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Investment Securities (Details 2) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Fair Value    
Less than 12 months $ 18,601 $ 108,726
12 months or more 78,228 6,391
Total 96,829 115,117
Unrealized Losses    
Less than 12 months (100) (3,866)
12 months or more (1,895) (304)
Total (1,995) (4,170)
Government sponsored enterprises
    
Fair Value    
Less than 12 months 3,473 25,771
12 months or more 24,280 0
Total 27,753 25,771
Unrealized Losses    
Less than 12 months (13) (767)
12 months or more (234) 0
Total (247) (767)
Asset-backed securities
    
Fair Value    
Less than 12 months 12,035 76,048
12 months or more 50,745 5,941
Total 62,780 81,989
Unrealized Losses    
Less than 12 months (74) (2,940)
12 months or more (1,603) (251)
Total (1,677) (3,191)
Obligations of states and political subdivisions
    
Fair Value    
Less than 12 months 3,093 6,907
12 months or more 3,203 450
Total 6,296 7,357
Unrealized Losses    
Less than 12 months (13) (159)
12 months or more (58) (53)
Total $ (71) $ (212)