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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (bbb)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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- Definition

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

+ References

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- Definition

Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 860

-SubTopic 50

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7882072&loc=d3e122625-111746

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Fair Value Measurement - Quantitative Information about Recurring Level 3 Fair Value Measurements (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	13.00%us-gaap_FairValueInputsPrepaymentRate	10.60%us-gaap_FairValueInputsPrepaymentRate
Discount rate	10.00%us-gaap_FairValueInputsDiscountRate	10.00%us-gaap_FairValueInputsDiscountRate
Mortgage servicing rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Mortgages Servicing Rights, Fair Value	7,057		7,378
Minimum [Member] \| Mortgage servicing rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	10.00%		10.00%
Minimum [Member] \| Mortgage servicing rights [Member] \| Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	6.00%		5.70%
Maximum [Member] \| Mortgage servicing rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	12.00%		12.00%
Maximum [Member] \| Mortgage servicing rights [Member] \| Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	23.10%		23.40%
Weighted Average [Member] \| Mortgage servicing rights [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate	10.00%		10.00%
Weighted Average [Member] \| Mortgage servicing rights [Member] \| Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Constant prepayment rate	13.00%		12.00%