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Disclosures about Fair Value of Assets and Liabilities - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Fair Value Disclosures [Abstract]
Increase (Decrease) in carrying amount of mortgage servicing rights	$ (51,000)	$ 28,000

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- References

No definition available.

+ Details

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- Definition

The increase (decrease) in the fair value of servicing assets that are subsequently measured at fair value.

+ 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)



-URI http://asc.fasb.org/extlink&oid=56950315&loc=d3e122625-111746

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