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Investment Securities (Tables)
3 Months Ended
Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]  
Summary of Amortized Cost and Estimated Fair Value of Investment Securities
 
March 31, 2020
 
   Amortized   
Cost
 
 
Gross
  
 
 
 
 
 Unrealized
 
 
 
 
 
 
 
Holding
Gain
 
 
Gross
 
 
 
 
 
Unrealized  
 
 

Holding
Loss
 
  
 
 
 
 
Fair Value  
 
 
 
 
 
 
 
Total Percent
 
 
 
(Dollars in thousands)
Investment securities
available-for-sale:
   
     
     
     
     
Mortgage-backed securities
    $
1,118,385
      $
43,546
      $
-
      $
1,161,931
     
69.18%
CMO/REMIC
   
466,033
     
14,060
     
-
     
480,093
     
28.58%
Municipal bonds
   
36,119
     
913
     
-
     
37,032
     
2.20%
Other securities
   
699
     
-
     
-
     
699
     
0.04%
                                       
Total
available-for-sale
securities
    $
1,621,236
      $
58,519
      $
-
      $
1,679,755
     
100.00%
                                       
Investment securities
held-to-maturity:
   
     
     
     
     
Government agency/GSE
    $
111,452
      $
3,468
      $
(207)
      $
114,713
     
17.35%
Mortgage-backed securities
   
161,983
     
8,182
     
-
     
170,165
     
25.22%
CMO/REMIC
   
184,316
     
591
     
(98)
     
184,809
     
28.70%
Municipal bonds
   
184,504
     
4,054
     
(426)
     
188,132
     
28.73%
                                       
Total
held-to-maturity
securities
    $
642,255
      $
16,295
      $
(731)
      $
657,819
     
100.00%
                                       
     
 
December 31, 2019
 
   Amortized   
Cost
 
Gross
   Unrealized   
Holding
Gain
 
 
Gross
   Unrealized   
Holding
Loss
 
   Fair Value   
 
Total Percent
 
 
(Dollars in thousands)
Investment securities
available-for-sale:
   
     
     
     
     
Mortgage-backed securities
    $
1,185,757
      $
21,306
      $
(750)
      $
1,206,313
     
69.32%
CMO/REMIC
   
493,214
     
1,392
     
(896)
     
493,710
     
28.37%
Municipal bonds
   
38,506
     
850
     
(2)
     
39,354
     
2.26%
Other securities
   
880
     
-
     
-
     
880
     
0.05%
                                       
Total
available-for-sale
securities
    $
1,718,357
      $
23,548
      $
(1,648)
      $
1,740,257
     
100.00%
                                       
Investment securities
held-to-maturity:
   
     
     
     
     
Government agency/GSE
    $
117,366
      $
2,280
      $
(657)
      $
118,989
     
17.40%
Mortgage-backed securities
   
168,479
     
2,083
     
(54)
     
170,508
     
24.98%
CMO/REMIC
   
192,548
     
-
     
(2,458)
     
190,090
     
28.55%
Municipal bonds
   
196,059
     
3,867
     
(565)
     
199,361
     
29.07%
                                       
Total
held-to-maturity
securities
    $
674,452
      $
8,230
      $
(3,734)
      $
678,948
     
100.00%
                                       
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Summary of Interest Income Earned on Investment Securities
The following table provides information about the amount of interest income earned on investment securities which is fully taxable and which is exempt from regular federal income tax.
 
