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v3.8.0.1

OTHER BORROWINGS - Components of Other Borrowings (Parenthetical) (Detail) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Junior Subordinated Debentures Bearing Interest At Floating Rate Of Two Point Seventy Five [Member] |  |
Debt Instrument [Line Items] |  |
Floating Interest rate on junior subordinated debentures | 4.35% | 3.74%
Subordinated Borrowing Due Date | Jun. 17, 2034 |
Callable step-rate notes rate | 2.75% |
Junior Subordinated Debentures Bearing Interest At Floating Rate Of Two Point Fifty Percent [Member] |  |
Debt Instrument [Line Items] |  |
Floating Interest rate on junior subordinated debentures | 4.12% | 3.50%
Subordinated Borrowing Due Date | Sep. 20, 2034 |
Callable step-rate notes rate | 2.50% |

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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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