Derivatives and Hedging Activities (Details)			3 Months Ended
	Mar. 31, 2017 USD ($) instrument loan	Dec. 31, 2016 USD ($) instrument loan	Mar. 31, 2017 USD ($) instrument loan	Mar. 31, 2016 USD ($)
Derivative [Line Items]
Number of Participation Loans with Swap Contingent Liabilities | loan	2	2	2
Interest rate swap
Derivative [Line Items]
Gain (Loss) on Interest Rate Swaps			$ 0	$ 0
Number of Interest Rate Swaps | instrument	4	4	4
Aggregate notional value of interest-rate swaps	$ 21,600,000	$ 26,700,000	$ 21,600,000
Fair Value of Interest-Rate Swap Assets	573,000	610,000	573,000
Fair Value of Interest-Rate Swap Liability	573,000	610,000	573,000
Counterparty Credit Risk Exposure on Interest Rate Swaps	573,000	610,000
Gross Amount Interest Rate Swap Asset Recognized	573,000	610,000	573,000
Net Asset Amount, Interest Rate Swap	573,000	610,000	573,000
Gross Amount Interest Rate Swap Liability Recognized	573,000	610,000	573,000
Collateral posted	0	0	0
Net Liability Amount, Interest Rate Swap	$ 573,000	$ 610,000	$ 573,000