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Investment Securities (Tables)
3 Months Ended
Mar. 31, 2017
Investment Securities [Abstract]  
Amortized Cost, Fair Values, and Unrealized Gains and Losses of Securities Available-for-Sale
The amortized cost, fair values, and unrealized gains and losses of the securities available-for-sale are as follows
(in thousands):

  
Amortized
  
Gross Unrealized
  
Fair/Book
 
March 31, 2017
 
Cost
  
Gains
  
Losses
  
Value
 
Government Agency & Government-Sponsored Entities
 
$
3,115
  
$
102
  
$
-
  
$
3,217
 
US Treasury Notes
  
104,717
   
2
   
300
   
104,419
 
US Govt SBA
  
34,947
   
34
   
247
   
34,734
 
Mortgage Backed Securities (1)
  
309,187
   
1,820
   
1,545
   
309,462
 
Other
  
1,010
   
-
   
-
   
1,010
 
Total
 
$
452,976
  
$
1,958
  
$
2,092
  
$
452,842
 
 
  
Amortized
  
Gross Unrealized
  
Fair/Book
 
December 31, 2016
 
Cost
  
Gains
  
Losses
  
Value
 
Government Agency & Government-Sponsored Entities
 
$
3,127
  
$
114
  
$
-
  
$
3,241
 
US Treasury Notes
  
134,755
   
5
   
332
   
134,428
 
US Govt SBA
  
36,532
   
42
   
260
   
36,314
 
Mortgage Backed Securities (1)
  
272,858
   
1,725
   
1,313
   
273,270
 
Other
  
1,010
   
-
   
-
   
1,010
 
Total
 
$
448,282
  
$
1,886
  
$
1,905
  
$
448,263
 
 
  
Amortized
  
Gross Unrealized
  
Fair/Book
 
March 31, 2016
 
Cost
  
Gains
  
Losses
  
Value
 
Government Agency & Government-Sponsored Entities
 
$
63,157
  
$
190
  
$
1
  
$
63,346
 
US Treasury Notes
  
65,571
   
217
   
-
   
65,788
 
Mortgage Backed Securities (1)
  
207,021
   
5,113
   
7
   
212,127
 
Other
  
510
   
-
   
-
   
510
 
Total
 
$
336,259
  
$
5,520
  
$
8
  
$
341,771
 
 
(1) All Mortgage Backed Securities consist of securities collateralized by residential real estate and were issued by an agency or government sponsored entity of the U.S. government.
Book Values, Estimated Fair Values and Unrealized Gains and Losses of Investments Classified as Held-to-Maturity
The book values, estimated fair values and unrealized gains and losses of investments classified as held-to-maturity are as follows (in thousands):

  
Book
  
Gross Unrealized
  
Fair
 
March 31, 2017
 
Value
  
Gains
  
Losses
  
Value
 
Obligations of States and Political Subdivisions
 
$
57,281
  
$
414
  
$
22
  
$
57,673
 
Total
 
$
57,281
  
$
414
  
$
22
  
$
57,673
 
 
  
Book
  
Gross Unrealized
  
Fair
 
December 31, 2016
 
Value
  
Gains
  
Losses
  
Value
 
Obligations of States and Political Subdivisions
 
$
58,109
  
$
339
  
$
40
  
$
58,408
 
Total
 
$
58,109
  
$
339
  
$
40
  
$
58,408
 
 
  
Book
  
Gross Unrealized
  
Fair
 
March 31, 2016
 
Value
  
Gains
  
Losses
  
Value
 
Obligations of States and Political Subdivisions
 
$
61,535
  
$
1,357
  
$
-
  
$
62,892
 
Total
 
$
61,535
  
$
1,357
  
$
-
  
$
62,892
 
Amortized Cost and Estimated Fair Values of Investment Securities by Contractual Maturity
The amortized cost and estimated fair values of investment securities at March 31, 2017 by contractual maturity are shown in the following table (in thousands):

