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SECURITIES AVAILABLE FOR SALE AND HELD TO MATURITY (Details 3) (USD $)
9 Months Ended
Sep. 30, 2012
item
Dec. 31, 2011
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses $ 427,000 $ 1,402,000
Less Than Twelve Months, Fair Value 84,651,000 91,872,000
Over Twelve Months, Gross Unrealized Losses 2,654,000 2,653,000
Over Twelve Months, Fair Value 29,290,000 11,782,000
Total Gross Unrealized Losses 3,081,000 4,055,000
Total Fair Value 113,941,000 103,654,000
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 328,000  
Less Than Twelve Months, Fair Value 8,239,000  
Total Gross Unrealized Losses 328,000  
Total Fair Value 8,239,000  
Securities available for sale and held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 755,000  
Less Than Twelve Months, Fair Value 92,890,000  
Over Twelve Months, Gross Unrealized Losses 2,654,000  
Over Twelve Months, Fair Value 29,290,000  
Total Gross Unrealized Losses 3,409,000  
Total Fair Value 122,180,000  
Debt Securities    
Total unrealized losses 3,081,000 4,055,000
Fair value of investment 467,444,000 419,756,000
Level 3
   
Debt Securities    
Fair value of investment 817,000  
Debt securities
   
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 421,000 620,000
Less Than Twelve Months, Fair Value 79,986,000 85,643,000
Over Twelve Months, Gross Unrealized Losses 2,443,000 2,653,000
Over Twelve Months, Fair Value 27,502,000 11,782,000
Total Gross Unrealized Losses 2,864,000 3,273,000
Total Fair Value 107,488,000 97,425,000
Debt Securities    
Total unrealized losses 2,864,000 3,273,000
Fair value of investment 436,359,000 398,747,000
Residential mortgage-backed securities
   
Debt Securities    
Number of AFS investment securities in an unrealized loss position 18  
Number of securities in the portfolio of AFS 166  
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions 1.00%  
Government-sponsored residential mortgage-backed securities
   
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 421,000 376,000
Less Than Twelve Months, Fair Value 79,986,000 76,326,000
Over Twelve Months, Gross Unrealized Losses 116,000 36,000
Over Twelve Months, Fair Value 17,196,000 5,766,000
Total Gross Unrealized Losses 537,000 412,000
Total Fair Value 97,182,000 82,092,000
Debt Securities    
Total unrealized losses 537,000 412,000
Fair value of investment 280,012,000 247,611,000
Corporate bonds
   
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses   224,000
Less Than Twelve Months, Fair Value   6,776,000
Over Twelve Months, Gross Unrealized Losses 316,000 45,000
Over Twelve Months, Fair Value 6,684,000 2,951,000
Total Gross Unrealized Losses 316,000 269,000
Total Fair Value 6,684,000 9,727,000
Debt Securities    
Number of AFS securities remains investment grade rated 3  
Number of AFS investment securities in an unrealized loss position 2  
Number of securities in the portfolio of AFS 3  
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions 4.50%  
Total unrealized losses 316,000 269,000
Fair value of investment 9,703,000 9,727,000
Trust preferred securities
   
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses   20,000
Less Than Twelve Months, Fair Value   2,541,000
Over Twelve Months, Gross Unrealized Losses 2,011,000 2,572,000
Over Twelve Months, Fair Value 3,622,000 3,065,000
Total Gross Unrealized Losses 2,011,000 2,592,000
Total Fair Value 3,622,000 5,606,000
Debt Securities    
Number of AFS securities remains investment grade rated 6  
Number of AFS securities graded atleast one below investment grade rating 4  
Number of AFS investment securities in an unrealized loss position 3  
Number of securities in the portfolio of AFS 6  
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions 36.00%  
Total unrealized losses 2,011,000 2,592,000
Fair value of investment 19,069,000 17,815,000
Amount of securities issued by banking and insurance entities 360,000,000  
Protection from credit loss afforded in excess subordination above current and projected losses 46,000,000  
Trust preferred securities | Level 3
   
Debt Securities    
Fair value of investment 800,000  
Tax advantaged economic development bonds
   
Securities held to maturity    
Less Than Twelve Months, Gross Unrealized Losses 328,000  
Less Than Twelve Months, Fair Value 8,239,000  
Total Gross Unrealized Losses 328,000  
Total Fair Value 8,239,000  
Debt Securities    
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions 3.80%  
Number of HTM investment securities in an unrealized loss position 1  
Number of securities in the portfolio of HTM 8  
Equity securities, Marketable equity securities
   
Securities available for sale    
Less Than Twelve Months, Gross Unrealized Losses 6,000 782,000
Less Than Twelve Months, Fair Value 4,665,000 6,229,000
Over Twelve Months, Gross Unrealized Losses 211,000  
Over Twelve Months, Fair Value 1,788,000  
Total Gross Unrealized Losses 217,000 782,000
Total Fair Value 6,453,000 6,229,000
Debt Securities    
Number of AFS investment securities in an unrealized loss position 3  
Number of securities in the portfolio of AFS 22  
Aggregate unrealized losses as a percentage of the amortized cost of the securities in unrealized loss positions 3.30%  
Total unrealized losses 217,000 782,000
Fair value of investment 31,085,000 21,009,000
Mezzanine Class B tranche
   
Debt Securities    
Total unrealized losses 1,800,000  
Fair value of investment $ 2,600,000