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CASH AND SECURITIES (Cash and Cash Equivalents) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Investments, Debt and Equity Securities [Abstract]        
Cash equivalents: $ 181,100 $ 132,189    
Cash equivalents:        
Short-term cash investments 198 247    
Cash and due from banks $ 181,298 $ 132,436 $ 361,652 $ 323,005