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Income Taxes - Components of deferred tax assets and liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Deferred income tax assets: |  |
Net operating loss | $ 76,665 | $ 87,960
Discounting of net loss reserves | 77,556 | 72,001
Net unearned premium reserve | 96,581 | 75,483
Compensation liabilities | 55,269 | 28,062
Foreign tax credit carryforward | 16,738 | 20,058
Bad debt reserves | 17,365 | 10,252
Depreciation and amortization | 141,409 | 115,041
Lease liability | 26,681 | 21,453
Net unrealized decline of investments | 192,949 | 0
Lloyds year of account deferral | 1,385 | 0
Other, net | 14,450 | 703
Deferred tax assets before valuation allowance | 717,048 | 431,013
Valuation allowance | (6,968) | (43,953)
Deferred tax assets net of valuation allowance | 710,080 | 387,060
Deferred income tax liabilities: |  |
Deposit accounting liability | (2,658) | (1,578)
Goodwill and intangibles | (38,905) | (70,549)
Lloyds year of account deferral | 0 | (12,514)
Contingency reserve | (43,870) | (49,486)
Deferred policy acquisition costs | (63,708) | (25,612)
Investment related | (9,225) | (7,492)
Net unrealized appreciation of investments | 0 | (8,377)
Right-of-use asset | (20,781) | (17,406)
Total deferred tax liabilities | (179,147) | (193,014)
Net deferred income tax assets | $ 530,933 | $ 194,046

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