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Investments (Tables)
6 Months Ended
Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]  
Summary of Amortized Cost and Estimated Fair Values of Fixed Maturities
                                                                                                     
   
Amortized Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
Losses
 
Estimated Fair
Value
   
(in thousands)
Held to Maturity
                               
U.S. Treasury securities and obligations of U.S. government corporations and agencies
 
$
89,716
   
$
2,839
   
$
649
   
$
91,906
 
Obligations of states and political subdivisions
 
 
346,517
   
 
20,073
   
 
788
   
 
365,802
 
Corporate securities
 
 
188,162
   
 
15,061
   
 
267
   
 
202,956
 
Mortgage-backed securities
 
 
19,453
   
 
1,005
   
 
 
 
 
20,458
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Totals
 
$
643,848
   
$
38,978
   
$
1,704
   
$
681,122
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                                                                     
   
Amortized Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
Losses
 
Estimated Fair
Value
   
(in thousands)
Available for Sale
                               
U.S. Treasury securities and obligations of U.S. government corporations and agencies
 
$
22,508
   
$
257
   
$
439
   
$
22,326
 
Obligations of states and political subdivisions
 
 
59,378
   
 
2,366
   
 
31
   
 
61,713
 
Corporate securities
 
 
201,634
   
 
9,644
   
 
202
   
 
211,076
 
Mortgage-backed securities
 
 
222,814
   
 
5,068
   
 
417
   
 
227,465
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Totals
 
$
506,334
   
$
17,335
   
$
1,089
   
$
522,580
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

                                                                                                     
   
Amortized Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
Losses
 
Estimated Fair
Value
   
(in thousands)
Held to Maturity
                               
U.S. Treasury securities and obligations of U.S. government corporations and agencies
 
$
77,435
   
$
3,984
   
$
223
   
$
81,196
 
Obligations of states and political subdivisions
 
 
312,319
   
 
23,212
   
 
143
   
 
335,388
 
Corporate securities
 
 
173,270
   
 
18,172
   
 
206
   
 
191,236
 
Mortgage-backed securities
 
 
23,585
   
 
1,236
   
 
 
 
 
24,821
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Totals
 
$
586,609
   
$
46,604
   
$
572
   
$
632,641
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
                                                                                                     
   
Amortized Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
Losses
 
Estimated Fair
Value
   
(in thousands)
Available for Sale
                               
U.S. Treasury securities and obligations of U.S. government corporations and agencies
 
$
47,512
   
$
424
   
$
121
   
$
47,815
 
Obligations of states and political subdivisions
 
 
66,287
   
 
2,690
   
 
12
   
 
68,965
 
Corporate securities
 
 
202,396
   
 
10,496
   
 
184
   
 
212,708
 
Mortgage-backed securities
 
 
218,763
   
 
6,902
   
 
17
   
 
225,648
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Totals
 
$
534,958
   
$
20,512
   
$
334
   
$
555,136
 
   
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Summary of Amortized Cost and Estimated Fair Value of Fixed Maturities by Contractual Maturity
                                                   
    
Amortized Cost
  
Estimated Fair
Value
    
(in thousands)
Held to maturity
                 
Due in one year or less
  
$
38,641
    
$
39,762
 
Due after one year through five years
  
 
83,282
    
 
88,929
 
Due after five years through ten years
  
 
224,135
    
 
237,348
 
Due after ten years
  
 
278,337
    
 
294,625
 
Mortgage-backed securities
  
 
19,453
    
 
20,458
 
    
 
 
 
  
 
 
 
Total held to maturity
  
$
643,848
    
$
681,122
 
    
 
 
 
  
 
 
 
    
                 
Available for sale
                 
Due in one year or less
  
$
26,146
    
$
26,621
 
Due after one year through five years
  
 
131,837
    
 
138,624
 
Due after five years through ten years
  
 
96,413
    
 
99,711
 
Due after ten years
  
 
29,124
    
 
30,159
 
Mortgage-backed securities
  
 
222,814
    
 
227,465
 
    
 
 
 
  
 
 
 
Total available for sale
  
$
506,334
    
$
522,580
 
    
 
 
 
  
 
 
 
Summary of Cost and Estimated Fair Values of Equity Securities
The cost and estimated fair values of our equity securities at June 30, 2021 were as follows:
 
                                                                                                     
   
Cost
 
Gross Gains
 
Gross Losses
 
Estimated Fair
Value
   
(in thousands)
Equity securities
 
$
50,864
   
$
22,007
   
$
114
   
$
72,757
 
The cost and estimated fair values of our equity securities at December 31, 2020 were as follows:
 
                                                                                                     
   
Cost
 
Gross Gains
 
Gross Losses
 
Estimated Fair
Value
   
(in thousands)
Equity securities
 
$
42,410
   
$
17,103
   
$
957
   
$
58,556
 
Summary of Gross Investment Gains and Losses before Applicable Income Taxes
Gross investment gains and losses before applicable income taxes for the three months and six months ended June 30, 2021 and 2020 were as follows:
 
                                                                                                     
    
Three Months Ended June 30,
  
Six Months Ended June 30,
    
2021
  
2020
  
2021
  
2020
    
(in thousands)
  
(in thousands)
Gross investment gains:
                                   
Fixed maturities
  
$
479
    
$
229
    
$
524
    
$
652
 
Equity securities
  
 
3,762
    
 
6,474
    
 
6,728
    
 
3,355
 
    
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
    
 
4,241
    
 
6,703
    
 
7,252
    
 
4,007
 
    
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Gross investment losses:
                                   
Fixed maturities
  
 
 
  
 
217
    
 
74
    
 
218
 
Equity securities
  
 
 
  
 
 
  
 
468
    
 
7,998
 
    
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
    
 
 
  
 
217
    
 
542
    
 
8,216
 
    
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Net investment gains (losses)
  
$
4,241
    
$
6,486
    
$
6,710
    
$
(4,209
    
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Summary of Fixed Maturities with Unrealized Losses
We held fixed maturities with unrealized losses representing declines that we considered temporary at June 30, 2021 as follows:
 
                                                                                                     
    
Less Than 12 Months
  
More Than 12 Months
    
Fair Value
  
Unrealized Losses
  
Fair Value
  
Unrealized Losses
    
(in thousands)
U.S. Treasury securities and obligations of U.S. government corporations and agencies
  
$
38,202
    
$
1,088
    
$
    
$
 
Obligations of states and political subdivisions
  
 
45,446
    
 
819
    
 
 
  
 
 
Corporate securities
  
 
38,846
    
 
344
    
 
3,375
    
 
125
 
Mortgage-backed securities
  
 
55,930
    
 
415
    
 
487
    
 
2
 
    
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Totals
  
$
178,424
    
$
2,666
    
$
3,862
    
$
127
 
    
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
We held fixed maturities with unrealized losses representing declines that we considered temporary at December 31, 2020 as follows:
 
                                                                                                     
    
Less Than 12 Months
  
More Than 12 Months
    
Fair Value
  
Unrealized Losses
  
Fair Value
  
Unrealized Losses
    
(in thousands)
U.S. Treasury securities and obligations of U.S. government corporations and agencies
  
$
29,144
    
$
345
    
$
    
$
 
Obligations of states and political subdivisions
  
 
9,362
    
 
154
    
 
 
  
 
 
Corporate securities
  
 
26,143
    
 
115
    
 
8,230
    
 
276
 
Mortgage-backed securities
  
 
3,091
    
 
15
    
 
236
    
 
1
 
    
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Totals
  
$
67,740
    
$
629
    
$
8,466
    
$
277