v3.26.1
Debt Securities
6 Months Ended
Jun. 30, 2026
Debt Securities, Available-for-Sale [Abstract]  
Debt Securities

Note 3 – Debt Securities

Investments in debt securities, classified as available-for-sale, are as follows:

 

 

Amortized

 

 

Gross unrealized

 

 

Estimated

 

(in millions)

 

cost

 

 

Gains

 

 

Losses

 

 

fair value

 

June 30, 2026

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Treasury bonds

 

$

221.9

 

 

$

 

 

$

(3.2

)

 

$

218.7

 

Municipal bonds

 

 

1,099.9

 

 

 

8.3

 

 

 

(54.9

)

 

 

1,053.3

 

Foreign government bonds

 

 

235.6

 

 

 

1.1

 

 

 

(3.4

)

 

 

233.3

 

Governmental agency bonds

 

 

383.9

 

 

 

0.1

 

 

 

(9.4

)

 

 

374.6

 

Governmental agency mortgage-backed securities

 

 

6,339.9

 

 

 

18.0

 

 

 

(227.3

)

 

 

6,130.6

 

U.S. corporate debt securities

 

 

1,284.9

 

 

 

6.4

 

 

 

(21.4

)

 

 

1,269.9

 

Foreign corporate debt securities

 

 

495.9

 

 

 

5.0

 

 

 

(6.6

)

 

 

494.3

 

 

$

10,062.0

 

 

$

38.9

 

 

$

(326.2

)

 

$

9,774.7

 

December 31, 2025

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Treasury bonds

 

$

244.2

 

 

$

1.0

 

 

$

(1.6

)

 

$

243.6

 

Municipal bonds

 

 

1,003.5

 

 

 

9.9

 

 

 

(53.3

)

 

 

960.1

 

Foreign government bonds

 

 

239.4

 

 

 

1.1

 

 

 

(5.3

)

 

 

235.2

 

Governmental agency bonds

 

 

268.3

 

 

 

0.3

 

 

 

(7.6

)

 

 

261.0

 

Governmental agency mortgage-backed securities

 

 

5,401.9

 

 

 

41.9

 

 

 

(183.0

)

 

 

5,260.8

 

U.S. corporate debt securities

 

 

1,032.8

 

 

 

15.7

 

 

 

(13.7

)

 

 

1,034.8

 

Foreign corporate debt securities

 

 

466.6

 

 

 

9.5

 

 

 

(4.9

)

 

 

471.2

 

 

$

8,656.7

 

 

$

79.4

 

 

$

(269.4

)

 

$

8,466.7

 

Sales of debt securities resulted in realized gains of $1.7 million and $2.9 million, realized losses of $3.2 million and $5.7 million and proceeds of $276.4 million and $543.7 million for the three and six months ended June 30, 2026, respectively. Sales of debt securities resulted in realized gains of $1.4 million and $2.5 million, realized losses of $6.8 million and $9.4 million and proceeds of $240.2 million and $507.0 million for the three and six months ended June 30, 2025, respectively.

Investments in debt securities in an unrealized loss position, and their respective length of time in such position, are as follows:

 

 

Less than 12 months

 

 

12 months or longer

 

 

Total

 

(in millions)

 

Estimated
fair value

 

 

Unrealized
losses

 

 

Estimated
fair value

 

 

Unrealized
losses

 

 

Estimated
fair value

 

 

Unrealized
losses

 

June 30, 2026

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Treasury bonds

 

$

158.9

 

 

$

(2.2

)

 

$

30.5

 

 

$

(1.0

)

 

$

189.4

 

 

$

(3.2

)

Municipal bonds

 

 

296.7

 

 

 

(3.9

)

 

 

430.3

 

 

 

(51.0

)

 

 

727.0

 

 

 

(54.9

)

Foreign government bonds

 

 

40.7

 

 

 

(0.1

)

 

 

38.6

 

 

 

(3.3

)

 

 

79.3

 

 

 

(3.4

)

Governmental agency bonds

 

 

327.1

 

 

 

(4.0

)

 

 

27.3

 

 

 

(5.4

)

 

 

354.4

 

 

 

(9.4

)

Governmental agency mortgage-backed
   securities

 

 

3,497.8

 

 

 

(56.9

)

 

 

1,274.7

 

 

 

(170.4

)

 

 

4,772.5

 

 

 

(227.3

)

U.S. corporate debt securities

 

 

747.5

 

 

 

(9.2

)

 

 

79.4

 

 

 

(12.2

)

 

 

826.9

 

 

 

(21.4

)

Foreign corporate debt securities

 

 

217.0

 

 

 

(2.2

)

 

 

41.7

 

 

 

(4.4

)

 

 

258.7

 

 

 

(6.6

)

 

$

5,285.7

 

 

$

(78.5

)

 

$

1,922.5

 

 

$

(247.7

)

 

$

7,208.2

 

 

$

(326.2

)

December 31, 2025

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Treasury bonds

 

$

61.7

 

 

$

(0.3

)

 

$

36.3

 

 

$

(1.3

)

 

$

98.0

 

 

$

(1.6

)

Municipal bonds

 

 

118.6

 

 

 

(1.1

)

 

 

451.3

 

 

 

(52.2

)

 

 

569.9

 

 

 

(53.3

)

Foreign government bonds

 

 

76.2

 

 

 

(0.3

)

 

 

59.8

 

 

 

(5.0

)

 

 

136.0

 

 

 

(5.3

)

Governmental agency bonds

 

 

210.6

 

 

 

(1.5

)

 

 

28.9

 

 

 

(6.1

)

 

 

239.5

 

 

 

(7.6

)

Governmental agency mortgage-backed
   securities

 

 

988.8

 

 

 

(9.8

)

 

 

1,479.1

 

 

 

(173.2

)

 

 

2,467.9

 

 

 

(183.0

)

U.S. corporate debt securities

 

 

169.4

 

 

 

(0.8

)

 

 

101.2

 

 

 

(12.9

)

 

 

270.6

 

 

 

(13.7

)

Foreign corporate debt securities

 

 

32.3

 

 

 

(0.2

)

 

 

69.0

 

 

 

(4.7

)

 

 

101.3

 

 

 

(4.9

)

 

$

1,657.6

 

 

$

(14.0

)

 

$

2,225.6

 

 

$

(255.4

)

 

$

3,883.2

 

 

$

(269.4

)

Based on the Company’s review of its debt securities in an unrealized loss position it determined that the losses were due to non-credit factors and, therefore, it does not consider these securities to be credit impaired at June 30, 2026.

 

Investments in debt securities at June 30, 2026, by contractual maturities, are as follows:

 

(in millions)

 

Due in one
year or less

 

 

Due after
one through
five years

 

 

Due after
five through
ten years

 

 

Due after
ten years

 

 

Total

 

U.S. Treasury bonds

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortized cost

 

$

26.9

 

 

$

145.8

 

 

$

45.1

 

 

$

4.1

 

 

$

221.9

 

Estimated fair value

 

$

26.7

 

 

$

144.1

 

 

$

44.4

 

 

$

3.5

 

 

$

218.7

 

Municipal bonds

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortized cost

 

 

1.2

 

 

 

143.8

 

 

 

530.1

 

 

 

424.8

 

 

 

1,099.9

 

Estimated fair value

 

 

1.2

 

 

 

141.3

 

 

 

495.2

 

 

 

415.6

 

 

 

1,053.3

 

Foreign government bonds

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortized cost

 

 

101.2

 

 

 

100.4

 

 

 

20.9

 

 

 

13.1

 

 

 

235.6

 

Estimated fair value

 

 

101.7

 

 

 

97.8

 

 

 

21.1

 

 

 

12.7

 

 

 

233.3

 

Governmental agency bonds

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortized cost

 

 

0.6

 

 

 

0.8

 

 

 

226.4

 

 

 

156.1

 

 

 

383.9

 

Estimated fair value

 

 

0.6

 

 

 

0.8

 

 

 

224.0

 

 

 

149.2

 

 

 

374.6

 

U.S. corporate debt securities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortized cost

 

 

4.8

 

 

 

564.6

 

 

 

527.9

 

 

 

187.6

 

 

 

1,284.9

 

Estimated fair value

 

 

4.7

 

 

 

562.2

 

 

 

524.7

 

 

 

178.3

 

 

 

1,269.9

 

Foreign corporate debt securities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortized cost

 

 

18.1

 

 

 

272.4

 

 

 

151.7

 

 

 

53.7

 

 

 

495.9

 

Estimated fair value

 

 

18.1

 

 

 

272.8

 

 

 

152.0

 

 

 

51.4

 

 

 

494.3

 

Total debt securities (excluding mortgage-backed
   securities)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortized cost

 

$

152.8

 

 

$

1,227.8

 

 

$

1,502.1

 

 

$

839.4

 

 

$

3,722.1

 

Estimated fair value

 

$

153.0

 

 

$

1,219.0

 

 

$

1,461.4

 

 

$

810.7

 

 

$

3,644.1

 

Total mortgage-backed securities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortized cost

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6,339.9

 

Estimated fair value

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6,130.6

 

Total debt securities

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortized cost

 

 

 

 

 

 

 

 

 

 

 

 

 

$

10,062.0

 

Estimated fair value

 

 

 

 

 

 

 

 

 

 

 

 

 

$

9,774.7

 

Mortgage-backed securities, which include contractual terms to maturity, are not categorized by contractual maturity as borrowers may have the right to call or prepay obligations with, or without, call or prepayment penalties.

The composition of the debt securities portfolio at June 30, 2026, by credit rating, is as follows:

 

 

 

A- or higher

 

 

BBB+ to BBB-

 

 

Non-Investment Grade

 

 

Total

 

(dollars in millions)

 

Estimated
fair value

 

 

Percentage

 

 

Estimated
fair value

 

 

Percentage

 

 

Estimated
fair value

 

 

Percentage

 

 

Estimated
fair value

 

U.S. Treasury bonds

 

$

218.7

 

 

 

100.0

%

 

$

 

 

 

%

 

$

 

 

 

%

 

$

218.7

 

Municipal bonds

 

 

1,032.5

 

 

 

98.1

 

 

 

20.5

 

 

 

1.9

 

 

 

0.3

 

 

 

 

 

 

1,053.3

 

Foreign government bonds

 

 

224.4

 

 

 

96.2

 

 

 

8.1

 

 

 

3.5

 

 

 

0.8

 

 

 

0.3

 

 

 

233.3

 

Governmental agency bonds

 

 

374.6

 

 

 

100.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

374.6

 

Governmental agency mortgage-
   backed securities

 

 

6,130.6

 

 

 

100.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6,130.6

 

U.S. corporate debt securities

 

 

776.1

 

 

 

61.1

 

 

 

351.4

 

 

 

27.7

 

 

 

142.4

 

 

 

11.2

 

 

 

1,269.9

 

Foreign corporate debt securities

 

 

273.0

 

 

 

55.2

 

 

 

192.7

 

 

 

39.0

 

 

 

28.6

 

 

 

5.8

 

 

 

494.3

 

 

$

9,029.9

 

 

 

92.3

%

 

$

572.7

 

 

 

5.9

%

 

$

172.1

 

 

 

1.8

%

 

$

9,774.7

 

 

Included in debt securities at June 30, 2026 were bank loans totaling $98.8 million, of which $93.2 million were non-investment grade; high yield corporate debt securities totaling $72.7 million, all of which were non-investment grade; and emerging market debt securities totaling $32.3 million, of which $5.9 million were non-investment grade.

 

The composition of the debt securities portfolio in an unrealized loss position at June 30, 2026, by credit rating, is as follows:

 

 

 

A- or higher

 

 

BBB+ to BBB-

 

 

Non-Investment Grade

 

 

Total

 

(dollars in millions)

 

Estimated
fair value

 

 

Percentage

 

 

Estimated
fair value

 

 

Percentage

 

 

Estimated
fair value

 

 

Percentage

 

 

Estimated
fair value

 

U.S. Treasury bonds

 

$

189.4

 

 

 

100.0

%

 

$

 

 

 

%

 

$

 

 

 

%

 

$

189.4

 

Municipal bonds

 

 

712.1

 

 

 

98.0

 

 

 

14.6

 

 

 

2.0

 

 

 

0.3

 

 

 

 

 

 

727.0

 

Foreign government bonds

 

 

73.8

 

 

 

93.1

 

 

 

5.0

 

 

 

6.3

 

 

 

0.5

 

 

 

0.6

 

 

 

79.3

 

Governmental agency bonds

 

 

354.4

 

 

 

100.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

354.4

 

Governmental agency mortgage-
   backed securities

 

 

4,772.5

 

 

 

100.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4,772.5

 

U.S. corporate debt securities

 

 

549.3

 

 

 

66.4

 

 

 

197.6

 

 

 

23.9

 

 

 

80.0

 

 

 

9.7

 

 

 

826.9

 

Foreign corporate debt securities

 

 

160.0

 

 

 

61.8

 

 

 

81.4

 

 

 

31.5

 

 

 

17.3

 

 

 

6.7

 

 

 

258.7

 

 

$

6,811.5

 

 

 

94.5

%

 

$

298.6

 

 

 

4.1

%

 

$

98.1

 

 

 

1.4

%

 

$

7,208.2

 

 

Debt securities in an unrealized loss position at June 30, 2026 included bank loans totaling $58.1 million, of which $55.7 million were non-investment grade; high yield corporate debt securities totaling $38.0 million, all of which were non-investment grade; and emerging market debt securities totaling $17.7 million, of which $4.1 million were non-investment grade.

The credit ratings in the above tables reflect published ratings obtained from globally recognized securities rating agencies. If a security was rated differently among the rating agencies the lowest rating was selected. Governmental agency mortgage-backed securities are not rated by any of the ratings agencies; however, these securities have been included in the above table in the “A- or higher” rating category because the payments of principal and interest are guaranteed by the governmental agency that issued the security.