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Securities (Details 1) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Securities in an Unrealized Loss Position for Less than 12 Months    
Total temporarily impaired securities Fair Value $ 74,311 $ 78,141
Total temporarily impaired securities Unrealized Losses 1,348 1,898
Securities in an Unrealized Loss Position for More than 12 Months    
Total temporarily impaired securities Fair Value 25,158 18,556
Total temporarily impaired securities Unrealized Losses 1,759 1,657
Total temporarily impaired securities Fair Value 99,469 96,697
Total temporarily impaired securities Unrealized Losses 3,107 3,555
US Government-sponsored enterprises securities [Member]
    
Securities in an Unrealized Loss Position for Less than 12 Months    
AFS Fair Value 12,262 12,212
AFS Unrealized Losses 173 219
Securities in an Unrealized Loss Position for More than 12 Months    
Total temporarily impaired securities Fair Value 12,262 12,212
Total temporarily impaired securities Unrealized Losses 173 219
Mortgage-backed securities [Member]
    
Securities in an Unrealized Loss Position for Less than 12 Months    
AFS Fair Value 62,049 64,937
AFS Unrealized Losses 1,175 1,675
Securities in an Unrealized Loss Position for More than 12 Months    
AFS Fair Value 24,496 17,979
AFS Unrealized Losses 1,387 1,199
Total temporarily impaired securities Fair Value 86,545 82,916
Total temporarily impaired securities Unrealized Losses 2,562 2,874
Corporate bonds [Member]
    
Securities in an Unrealized Loss Position for More than 12 Months    
AFS Fair Value 640 555
AFS Unrealized Losses 360 445
Total temporarily impaired securities Fair Value 640 555
Total temporarily impaired securities Unrealized Losses 360 445
Equities [Member]
    
Securities in an Unrealized Loss Position for More than 12 Months    
AFS Fair Value 22 22
AFS Unrealized Losses 12 13
Total temporarily impaired securities Fair Value 22 22
Total temporarily impaired securities Unrealized Losses 12 13
States and local governments [Member]
    
Securities in an Unrealized Loss Position for Less than 12 Months    
HTM Fair Value   992
HTM Unrealized Losses   4
Securities in an Unrealized Loss Position for More than 12 Months    
Total temporarily impaired securities Fair Value   992
Total temporarily impaired securities Unrealized Losses   $ 4