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Intangible Assets And Goodwill - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Weighted-average life	7 years 4 months 24 days
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-average life	9 years 8 months 12 days
Core deposit intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-average life	6 years 7 months 6 days
Mortgage servicing intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted-average life	3 years 3 months 18 days

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- Details

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

X

- Definition

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration