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Derivatives and Hedging Activity (Details)
$ in Thousands
Dec. 31, 2015
USD ($)
instruments
Designated as Hedging Instrument | Interest rate swaps  
Derivative [Line Items]  
Number of Instruments 5
Derivative, Notional Amount $ 315,000
Designated as Hedging Instrument | Interest rate caps  
Derivative [Line Items]  
Number of Instruments 2
Derivative, Notional Amount $ 203,166
Not Designated as Hedging Instrument | Interest rate caps  
Derivative [Line Items]  
Number of Instruments | instruments 3
Derivative, Notional Amount $ 133,107