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Income Taxes (Net Deferred Income Tax Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
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Income Taxes [Abstract] |  |
Loss reserve | $ 129,861 | $ 96,840
Unearned premium reserve | 107,724 | 85,028
Foreign tax credits | 30,885 | 31,989
Net operating loss carryforward | 21,787 | 46,109
Lease liability | 20,228 | 33,504
Net unrealized losses on benefit plans | 13,395 | 19,636
Equity compensation | 7,558 | 7,367
Other tax credits | 6,160 | 1,121
Uncollectible reinsurance reserves | 4,486 | 603
Investment impairments | 3,142 | 3,142
Unrealized foreign currency losses | 213 | 4,591
Other assets | 8,973 | 7,285
Total deferred tax assets | 354,412 | 337,215
Net unrealized investment gains | 99,395 | 79,994
Deferred acquisition costs | 97,974 | 75,692
Net fair value income | 56,699 | 26,119
Right of use asset | 36,615 | 90,268
Partnership investments | 27,111 | 28,822
Benefit plan asset | 1,667 | 1,765
Other liabilities | 9,963 | 6,710
Total deferred tax liabilities | 329,424 | 309,370
Net deferred tax assets | 24,988 | 27,845
Less: Valuation allowance | (17,765) | (28,805)
Total net deferred tax assets | $ 7,223 |
Total net deferred tax (liabilities) |  | $ (960)

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