Fair Value of Financial Instruments, Derivatives and Fair Value Disclosures (Fair Values of Assets and Liabilities Measured on Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Interest Rate Swaps and Collar [Member] | Fair Value, Measurements, Recurring [Member]
Derivative liability	$ (12,841)
Interest Rate Swaps and Collar [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative liability	$ (12,841)
Interest Rate Cap/Collar [Member] | Fair Value, Measurements, Recurring [Member]
Derivative Asset		$ 1,164
Interest Rate Cap/Collar [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset		1,164
Interest Rate Swap [Member] | Fair Value, Measurements, Recurring [Member]
Derivative liability		(2,629)
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative liability		$ (2,629)