Derivative Instruments and Hedging Activities - Narrative (Details) $ in Thousands		3 Months Ended
	Oct. 24, 2014 USD ($)	Mar. 31, 2017 USD ($) instrument	Dec. 31, 2016 USD ($)
Derivative [Line Items]
Loans receivable with fixed rates of interest maturity period	10 years
Loans receivable with fixed rates	$ 29,100
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount		$ 19,803	$ 19,993
Derivative Liabilities		167	254
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount		119,744	107,448
Derivative Liabilities		$ 114	74
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Loans receivable with fixed rates of interest maturity period		15 years
Derivative fixed interest rate		7.43%
Notional Amount		$ 598	622
Loans receivable fixed interest rate (percentage)		7.43%
Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivative Liabilities		$ 57	65
Credit Risk Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount		$ 47,501	27,919
Derivative number of instruments held | instrument		12
Underlying derivative at fair value		$ 57
Credit Risk Contract [Member] | Not Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivative Liabilities		57	9
Cash Flow Hedging [Member] | Interest Rate Swap [Member]
Derivative [Line Items]
Derivative asset notional amount	$ 20,000
Derivative fixed interest rate	2.10%
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months		151
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount		18,386	18,566
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivative Liabilities		$ 138	217
Fair Value Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Loans receivable with fixed rates of interest maturity period		10 years
Derivative fixed interest rate		5.83%
Notional Amount		$ 1,417	1,427
Loans receivable fixed interest rate (percentage)		5.83%
Fair Value Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivative [Line Items]
Derivative Liabilities		$ 29	$ 37
Minimum [Member] | Credit Risk Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative remaining maturity		2 years
Maximum [Member] | Credit Risk Contract [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative remaining maturity		10 years
One-Month LIBOR [Member] | Interest Rate Swap [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative basis spread on variable rate		2.24%
One-Month LIBOR [Member] | Fair Value Hedging [Member] | Interest Rate Swap [Member] | Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative basis spread on variable rate		3.50%