Fair Value Measurement (Assets and Liabilities Measured at Fair Value) (Details) - USD ($)
$ in Thousands |
Sep. 30, 2024 |
Dec. 31, 2023 |
| Assets: |
|
|
| Fixed maturities, available-for-sale |
$ 3,686,132
|
$ 3,493,597
|
| Fixed maturities, trading |
51,774
|
48,324
|
| Equity investments |
134,693
|
151,295
|
| Level 3 |
|
|
| Liabilities: |
|
|
| Other liabilities |
0
|
6,500
|
| U.S. Treasury obligations |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
251,301
|
243,525
|
| U.S. Government-sponsored enterprise obligations |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
16,024
|
18,724
|
| State and municipal bonds |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
467,779
|
454,381
|
| Corporate debt, limited observable inputs | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
74,808
|
82,377
|
| Residential mortgage-backed securities |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
494,095
|
430,137
|
| Agency commercial mortgage-backed securities |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
7,251
|
8,387
|
| Other commercial mortgage-backed securities |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
200,389
|
189,474
|
| Other asset-backed securities |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
478,873
|
398,395
|
| Recurring |
|
|
| Assets: |
|
|
| Total assets categorized within the fair value hierarchy |
4,344,205
|
4,240,936
|
| Recurring | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Fixed maturities, trading |
51,774
|
48,324
|
| Other assets |
788
|
3,876
|
| Total assets categorized within the fair value hierarchy |
4,106,046
|
3,995,481
|
| Liabilities: |
|
|
| Other liabilities |
1,610
|
10,530
|
| Total liabilities categorized within the fair value hierarchy |
1,610
|
10,530
|
| Recurring | Level 1 |
|
|
| Assets: |
|
|
| Fixed maturities, trading |
0
|
0
|
| Other assets |
0
|
0
|
| Total assets categorized within the fair value hierarchy |
288,884
|
307,270
|
| Liabilities: |
|
|
| Other liabilities |
1,610
|
4,030
|
| Total liabilities categorized within the fair value hierarchy |
1,610
|
4,030
|
| Recurring | Level 2 |
|
|
| Assets: |
|
|
| Fixed maturities, trading |
51,774
|
48,324
|
| Other assets |
788
|
3,876
|
| Total assets categorized within the fair value hierarchy |
3,734,641
|
3,591,057
|
| Liabilities: |
|
|
| Other liabilities |
0
|
0
|
| Total liabilities categorized within the fair value hierarchy |
0
|
0
|
| Recurring | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, trading |
0
|
0
|
| Other assets |
0
|
0
|
| Total assets categorized within the fair value hierarchy |
82,521
|
97,154
|
| Liabilities: |
|
|
| Other liabilities |
0
|
6,500
|
| Total liabilities categorized within the fair value hierarchy |
0
|
6,500
|
| Recurring | U.S. Treasury obligations | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
251,301
|
243,525
|
| Recurring | U.S. Treasury obligations | Level 1 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | U.S. Treasury obligations | Level 2 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
251,301
|
243,525
|
| Recurring | U.S. Treasury obligations | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | U.S. Government-sponsored enterprise obligations | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
16,024
|
18,724
|
| Recurring | U.S. Government-sponsored enterprise obligations | Level 1 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | U.S. Government-sponsored enterprise obligations | Level 2 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
16,024
|
18,724
|
| Recurring | U.S. Government-sponsored enterprise obligations | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | State and municipal bonds | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
467,779
|
454,381
|
| Recurring | State and municipal bonds | Level 1 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | State and municipal bonds | Level 2 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
467,779
|
454,381
|
| Recurring | State and municipal bonds | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | Corporate debt, multiple observable inputs | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
1,695,612
|
1,668,197
|
| Recurring | Corporate debt, multiple observable inputs | Level 1 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | Corporate debt, multiple observable inputs | Level 2 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
1,695,612
|
1,668,197
|
| Recurring | Corporate debt, multiple observable inputs | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | Corporate debt, limited observable inputs | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
74,808
|
82,377
|
| Recurring | Corporate debt, limited observable inputs | Level 1 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | Corporate debt, limited observable inputs | Level 2 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | Corporate debt, limited observable inputs | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
74,808
|
82,377
|
| Recurring | Residential mortgage-backed securities | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
