Fair Value of Financial Instruments, Derivatives and Fair Value Disclosures (Effect of Cash Flow Hedging Relationships on Consolidated Statements of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Effective portion of gain/(loss) reclassified from accumulated other comprehensive loss	$ 2,113	$ 1,953	$ 5,667	$ 8,434
Interest Rate Cap/Collar [Member]
Effective portion of gain/(loss) reclassified from accumulated other comprehensive loss		4	99	4
Interest Rate Swap [Member]
Effective portion of gain/(loss) reclassified from accumulated other comprehensive loss	480	(3)	838	(3)
Interest Expense [Member]
Effective portion of gain/(loss) reclassified from accumulated other comprehensive loss	$ 480	$ 1	$ 937	$ 1