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Investments - Unrealized losses (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | $ 380,802 | $ 105,252
Less than 12 Months, Unrealized Losses | (5,548) | (1,085)
12 Months or More, Fair Value | 54,913 | 81,237
12 Months or More, Unrealized Losses | (624) | (1,195)
Total Fair Value | 435,715 | 186,489
Total Unrealized Losses | (6,172) | (2,280)
Obligations of states and political subdivisions |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 126,701 | 36,209
Less than 12 Months, Unrealized Losses | (2,349) | (339)
12 Months or More, Fair Value | 0 | 0
12 Months or More, Unrealized Losses | 0 | 0
Total Fair Value | 126,701 | 36,209
Total Unrealized Losses | (2,349) | (339)
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 74,656 | 30,755
Less than 12 Months, Unrealized Losses | (509) | (385)
12 Months or More, Fair Value | 42,022 | 77,337
12 Months or More, Unrealized Losses | (310) | (1,095)
Total Fair Value | 116,678 | 108,092
Total Unrealized Losses | (819) | (1,480)
Private label mortgage and asset backed securities |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 152,197 | 25,407
Less than 12 Months, Unrealized Losses | (2,438) | (242)
12 Months or More, Fair Value | 12,891 | 0
12 Months or More, Unrealized Losses | (314) | 0
Total Fair Value | 165,088 | 25,407
Total Unrealized Losses | (2,752) | (242)
Corporate debt securities |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 27,248 |
Less than 12 Months, Unrealized Losses | (252) |
12 Months or More, Fair Value | 0 |
12 Months or More, Unrealized Losses | 0 |
Other equity securities |  |
Schedule of Available-for-sale Securities |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 27,248 | 16,781
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss | $ 252 | 219
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value |  | 12,881
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss |  | 119
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value |  | 3,900
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss |  | $ 100

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