494,095
|
430,137
|
| Recurring | Residential mortgage-backed securities | Level 1 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | Residential mortgage-backed securities | Level 2 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
493,095
|
429,883
|
| Recurring | Residential mortgage-backed securities | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
1,000
|
254
|
| Recurring | Agency commercial mortgage-backed securities | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
7,251
|
8,387
|
| Recurring | Agency commercial mortgage-backed securities | Level 1 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | Agency commercial mortgage-backed securities | Level 2 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
7,251
|
8,387
|
| Recurring | Agency commercial mortgage-backed securities | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | Other commercial mortgage-backed securities | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
200,389
|
189,474
|
| Recurring | Other commercial mortgage-backed securities | Level 1 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | Other commercial mortgage-backed securities | Level 2 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
200,389
|
188,464
|
| Recurring | Other commercial mortgage-backed securities | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
1,010
|
| Recurring | Other asset-backed securities | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
478,873
|
398,395
|
| Recurring | Other asset-backed securities | Level 1 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
0
|
0
|
| Recurring | Other asset-backed securities | Level 2 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
477,149
|
395,245
|
| Recurring | Other asset-backed securities | Level 3 |
|
|
| Assets: |
|
|
| Fixed maturities, available-for-sale |
1,724
|
3,150
|
| Recurring | Financial | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Equity investments |
12,602
|
12,042
|
| Recurring | Financial | Level 1 |
|
|
| Assets: |
|
|
| Equity investments |
10,001
|
9,464
|
| Recurring | Financial | Level 2 |
|
|
| Assets: |
|
|
| Equity investments |
2,323
|
2,287
|
| Recurring | Financial | Level 3 |
|
|
| Assets: |
|
|
| Equity investments |
278
|
291
|
| Recurring | Utilities/Energy | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Equity investments |
788
|
1,256
|
| Recurring | Utilities/Energy | Level 1 |
|
|
| Assets: |
|
|
| Equity investments |
788
|
1,256
|
| Recurring | Utilities/Energy | Level 2 |
|
|
| Assets: |
|
|
| Equity investments |
0
|
0
|
| Recurring | Utilities/Energy | Level 3 |
|
|
| Assets: |
|
|
| Equity investments |
0
|
0
|
| Recurring | Industrial | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Equity investments |
4,211
|
4,946
|
| Recurring | Industrial | Level 1 |
|
|
| Assets: |
|
|
| Equity investments |
0
|
0
|
| Recurring | Industrial | Level 2 |
|
|
| Assets: |
|
|
| Equity investments |
0
|
0
|
| Recurring | Industrial | Level 3 |
|
|
| Assets: |
|
|
| Equity investments |
4,211
|
4,946
|
| Recurring | Bond funds | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Equity investments |
104,919
|
114,901
|
| Recurring | Bond funds | Level 1 |
|
|
| Assets: |
|
|
| Equity investments |
104,919
|
114,901
|
| Recurring | Bond funds | Level 2 |
|
|
| Assets: |
|
|
| Equity investments |
0
|
0
|
| Recurring | Bond funds | Level 3 |
|
|
| Assets: |
|
|
| Equity investments |
0
|
0
|
| Recurring | All other | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Equity investments |
12,173
|
18,150
|
| Recurring | All other | Level 1 |
|
|
| Assets: |
|
|
| Equity investments |
12,173
|
18,150
|
| Recurring | All other | Level 2 |
|
|
| Assets: |
|
|
| Equity investments |
0
|
0
|
| Recurring | All other | Level 3 |
|
|
| Assets: |
|
|
| Equity investments |
0
|
0
|
| Recurring | Short-term investments | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Short-term and other investments |
230,575
|
235,785
|
| Recurring | Short-term investments | Level 1 |
|
|
| Assets: |
|
|
| Short-term and other investments |
161,003
|
163,499
|
| Recurring | Short-term investments | Level 2 |
|
|
| Assets: |
|
|
| Short-term and other investments |
69,572
|
72,286
|
| Recurring | Short-term investments | Level 3 |
|
|
| Assets: |
|
|
| Short-term and other investments |
0
|
0
|
| Recurring | Other investments | Fair Value, Inputs, Level 1, 2 and 3 |
|
|
| Assets: |
|
|
| Short-term and other investments |
2,084
|
62,604
|
| Recurring | Other investments | Level 1 |
|
|
| Assets: |
|
|
| Short-term and other investments |
0
|
0
|
| Recurring | Other investments | Level 2 |
|
|
| Assets: |
|
|
| Short-term and other investments |
1,584
|
57,478
|
| Recurring | Other investments | Level 3 |
|
|
| Assets: |
|
|
| Short-term and other investments |
500
|
5,126
|
| Recurring | Equity investments | Fair Value Measured at Net Asset Value Per Share | Investment in unconsolidated subsidiaries |
|
|
| Assets: |
|
|
| Total assets categorized within the fair value hierarchy |
$ 238,159
|
$ 245,455
|