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SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Securities available for sale    
Amortized Cost $ 456,355 $ 413,458
Gross Unrealized Gains 14,170 10,353
Gross Unrealized Losses (3,081) (4,055)
Fair Value 467,444 419,756
Securities held to maturity    
Amortized Cost 51,156 58,912
Gross Unrealized Gains 2,064 1,483
Gross Unrealized Losses (328)  
Fair Value 52,892 60,395
Total Securities    
Total Amortized Cost 507,511 472,370
Total Gross Unrealized Gains 16,234 11,836
Gross Unrealized Losses (3,409) (4,055)
Total Fair Value 520,336 480,151
Debt securities
   
Securities available for sale    
Amortized Cost 428,857 393,222
Gross Unrealized Gains 10,366 8,798
Gross Unrealized Losses (2,864) (3,273)
Fair Value 436,359 398,747
Municipal bonds and obligations
   
Securities available for sale    
Amortized Cost 76,481 73,436
Gross Unrealized Gains 5,855 4,418
Fair Value 82,336 77,854
Securities held to maturity    
Amortized Cost 8,020 10,349
Fair Value 8,020 10,349
Government guaranteed residential mortgage-backed securities
   
Securities available for sale    
Amortized Cost 43,964 44,051
Gross Unrealized Gains 983 1,045
Fair Value 44,947 45,096
Government-sponsored residential mortgage-backed securities
   
Securities available for sale    
Amortized Cost 278,145 245,033
Gross Unrealized Gains 2,404 2,990
Gross Unrealized Losses (537) (412)
Fair Value 280,012 247,611
Securities held to maturity    
Amortized Cost 76 79
Gross Unrealized Gains 8 4
Fair Value 84 83
Corporate bonds
   
Securities available for sale    
Amortized Cost 9,997 9,996
Gross Unrealized Gains 22  
Gross Unrealized Losses (316) (269)
Fair Value 9,703 9,727
Trust preferred securities
   
Securities available for sale    
Amortized Cost 19,979 20,064
Gross Unrealized Gains 1,101 343
Gross Unrealized Losses (2,011) (2,592)
Fair Value 19,069 17,815
Tax advantaged economic development bonds
   
Securities held to maturity    
Amortized Cost 42,021 47,869
Gross Unrealized Gains 2,056 1,479
Gross Unrealized Losses (328)  
Fair Value 43,749 49,348
Other bonds and obligations
   
Securities available for sale    
Amortized Cost 291 642
Gross Unrealized Gains 1 2
Fair Value 292 644
Securities held to maturity    
Amortized Cost 1,039 615
Fair Value 1,039 615
Equity securities, Marketable equity securities
   
Securities available for sale    
Amortized Cost 27,498 20,236
Gross Unrealized Gains 3,804 1,555
Gross Unrealized Losses (217) (782)
Fair Value $ 31,085 $ 21,009