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SECURITIES (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
item
Dec. 31, 2012
security
Dec. 31, 2011
Available for sale securities      
Amortized Cost $ 889,360 $ 862,759  
Gross Unrealized Gains 16,995 39,837  
Gross Unrealized Losses (15,249) (255)  
Fair Value 891,106 902,341  
Available for Sale, Amortized Cost      
Within one year 14,715    
One through five years 54,799    
Six through ten years 120,911    
After ten years 135,046    
Equity securities 4,939    
Total available for sale securities 889,360 862,759  
Available for Sale, Fair Value      
Within one year 14,940    
One through five years 56,864    
Six through ten years 123,992    
After ten years 139,633    
Equity securities 4,939    
Fair Value 891,106 902,341  
Available for sale securities      
Gross proceeds from sales of securities 80,151 64,176 366,559
Gross gains realized on sales 912 1,944 11,440
Gross losses realized on sales 77 77 83
Tax provision related to net realized gains 284 635 3,861
Carrying value of securities pledged to secure certain deposits and repurchase agreements, secure future funding needs, and for other purposes as permitted or required by law 323,542 259,613  
Securities in a continuous unrealized loss position with unrealized losses presented by length of time      
Less than 12 months, Fair Value 413,275 52,732  
Less than 12 months, Unrealized Losses (14,631) (255)  
12 months or longer, Fair Value 9,246    
12 months or longer, Unrealized Losses (618)    
Total Fair Value 422,521 52,732  
Total Unrealized Losses (15,249) (255)  
Other-Than-Temporary-Impairment      
Number of general segments segregated in investment securities portfolio 2    
Securities evaluated using model outlined in ASC 325-10 0    
Number of security in the portfolio 1,054    
Number of portfolio security in unrealized loss position 178    
Decline in fair value of security attributable to change in interest rates and illiquidity 3,800    
Number of investments on which impairment loss was recognized   1  
Fair value of the equity holdings   250  
Impairment loss recognized   500  
Minimum
     
Available for sale securities      
Percentage of shareholders' equity held by any one issuer, other than the U.S. Government and its sponsored entities 10.00% 10.00%  
Securities of any one issuer, other than U.S. Government securities, greater than 10% of shareholders equity 0    
U. S. government agency
     
Available for sale securities      
Amortized Cost 793 1,600  
Gross Unrealized Gains 5 38  
Fair Value 798 1,638  
Available for Sale, Amortized Cost      
Total available for sale securities 793 1,600  
Available for Sale, Fair Value      
Fair Value 798 1,638  
State and municipal
     
Available for sale securities      
Amortized Cost 321,151 310,552  
Gross Unrealized Gains 12,173 27,484  
Gross Unrealized Losses (2,212) (97)  
Fair Value 331,112 337,939  
Available for Sale, Amortized Cost      
Total available for sale securities 321,151 310,552  
Available for Sale, Fair Value      
Fair Value 331,112 337,939  
Securities in a continuous unrealized loss position with unrealized losses presented by length of time      
Less than 12 months, Fair Value 31,660 6,646  
Less than 12 months, Unrealized Losses (1,791) (97)  
12 months or longer, Fair Value 4,153    
12 months or longer, Unrealized Losses (421)    
Total Fair Value 35,813 6,646  
Total Unrealized Losses (2,212) (97)  
Mortgage-backed securities-residential (Government Sponsored Entity)
     
Available for sale securities      
Amortized Cost 186,054 219,352  
Gross Unrealized Gains 3,175 7,711  
Gross Unrealized Losses (3,800) (8)  
Fair Value 185,429 227,055  
Available for Sale, Amortized Cost      
Debt securities without single maturity date 186,054    
Total available for sale securities 186,054 219,352  
Available for Sale, Fair Value      
Debt securities without single maturity date 185,429    
Fair Value 185,429 227,055  
Securities in a continuous unrealized loss position with unrealized losses presented by length of time      
Less than 12 months, Fair Value 114,036 12,766  
Less than 12 months, Unrealized Losses (3,800) (8)  
Total Fair Value 114,036 12,766  
Total Unrealized Losses (3,800) (8)  
Collateralized mortgage obligations (Government Sponsored Entity)
     
Available for sale securities      
Amortized Cost 372,896 322,758  
Gross Unrealized Gains 1,642 4,604  
Gross Unrealized Losses (9,229) (139)  
Fair Value 365,309 327,223  
Other than temporary impairment on available for sale securities 0    
Available for Sale, Amortized Cost      
Debt securities without single maturity date 372,896    
Total available for sale securities 372,896 322,758  
Available for Sale, Fair Value      
Debt securities without single maturity date 365,309    
Fair Value 365,309 327,223  
Securities in a continuous unrealized loss position with unrealized losses presented by length of time      
Less than 12 months, Fair Value 267,579 32,330  
Less than 12 months, Unrealized Losses (9,040) (139)  
12 months or longer, Fair Value 4,100    
12 months or longer, Unrealized Losses (189)    
Total Fair Value 271,679 32,330  
Total Unrealized Losses (9,229) (139)  
Equity securities
     
Available for sale securities      
Amortized Cost 4,939 4,939  
Fair Value 4,939 4,939  
Available for Sale, Amortized Cost      
Total available for sale securities 4,939 4,939  
Available for Sale, Fair Value      
Fair Value 4,939 4,939  
Other securities
     
Available for sale securities      
Amortized Cost 3,527 3,558  
Gross Unrealized Losses (8) (11)  
Fair Value 3,519 3,547  
Available for Sale, Amortized Cost      
Total available for sale securities 3,527 3,558  
Available for Sale, Fair Value      
Fair Value 3,519 3,547  
Securities in a continuous unrealized loss position with unrealized losses presented by length of time      
Less than 12 months, Fair Value   990  
Less than 12 months, Unrealized Losses   (11)  
12 months or longer, Fair Value 993    
12 months or longer, Unrealized Losses (8)    
Total Fair Value 993 990  
Total Unrealized Losses $ (8) $ (11)  
Other-Than-Temporary-Impairment      
Number of single issue trust preferred securities to which the unrealized losses on other securities are related 1