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Covered Assets and FDIC Loss Sharing Asset - Additional Information (Detail) (USD $) | 0 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Oct. 16, 2009 | Mar. 31, 2014 | Dec. 31, 2013
Business Combinations [Abstract] |  |  |
Acquisition date |  | Oct. 16, 2009 |
After-tax gain included in earnings due to purchase method | $ 12,300,000 |  |
Remaining discount associated with SJB loans |  | 11,200,000 |
Expected cash flows |  | 7,900,000 |
Remaining average lives of respective pools loans |  | 4 years 3 months 18 days |
Remaining average lives of respective individual loans |  | 2 years |
FDIC loss sharing asset |  | 1,370,000 | 4,764,000
Allowance for covered loans |  | $ 0 | $ 0

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- Definition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e845-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Acquisition Date -URI http://asc.fasb.org/extlink&oid=6919109 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e848-128460 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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