| 
           INVESTMENT SECURITIES (Details Textuals) (USD $) 
        In Thousands, unless otherwise specified  | 
        
           Sep. 30, 2012 
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           Dec. 31, 2011 
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|---|---|---|
| Investment Securities Details Textuals | ||
| Investment Securities with net pre-tax unrealized gains | $ 287,207 | |
| Net pre-tax unrealized gain on investment securities | 1,000 | |
| Total Securities with continuous unrealized losses | 40,632 | 36,544 | 
| Total Unrealized losses on securities | 726 | 773 | 
| Securities with continuous unrealized losses form less than 12 months | 28,406 | 35,907 | 
| Unrealized losses on securities form less than 12 months | 72 | 173 | 
| Securities with continuous unrealized losses from 12 months or longer | 12,226 | 637 | 
| Unrealized losses on securities from 12 months or longer | 654 | 600 | 
| Unrealized losses on preferred bank stock form 12 months or longer | $ 11,600 | 
| X | ||||||||||
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- Definition 
          This element refers to available for sale securities continuous unrealized loss position twelve months or longer fair value. No definition available. 
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- Definition 
          This element refers to available for sale securities gross unrealized gain before tax. No definition available. 
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- Details 
          
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- Definition 
          Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for twelve months or longer for securities which are categorized neither as held-to-maturity nor trading securities. No definition available. 
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- Definition 
          Amount of the excess of amortized cost basis over fair value of securities in a loss position and categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          Amount of the excess of amortized cost basis over fair value of securities that have been in a loss position for less than twelve months for securities categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for twelve months or longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Definition 
          Amount of available-for-sale debt securities at cost, net of adjustments, which include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings (less any cumulative-effect adjustments, as defined) and fair value hedge accounting adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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