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OFF-BALANCE SHEET COMMITMENTS AND OTHER RELATED ACTIVITIES - Additional Information (Detail) $ in Millions	9 Months Ended
	Sep. 30, 2015 USD ($)
Other Commitments [Line Items]
Commitments to make loans period, maximum	30 days
Commitments to sell loans under residential mortgage division	$ 564.0
Jumbo mortgage loan commitments
Other Commitments [Line Items]
Commitments to sell loans under residential mortgage division	0.0
TBAs commitments
Other Commitments [Line Items]
Commitments to sell loans under residential mortgage division	517.0
Best efforts commitments
Other Commitments [Line Items]
Commitments to sell loans under residential mortgage division	47.0
Other Commitments
Other Commitments [Line Items]
Commitments to sell loans under residential mortgage division	0.0
Interest rate lock commitments
Other Commitments [Line Items]
Commitments to sell loans under residential mortgage division	$ 309.2

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- Definition

Other Commitments, Origination of Loans, Period

+ References

No definition available.

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- Definition

Reflects the carrying amount of loans and leases for which agreements to acquire or dispose exist.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 942



-SubTopic 825



-Section 50



-Paragraph 1



-Subparagraph (a)



-URI http://asc.fasb.org/extlink&oid=6480020&loc=d3e61044-112788



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 942



-SubTopic 825



-Section 50



-Paragraph 2



-URI http://asc.fasb.org/extlink&oid=6480020&loc=d3e61082-112788

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