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Composition of Borrowings (Detail) - USD ($) $ in Thousands | Sep. 30, 2015 | Jun. 30, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |
Federal funds purchased |  | $ 0 |  | $ 0
Securities sold under agreements to repurchase: |  |  |  |
Securities sold under agreements to repurchase |  | 124,076 |  | 121,742
FHLB borrowings |  | 65,000 |  | 90,000
Subordinated debt |  | 15,464 |  | 15,464
Other debt |  | 491 |  | 2,535
Total borrowings |  | $ 205,031 |  | $ 229,741
Federal funds purchased | [1] |  |  | 0.34%
Retail | [1] | 0.10% |  | 0.13%
Wholesale Repurchase Agreements |  |  |  |
Securities sold under agreements to repurchase: |  |  |  |
Weighted average contractual rate | [1] | 3.71% |  | 3.71%
FHLB Borrowings |  |  |  |
Securities sold under agreements to repurchase: |  |  |  |
FHLB borrowings |  |  | $ 25,000 |
Weighted average contractual rate | [1] | 4.04% |  | 4.07%
Retail |  |  |  |
Securities sold under agreements to repurchase: |  |  |  |
Securities sold under agreements to repurchase |  | $ 74,076 |  | $ 71,742
Wholesale |  |  |  |
Securities sold under agreements to repurchase: |  |  |  |
Securities sold under agreements to repurchase |  | $ 50,000 |  | $ 50,000
[1] | Weighted average contractual rate

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- Definition Amount of short term borrowing where a bank borrows, at the federal funds rate, from another bank. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13(1)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Article 5 -Subsection 19, 20, 22 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 10 -Section F + Details
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