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Schedule VI - Supplementary Information Concerning Property-Casualty Insurance Operations | 12 Months Ended
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Dec. 31, 2022
SEC Schedule, 12-18, Supplemental Information, Property-Casualty Insurance Underwriters [Abstract] |
Schedule VI - Supplementary Information Concerning Property-Casualty Insurance Operations | Schedule VI W. R. Berkley Corporation and Subsidiaries Supplementary Information Concerning Property-Casualty Insurance Operations Years Ended December 31, 2022, 2021 and 2020
(In thousands) | 2022 |  | 2021 |  | 2020
Deferred policy acquisition costs | $ | 763,486 |  |  | $ | 676,145 |  |  | $ | 556,168 |
Reserves for losses and loss expenses | 17,011,223 |  |  | 15,390,888 |  |  | 13,784,430 |
Unearned premiums | 5,297,654 |  |  | 4,847,160 |  |  | 4,073,191 |
Net premiums earned | 9,561,429 |  |  | 8,106,031 |  |  | 6,930,843 |
Net investment income | 779,185 |  |  | 671,618 |  |  | 583,821 |
Losses and loss expenses incurred: |  |  |  |  |
Current year | 5,774,713 |  |  | 4,921,191 |  |  | 4,432,937 |
Prior years | 54,511 |  |  | 863 |  |  | 627 |
Loss reserve discount accretion | 32,526 |  |  | 31,906 |  |  | 35,142 |
Amortization of deferred policy acquisition costs | 1,038,903 |  |  | 961,628 |  |  | 904,955 |
Paid losses and loss expenses | 4,347,910 |  |  | 3,665,694 |  |  | 3,598,649 |
Net premiums written | 10,004,070 |  |  | 8,862,867 |  |  | 7,262,437 |
___________________ See Report of Independent Registered Public Accounting Firm.

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- Definition The entire disclosure of supplemental information for registrant, its subsidiary and 50%-or-less-owned equity basis investee, with liability for property-casualty insurance claim. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 18 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-18) -URI http://asc.fasb.org/extlink&oid=120401096&loc=d3e575016-122915 + Details
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