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           BORROWINGS (Short-Term Borrowings) (Details) (USD $) 
        In Thousands, unless otherwise specified  | 
        9 Months Ended | 12 Months Ended | 
|---|---|---|
| 
           Sep. 30, 2014 
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           Dec. 31, 2013 
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      |
| Short-term borrowings | ||
| Securities sold under agreements to repurchase | $ 33,517 | $ 52,455 | 
| Other short-term borrowings | 195,000 | 211,500 | 
| Total short-term borrowings | 228,517 | 263,955 | 
| Maximum month-end outstanding balance | 274,281 | 263,955 | 
| Average outstanding balance during the period | 238,104 | 119,433 | 
| Average interest rate during the period | 0.24% | 0.30% | 
| Average interest rate at end of period | 0.20% | 0.30% | 
| Other short-term borrowings: | ||
| Federal Funds purchased | 31,500 | |
| FHLB | $ 195,000 | $ 180,000 | 
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- Definition 
          The effective interest rate at the end of the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          The average effective interest rate during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount of short term borrowing where a bank borrows, at the federal funds rate, from another bank. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Federal Home Loan Bank borrowings due within one year of the latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Sum of the carrying amounts at the balance sheet date of short-term borrowings not otherwise specified in the taxonomy having initial terms less than one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security resale agreement between the entity and another party for the purchase and resale of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition 
          For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period. No definition available. 
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- Definition 
          For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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