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Fair Value Measurements (Details 3) - Recurring - Significant Unobservable Inputs (Level 3) - Mortgage servicing rights	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Quantitative Information
Weighted average constant prepayment rate (as a percent)	10.06%	10.05%
Weighted average discount rate (as a percent)	9.35%	9.18%
Weighted average expected life (in years)	5 years 9 months 18 days	5 years 10 months 24 days
Fair value measurements valuation techniques	Discounted cash flows	Discounted cash flows

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Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt.

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Rate at which loans or a loan portfolio are expected to prepay principal balances, used as an input to measure fair value.

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Description of the inputs and valuation technique(s) used to measure fair value.

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Weighted average life of financial assets and financial liabilities, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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