  
Available-for-Sale
  
Held-to-Maturity
 
March 31, 2017
 
Amortized
Cost
  
Fair/Book
Value
  
Book
Value
  
Fair
Value
 
Within one year
 
$
36,052
  
$
36,053
  
$
1,260
  
$
1,262
 
After one year through five years
  
65,667
   
65,563
   
9,463
   
9,488
 
After five years through ten years
  
14,304
   
14,181
   
14,010
   
14,100
 
After ten years
  
27,766
   
27,583
   
32,548
   
32,823
 
   
143,789
   
143,380
   
57,281
   
57,673
 
                 
Investment securities not due at a single maturity date:
                
Mortgage-backed securities
  
309,187
   
309,462
   
-
   
-
 
                 
Total
 
$
452,976
  
$
452,842
  
$
57,281
  
$
57,673
 
Investments with Gross Unrealized Losses and Their Market Value Aggregated by Investment Category and Length of Time that Individual Securities Have Been in a Continuous Unrealized Loss Position
The following tables show those investments with gross unrealized losses and their market value aggregated by investment category and length of time that individual securities have been in a continuous unrealized loss position at the dates indicated (in thousands):

  
Less Than 12 Months
  
12 Months or More
  
Total
 
March 31, 2017
 
Fair
Value
  
Unrealized
Loss
  
Fair
Value
  
Unrealized
Loss
  
Fair
Value
  
Unrealized
Loss
 
                   
Securities Available-for-Sale
                  
US Treasury Notes
 
$
69,433
  
$
300
  
$
-
  
$
-
  
$
69,433
  
$
300
 
US Govt SBA
  
26,412
   
247
   
-
   
-
   
26,412
   
247
 
Mortgage Backed Securities
  
168,546
   
1,545
   
-
   
-
   
168,546
   
1,545
 
Total
 
$
264,391
  
$
2,092
  
$
-
  
$
-
  
$
264,391
  
$
2,092
 
                         
Securities Held-to-Maturity
                        
Obligations of States and Political Subdivisions
 
$
4,278
  
$
22
  
$
-
  
$
-
  
$
4,278
  
$
22
 
Total
 
$
4,278
  
$
22
  
$
-
  
$
-
  
$
4,278
  
$
22
 
 
  
Less Than 12 Months
  
12 Months or More
  
Total
 
December 31, 2016
 
Fair
Value
  
Unrealized
Loss
  
Fair
Value
  
Unrealized
Loss
  
Fair
Value
  
Unrealized
Loss
 
                   
Securities Available-for-Sale
                  
US Treasury Notes
 
$
99,429
  
$
332
  
$
-
  
$
-
  
$
99,429
  
$
332
 
US Govt SBA
  
27,483
   
260
   
-
   
-
   
27,483
   
260
 
Mortgage Backed Securities
  
123,157
   
1,313
   
-
   
-
   
123,157
   
1,313
 
Total
 
$
250,069
  
$
1,905
  
$
-
  
$
-
  
$
250,069
  
$
1,905
 
                         
Obligations of States and Political Subdivisions
 
$
7,251
  
$
40
  
$
-
  
$
-
  
$
7,251
  
$
40
 
Total
 
$
7,251
  
$
40
  
$
-
  
$
-
  
$
7,251
  
$
40
 
 
  
Less Than 12 Months
 
12 Months or More
 
Total
 
March 31, 2016
 
Fair
Value
 
Unrealized
Loss
 
Fair
Value
 
Unrealized
Loss
 
Fair
Value
 
Unrealized
Loss
 
                   
Securities Available-for-Sale
                  
Government Agency & Government-Sponsored Entities
 
$
39,996
  
$
1
  
$
-
  
$
-
  
$
39,996
  
$
1
 
Mortgage Backed Securities
  
1,529
   
7
   
-
   
-
   
1,529
   
7
 
Total
 
$
41,525
  
$
8
  
$
-
  
$
-
  
$
41,525
  
$
8
 
Proceeds from Sales and Calls of Securities
Proceeds from sales and calls of securities were as follows:

(in thousands)
 
Proceeds
  
Gains
  
Losses
 
Three Months Ended March 31, 2017
 
$
-
  
$
-
  
$
-
 
Three Months Ended March 31, 2016
 
$
102,895
  
$
244
  
$
533