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Aggregate Contractual or Notional Amounts of Derivative Financial Instruments (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Mar. 31, 2014 Derivatives Not Designated As Hedges	Dec. 31, 2013 Derivatives Not Designated As Hedges	Mar. 31, 2013 Derivatives Not Designated As Hedges	Feb. 28, 2014 Interest Rate Swaps Agreement	Oct. 31, 2013 Interest Rate Swaps Agreement	Mar. 31, 2014 Interest Rate Swaps Agreement Designated as Hedging Instrument	Dec. 31, 2013 Interest Rate Swaps Agreement Designated as Hedging Instrument	Mar. 31, 2014 IRLCs Derivatives Not Designated As Hedges	Dec. 31, 2013 IRLCs Derivatives Not Designated As Hedges	Mar. 31, 2013 IRLCs Derivatives Not Designated As Hedges	Mar. 31, 2014 Forward Sale Loan Commitments Derivatives Not Designated As Hedges	Dec. 31, 2013 Forward Sale Loan Commitments Derivatives Not Designated As Hedges
Derivative [Line Items]
Notional or Contractual Amount	$ 13,693	$ 11,690	$ 14,097	$ 5,821	$ 8,237	$ 14,097	$ 4,340	$ 3,500	$ 7,872	$ 3,453	$ 2,039	$ 3,677	$ 14,097	$ 3,782	$ 4,560

X

- Definition

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

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column B

+ Details

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Namespace Prefix:	invest_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

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- Details

Name:	us-gaap_DerivativeLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration