Derivatives and Hedging Activities - Schedule of Interest Rate Derivatives (Details) - Interest Rate Swap [Member] $ in Thousands	Mar. 31, 2017 USD ($) derivative	Dec. 31, 2016 USD ($) derivative
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Number of Instruments | derivative	11	14
Notional Amount | $	$ 637,304	$ 690,816
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Number of Instruments | derivative	1	1
Notional Amount | $	$ 51,400	$ 51,400