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Disclosures about Fair Value of Assets and Liabilities - Reconciliation of Beginning and Ending Balances of Recurring Fair Value Measurements Recognized in Accompanying Condensed Consolidated Balance Sheet Using Significant Unobservable (Level 3) Inputs (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012
Hedged Loans [Member] |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |
Beginning balance | $ 54,362
Included in net income | (74)
Included in other comprehensive income, gross |
Purchases, issuances, and settlements | 6,114
Principal payments | (491)
Transfers out to Level 2 | (59,911)
Ending balance |
Forward Sale Commitments [Member] |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |
Beginning balance | 662
Included in net income | (152)
Included in other comprehensive income, gross |
Purchases, issuances, and settlements |
Principal payments |
Transfers out to Level 2 | (510)
Ending balance |
Interest Rate Swap Agreements [Member] |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |
Beginning balance | (7,101)
Included in net income | 74
Included in other comprehensive income, gross | 563
Purchases, issuances, and settlements |
Principal payments |
Transfers out to Level 2 | 6,464
Ending balance |
Commitments to Originate Loans [Member] |
Fair Value Of Assets And Liabilities Measured On Non Recurring Basis [Line Items] |
Beginning balance |
Included in net income | (71)
Included in other comprehensive income, gross |
Purchases, issuances, and settlements |
Principal payments |
Transfers out to Level 2 | 71
Ending balance |

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- Definition Fair value measurement with unobservable inputs reconciliation recurring basis principal payments. + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in the income statement for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Amount of gain (loss) recognized in other comprehensive income (loss) for financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1a) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph c -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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- Definition Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy. + References No definition available. + Details
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