Derivatives and Hedging Activities - Schedule of Interest Rate Derivatives (Details) - Not Designated as Hedging Instrument [Member] - Interest Rate Swap [Member] $ in Thousands	Mar. 31, 2018 USD ($) derivative	Dec. 31, 2017 USD ($) derivative
Derivative [Line Items]
Number of Instruments | derivative	2	2
Notional Amount | $	$ 78,573	$ 78,949