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Interest Bearing Deposits (Remaining Maturities Of Time Deposits of $100,000 Or More) (Details) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Banking and Thrift [Abstract]    
Three months or less $ 494,891,000  
Over three months through six months 299,599,000  
Over six months through twelve months 310,738,000  
Over twelve months 499,218,000  
Time, $100,000 and over 1,604,446,000 $ 1,765,721,000
Time Deposit Of One Hundred Thousand Or More $ 100,000