Allowance for losses on loans subject to loss share agreements.

No definition available.

Name:	ffbc_AllowanceForCoveredAssetLosses
Namespace Prefix:	ffbc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

For loans and debt securities, 1) for which at acquisition it was probable that the investor would be unable to collect all contractually required payments receivable, and 2) for which it is further probable that the investor will not be able to collect all cash flows expected at acquisition (plus any additional cash flows expected due to changes in estimate after acquisition), the allowance for credit losses recorded to reflect the impairment since acquisition.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5212-111524

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=28368275&loc=d3e5275-111524

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The valuation allowance for financing receivables acquired with deteriorated credit quality.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=28368275&loc=SL6953423-111524

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesAcquiredWithDeterioratedCreditQuality
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

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

ALLOWANCE FOR LOAN AND LEASE LOSSES - Allowance for Loan and Lease Losses on Covered Loans (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending allowance on loans acquired with deteriorated credit quality (ASC 310-30)	$ 23,259		$ 45,190
Ending allowance on acquired loans outside the scope of ASC 310-30	0		0
Ending allowance on covered loans	23,259	32,961	45,190	48,895	48,327	42,835
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending allowance on loans acquired with deteriorated credit quality (ASC 310-30)	8,587		19,136
Ending allowance on acquired loans outside the scope of ASC 310-30	0		0
Ending allowance on covered loans	8,587		19,136
Real estate-commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending allowance on loans acquired with deteriorated credit quality (ASC 310-30)	13,508		22,918
Ending allowance on acquired loans outside the scope of ASC 310-30	0		0
Ending allowance on covered loans	13,508		22,918
Real estate-residential
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending allowance on loans acquired with deteriorated credit quality (ASC 310-30)	993		2,599
Ending allowance on acquired loans outside the scope of ASC 310-30	0		0
Ending allowance on covered loans	993		2,599
Installment
Financing Receivable, Allowance for Credit Losses [Line Items]
Ending allowance on loans acquired with deteriorated credit quality (ASC 310-30)	171		537
Ending allowance on acquired loans outside the scope of ASC 310-30	0		0
Ending allowance on covered loans	$ 171		$ 537