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Securities (Tables)
12 Months Ended
Dec. 31, 2016
Securities [Abstract]  
Book values and approximate fair values of investment securities

The book values and approximate fair values of investment securities at December 31, 2016 and 2015 are summarized as follows:

 

   2016   2015 
   Amortized   Fair   Unrealized   Amortized   Fair   Unrealized 
($ in thousands)  Cost   Value   Gains   (Losses)   Cost   Value   Gains   (Losses) 
                                 
Securities available for sale:                                        
  Government-sponsored enterprise securities  $17,497    17,490        (7)   19,000    18,972    1    (29)
  Mortgage-backed securities   151,001    148,065    155    (3,091)   122,474    121,553    348    (1,269)
  Corporate bonds   33,833    33,600    91    (324)   25,216    24,946        (270)
  Equity securities   83    174    96    (5)   88    143    64    (9)
Total available for sale  $202,414    199,329    342    (3,427)   166,778    165,614    413    (1,577)
                                         
Securities held to maturity:                                        
  Mortgage-backed securities  $80,585    79,283        (1,302)   102,509    101,767        (742)
  State and local governments   49,128    50,912    1,815    (31)   52,101    55,379    3,284    (6)
Total held to maturity  $129,713    130,195    1,815    (1,333)   154,610    157,146    3,284    (748)
Schedule of information regarding securities with unrealized losses

The following table presents information regarding securities with unrealized losses at December 31, 2016:

 

($ in thousands)  Securities in an Unrealized
Loss Position for
Less than 12 Months
   Securities in an Unrealized
Loss Position for
More than 12 Months
   Total 
   Fair Value   Unrealized
Losses
   Fair Value   Unrealized
Losses
   Fair Value   Unrealized
Losses
 
  Government-sponsored enterprise securities  $7,990    7            7,990    7 
  Mortgage-backed securities   196,999    3,841    19,001    552    216,000    4,393 
  Corporate bonds   27,027    259    935    65    27,962    324 
  Equity securities           7    5    7    5 
  State and local governments   801    31            801    31 
      Total temporarily impaired securities  $232,817    4,138    19,943    622    252,760    4,760 

 

The following table presents information regarding securities with unrealized losses at December 31, 2015:

 

($ in thousands)  Securities in an Unrealized
Loss Position for
Less than 12 Months
   Securities in an Unrealized
Loss Position for
More than 12 Months
   Total 
   Fair Value   Unrealized
Losses
   Fair Value   Unrealized
Losses
   Fair Value   Unrealized
Losses
 
  Government-sponsored enterprise securities  $5,993    7    2,978    22    8,971    29 
  Mortgage-backed securities   150,853    1,148    27,460    863    178,313    2,011 
  Corporate bonds   24,006    210    940    60    24,946    270 
  Equity securities           17    9    17    9 
  State and local governments   840    6            840    6 
      Total temporarily impaired securities  $181,692    1,371    31,395    954    213,087    2,325 
Schedule of book values and approximate fair values of investment securities by contractual maturity

The book values and approximate fair values of investment securities at December 31, 2016, by contractual maturity, are summarized in the table below. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations with or without call or prepayment penalties.

 

   Securities Available for Sale   Securities Held to Maturity 
   Amortized   Fair   Amortized   Fair 
($ in thousands)  Cost   Value   Cost   Value 
                 
Debt securities                    
Due within one year  $       $2,016    2,028 
Due after one year but within five years   17,497    17,490    16,256    16,767 
Due after five years but within ten years   28,833    28,682    29,690    30,981 
Due after ten years   5,000    4,918    1,166    1,136 
Mortgage-backed securities   151,001    148,065    80,585    79,283 
Total debt securities   202,331    199,155    129,713    130,195 
                     
Equity securities   83    174         
Total securities  $202,414    199,329   $129,713    130,195