50%	1.75%	1.75%		2.50%	2.75%	2.50%	2.25%	1.50%	1.50%	1.50%	1.50%	1.00%	1.50%
Premium Paid	$ 2,816,000	$ 91,000		$ 232,000	$ 111,000	$ 62,000	$ 87,000		$ 288,000	$ 210,000	$ 319,000	$ 310,000	$ 359,000	$ 199,000	$ 154,000	$ 187,000	$ 150,000	$ 57,000
SOFR | Interest rate caps
Derivative [Line Items]
Cap Interest Rate		1.84%