Derivative Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Fair value adjustment of interest rate Caps	$ 2,846	$ 0	$ 0
Interest Rate Cap [Member] | Interest Expense [Member]
Fair value adjustment of interest rate Caps	(2,846)	0	$ 0
Acounts Receivable Prepaids and Other Assets [Member] | Interest Rate Cap [Member]
Derivative, Fair Value, Net	$ 2,596	$ 0