Interest Rate Derivatives and Hedging Activities (Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance) (Details) - Cash Flow Hedging - Interest rate swaps, net - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Amount of loss recognized in accumulated other comprehensive income (loss) from interest rate derivatives (effective portion)	$ (2,344)	$ (2,847)	$ (16)
Amount of gain (loss) recognized in gain (loss) on derivative instruments (ineffective portion, reclassifications of missed forecasted transactions and amounts excluded from effectiveness testing)	(4)	1	5
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of loss reclassified from accumulated other comprehensive income (loss) into income as interest expense (effective portion)	$ (2,167)	$ (2,160)	$ (1,336)