Interest Rate Derivatives and Hedging Activities (Narrative) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($) derivative	Mar. 31, 2015 USD ($)
Derivative [Line Items]
Loss on derivative instruments	$ 251	$ 4
Loss on derivative instruments	$ 251	$ 4
Derivatives, net
Derivative [Line Items]
Number of derivative instruments terminated | derivative	1
Designated as Hedging Instrument | Derivatives, net
Derivative [Line Items]
Loss on derivative instruments	$ 24
Designated as Hedging Instrument | Cash Flow Hedging | Derivatives at Fair Value | Interest rate swaps
Derivative [Line Items]
Fair value of derivatives	2,200
Designated as Hedging Instrument | Cash Flow Hedging | Derivatives, net
Derivative [Line Items]
Amount required to settle its obligations under the agreement at its aggregate termination value incase of breach	$ 2,200
Designated as Hedging Instrument | Cash Flow Hedging | Derivatives, net | Interest Expense
Derivative [Line Items]
Interests reclassified to AOCI	12 months
Interests reclassified to AOCI period	$ 1,100
Not Designated as Hedging Instrument | Interest rate caps
Derivative [Line Items]
Loss on derivative instruments	$ 300