Fair value of the assets less the liabilities of a derivative or group of derivatives.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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Nominal or face amount used to calculate payments on the derivative liability.

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Date the derivative contract matures, in CCYY-MM-DD format.

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Amount of gain (loss) from the ineffectiveness of the hedge.

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The number of derivative instruments of a particular group held by the entity.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The fair value as of the balance sheet date of financial instruments and other positions owned by the entity and pledged to counterparties as collateral, including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities.

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Derivative Financial Instruments (Details)	9 Months Ended	12 Months Ended
Derivative Financial Instruments (Details)	Sep. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Nov. 07, 2013 USD ($) derivative
Derivatives, Fair Value [Line Items]
Owned and pledged as collateral	$ 3,460,000
Interest Rate Swap 1 [Member] \| Interest Expense [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Reclassified from AOCI into Income (Effective Portion)	0	$ 0
Interest Rate Swap 1 [Member] \| Other Income [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Recognized in Income on Derivatives (Ineffective Portion)	0	0
Interest Rate Swap 1 [Member] \| Other Liabilities [Member]
Derivative instrument according to type of hedges [Abstract]
Notional Amount	25,000,000	25,000,000	$ 25,000,000.00
Fair Value	$ (853,000)	$ (1,097,000)
Maturity	Nov. 09, 2020	Nov. 09, 2020
Interest Rate Swap 1 [Member] \| Accumulated Other Comprehensive Income (Loss) [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Recognized in OCI (Effective Portion)	$ 151,000	$ 250,000
Interest Rate Swap 2 [Member] \| Interest Expense [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Reclassified from AOCI into Income (Effective Portion)	0	0
Interest Rate Swap 2 [Member] \| Other Income [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Recognized in Income on Derivatives (Ineffective Portion)	0	0
Interest Rate Swap 2 [Member] \| Other Liabilities [Member]
Derivative instrument according to type of hedges [Abstract]
Notional Amount	25,000,000	25,000,000	$ 25,000,000.00
Fair Value	$ (2,611,000)	$ (2,841,000)
Maturity	Nov. 07, 2023	Nov. 07, 2023
Interest Rate Swap 2 [Member] \| Accumulated Other Comprehensive Income (Loss) [Member]
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]
Amount of Gain (Loss), Recognized in OCI (Effective Portion)	$ 142,000	$ (101,000)
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate swaps held \| derivative			2
Designated as Hedging Instrument [Member] \| Interest Rate Swap 1 [Member]
Derivatives, Fair Value [Line Items]
Number of interest rate swaps held \| derivative			1