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Investment Securities - Investment Category and Length of Time (Details)
$ in Thousands
Jun. 30, 2016
USD ($)
investment_security
Dec. 31, 2015
USD ($)
investment_security
Less than 12 months    
Number | investment_security 9 71
Fair Value $ 16,209 $ 121,775
Gross Unrealized Holding Losses $ (77) $ (923)
12 months or Longer    
Number | investment_security 8 9
Fair Value $ 21,940 $ 16,284
Gross Unrealized Holding Losses $ (211) $ (468)
Total    
Number | investment_security 17 80
Fair Value $ 38,149 $ 138,059
Gross Unrealized Holding Losses (288) $ (1,391)
Held-to-maturity, less than 12 months, number of securities | investment_security   1
Held-to-maturity, less than 12 months, fair value   $ 8,330
Held-to-maturity, less than 12 months, gross unrealized holding losses   $ (70)
Held-to-maturity, 12 months or longer, number of securities | investment_security   0
Held-to-maturity, 12 months or longer, fair value   $ 0
Held-to-maturity, 12 months or longer, gross unrealized holding losses   $ 0
Held-to-maturity, number of securities | investment_security   1
Held-to-maturity securities, fair value   $ 8,330
Unrealized Loss $ 0 $ (70)
Total securities, less than 12 months, number of securities | investment_security   72
Total securities, less than 12 months, fair value   $ 130,105
Total securities, less than 12 months, gross unrealized holding losses   $ (993)
Total securities, 12 months or longer, number of securities | investment_security   9
Total securities, 12 months or longer, fair value   $ 16,284
Total securities, 12 months or longer, gross unrealized holding losses   $ (468)
Total securities, number of securities | investment_security   81
Total securities, fair value   $ 146,389
Total securities, gross unrealized holding losses   $ (1,461)
Municipal bonds    
Less than 12 months    
Number | investment_security   32
Fair Value   $ 15,516
Gross Unrealized Holding Losses   $ (61)
12 months or Longer    
Number | investment_security   6
Fair Value   $ 3,349
Gross Unrealized Holding Losses   $ (36)
Total    
Number | investment_security   38
Fair Value   $ 18,865
Gross Unrealized Holding Losses   $ (97)
Collateralized mortgage obligation    
Less than 12 months    
Number | investment_security   5
Fair Value   $ 22,771
Gross Unrealized Holding Losses   $ (183)
12 months or Longer    
Number | investment_security   0
Fair Value   $ 0
Gross Unrealized Holding Losses   $ 0
Total    
Number | investment_security   5
Fair Value   $ 22,771
Gross Unrealized Holding Losses   $ (183)
Mortgage-backed securities    
Less than 12 months    
Number | investment_security 9 34
Fair Value $ 16,209 $ 83,488
Gross Unrealized Holding Losses $ (77) $ (679)
12 months or Longer    
Number | investment_security 8 3
Fair Value $ 21,940 $ 12,935
Gross Unrealized Holding Losses $ (211) $ (432)
Total    
Number | investment_security 17 37
Fair Value $ 38,149 $ 96,423
Gross Unrealized Holding Losses (288) $ (1,111)
Held-to-maturity, less than 12 months, number of securities | investment_security   1
Held-to-maturity, less than 12 months, fair value   $ 8,330
Held-to-maturity, less than 12 months, gross unrealized holding losses   $ (70)
Held-to-maturity, 12 months or longer, number of securities | investment_security   0
Held-to-maturity, 12 months or longer, fair value   $ 0
Held-to-maturity, 12 months or longer, gross unrealized holding losses   $ 0
Held-to-maturity, number of securities | investment_security   1
Held-to-maturity securities, fair value   $ 8,330
Unrealized Loss $ 0 $ (70)