Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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-Publisher SEC
-Name Regulation S-X (SX)
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Represents the reference rate for the variable rate of the interest rate derivative.

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Fair value of all liability derivatives designated as cash flow hedging instruments.

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The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

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Fixed interest rate related to the interest rate derivative.

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The portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments representing (a) the amount of the hedge ineffectiveness and (b) the amount, if any, excluded from the assessment of hedge effectiveness.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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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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Fair value of financial and nonfinancial obligations.

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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period.

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Derivative Financial Instruments (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended
Derivative Financial Instruments (Details) - USD ($)	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2009
Derivative Financial Instruments
After-tax unrealized gain on cash flow hedge in other comprehensive income	$ 74,000	$ 40,000	$ 38,000	$ 10,000
Cash flow hedge liability	655,000	870,000	655,000	870,000	$ 718,000
Ineffectiveness in the cash flow hedge	0	0	0	0
Collateral provided	750,000	950,000	750,000	950,000
Mortgage loan pipeline
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	155,747,000	106,460,000	155,747,000	106,460,000	87,486,000
Expected closures
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	$ 116,810,000	79,845,000	$ 116,810,000	79,845,000	65,615,000
Interest rate contracts \| Cash flow hedge
Derivative Financial Instruments
Fixed rate payable on notional amount (as a percent)	4.06%		4.06%
Variable rate basis, variable rate receivable on notional amount			three-month LIBOR
Notional amount						$ 8,000,000
Mortgage servicing rights hedging \| Non-designated hedges
Derivative Financial Instruments
Notional amount	$ 128,500,000	90,000,000	$ 128,500,000	90,000,000	92,000,000
Estimated gain (loss) on fair value of open contracts related to mortgage servicing rights			42,000	863,000	(98,000)
Mortgage loan pipeline commitments
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	3,049,000	2,003,000	3,049,000	2,003,000	1,415,000
Forward commitments
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments
Obligation	146,000,000	86,000,000	146,000,000	86,000,000	73,000,000
Fair value of forward commitments	$ (445,000)	$ (658,000)	$ (445,000)	$ (658,000)	$ (21,000)