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Effect of Derivative and Hedging Activity, on Statement of Income (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
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Sep. 30, 2013 | Sep. 30, 2013
Derivatives designated as hedges |  |
Derivative, Gain (Loss) on Derivative, Net | $ 307 | $ (128)
Derivatives Not Designated As Hedges |  |
Derivatives designated as hedges |  |
Derivative, Gain (Loss) on Derivative, Net | 307 | (128)
IRLCs | Derivatives Not Designated As Hedges | Other Income |  |
Derivatives designated as hedges |  |
Derivative, Gain (Loss) on Derivative, Net | $ 307 | $ (128)

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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