    Three Months Ended    
March 31,
 
 
2020
 
 
2019
 
 
 
(Dollars in thousands)
Investment securities
available-for-sale:
   
     
 
Taxable
    $
9,825
      $
10,309
 
Tax-advantaged
   
224
     
336
 
                 
Total interest income from
available-for-sale
securities
   
10,049
     
10,645
 
                 
Investment securities
held-to-maturity:
   
     
 
Taxable
   
2,698
     
2,910
 
Tax-advantaged
   
1,300
     
1,615
 
                 
Total interest income from
held-to-maturity
securities
   
3,998
     
4,525
 
                 
Total interest income from investment securities
    $
14,047
      $
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
15,170
 
                 
 
 
 
 
 
 
 
 
 
 
 
 
 
Summary of Continuous Unrealized Loss Position of Securities
The tables below show the Company’s investment securities’ gross unrealized losses and fair value by investment category and length of time that individual securities have been in a continuous unrealized loss position at
December 31, 2019, prior to adoption of ASU 2016-13. Management
previously
 reviewed individual securities to determine whether a decline in fair value below the amortized cost basis is other-than-temporary. The unrealized losses on these securities were primarily attributed to changes in interest rates. The issuers of these securities have not, to our knowledge, evidenced any cause for default on these securities. These securities have fluctuated in value since their purchase dates as market interest rates have fluctuated. However, we have the ability and the intention to hold these securities until their fair values recover to cost or maturity. As such, management does not deem these securities to be other-than-temporarily-impaired
.
 
 
December
 31, 2019
 
    Less Than 12 Months    
 
    12 Months or Longer    
 
    Total    
 
Fair Value
 
Gross
Unrealized
Holding
Losses
 
Fair Value
 
Gross
Unrealized
Holding
Losses
 
Fair Value
 
Gross
Unrealized
Holding
Losses
 
 
 
(Dollars in thousands)
Investment securities
available-for-sale:
   
     
     
     
     
     
 
Mortgage-backed securities
    $
 
 
20,289
      $
(6
    $
97,964
      $
(744
    $
118,253
      $
(750
CMO/REMIC
   
177,517
     
(705
   
34,565
     
(191
   
212,082
     
(896
Municipal bonds
   
-
     
-
     
563
     
(2
   
563
     
(2
                                                 
Total
available-for-sale
securities
    $
 
 
 
197,806
      $
(711
    $
 
 
 
133,092
      $
(937
    $
 
 
 
 
330,898
      $
(1,648
                                                 
Investment securities
held-to-maturity:
   
     
     
     
     
     
 
Government agency/GSE
    $
28,359
      $
(252
    $
19,405
      $
(405
    $
47,764
      $
(657
Mortgage-backed securities
   
10,411
     
(54
   
-
     
-
     
10,411
     
(54
CMO/REMIC
   
23,897
     
(104
   
166,193
     
(2,354
   
190,090
     
(2,458
Municipal bonds
   
7,583
     
(32
   
29,981
     
(533
   
37,564
     
(565
                                                 
Total
held-to-maturity
securities
    $
70,250
      $
 
 
 
 
 
 
 
 
(442
    $
215,579
      $
 
 
 
 
 
 
(3,292
    $
285,829
      $
 
 
 
 
 
 
 
 
 
(3,734
                                                 
 
 
 
 
 
 
 
 
 
Summary of Amortized Cost and Fair Value of Debt Securities by Contractual Maturity Mortgage-backed and CMO/REMIC securities are included in maturity categories based upon estimated average lives
,
which incorporate estimated prepayment speeds.
                                 
 
March 31, 2020
 
 
Available-for-sale
   
Held-to-maturity
 
 
  Amortized  
Cost
 
 
  Fair Value  
 
 
  Amortized  
Cost
 
 
  Fair Value  
 
 
 
(Dollars in thousands)
 
Due in one year or less
    $
13,043
      $
13,160
      $
768
      $
788
 
Due after one year through five years
   
1,376,413
     
1,427,373
     
358,973
     
367,734
 
Due after five years through ten years
   
176,690
     
182,573
     
103,004
     
104,787
 
Due after ten years
   
55,090
     
56,649
     
179,510
     
184,510
 
                                 
Total investment securities
    $
 
 
 
 
1,621,236
      $
 
 
 
 
 
 
 
 
 
1,679,755
      $
 
 
 
 
 
 
 
 
 
 
 
 
 
 
642,255
      $
 
 
 
 
 
 
 
 
657,819