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Securities (Tables)
9 Months Ended
Sep. 30, 2017
Securities [Abstract]  
Book values and approximate fair values of investment securities

The book values and approximate fair values of investment securities at September 30, 2017 and December 31, 2016 are summarized as follows:

 

   September 30, 2017   December 31, 2016 
   Amortized   Fair   Unrealized   Amortized   Fair   Unrealized 
($ in thousands)  Cost   Value   Gains   (Losses)   Cost   Value   Gains   (Losses) 
                                 
Securities available for sale:                                        
  Government-sponsored enterprise securities  $9,000    8,992    1    (9)   17,497    17,490        (7)
  Mortgage-backed securities   155,684    155,535    713    (862)   151,001    148,065    155    (3,091)
  Corporate bonds   33,802    34,397    660    (65)   33,833    33,600    91    (324)
  Equity securities                   83    174    96    (5)
Total available for sale  $198,486    198,924    1,374    (936)   202,414    199,329    342    (3,427)
                                         
Securities held to maturity:                                        
  Mortgage-backed securities  $67,708    67,529    15    (194)   80,585    79,283        (1,302)
  State and local governments   55,448    57,349    1,908    (7)   49,128    50,912    1,815    (31)
Total held to maturity  $123,156    124,878    1,923    (201)   129,713    130,195    1,815    (1,333)
Schedule of information regarding securities with unrealized losses

The following table presents information regarding securities with unrealized losses at September 30, 2017:

 

($ 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  $6,491    9            6,491    9 
  Mortgage-backed securities   110,437    555    24,250    501    134,687    1,056 
  Corporate bonds           935    65    935    65 
  State and local governments           813    7    813    7 
      Total temporarily impaired securities  $116,928    564    25,998    573    142,926    1,137 

 

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 
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 September 30, 2017, 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  $        1,872    1,883 
Due after one year but within five years   10,008    10,037    23,907    24,681 
Due after five years but within ten years   27,794    28,242    23,979    25,040 
Due after ten years   5,000    5,110    5,690    5,745 
Mortgage-backed securities   155,684    155,535    67,708    67,529 
Total securities  $198,486    198,924    123,156    124,878