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Schedule III - Supplementary Insurance Information | 12 Months Ended
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Dec. 31, 2020
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract] |
Schedule III - Supplementary Insurance Information | Schedule III - Supplementary Insurance Information (as adjusted - see Note 3) For the years ended December 31, 2020, 2019 and 2018
| As of and for the year ended December 31, 2020
| Deferred acquisition costs, net | Loss and loss adjustment expense reserves | Unearned premium | Net premiums earned | Net investment income |  | Loss and loss adjustment expenses incurred, net | Amortization of deferred acquisition costs, net | Other operating expenses | Net premiums written
A&H | $ | 95 |  | $ | 3,742 |  | $ | 1,015 |  | $ | 3,207 |  | $ | — |  |  | $ | 3,319 |  | $ | 313 |  | $ | 114 |  | $ | 3,392 |
Specialty | 65,848 |  | 948,392 |  | 247,538 |  | 407,951 |  | — |  |  | 342,596 |  | 112,464 |  | 18,744 |  | 349,783 |
Property | 2,597 |  | 138,309 |  | 32,904 |  | 171,556 |  | — |  |  | 119,455 |  | 48,744 |  | 6,036 |  | 160,075 |
Runoff & Other | 10 |  | 219,625 |  | 3,378 |  | 28,138 |  | — |  |  | (72) |  | 25,541 |  | 5,906 |  | 28,946 |
Corporate(1) | — |  | — |  | — |  | — |  | 278,938 |  |  | — |  | — |  | 41,215 |  | — |
| $ | 68,550 |  | $ | 1,310,068 |  | $ | 284,835 |  | $ | 610,852 |  | $ | 278,938 |  |  | $ | 465,298 |  | $ | 187,062 |  | $ | 72,015 |  | $ | 542,196 |
| As of and for the year ended December 31, 2019
| Deferred acquisition costs, net | Loss and loss adjustment expense reserves | Unearned premium | Net premiums earned | Net investment income |  | Loss and loss adjustment expenses incurred, net | Amortization of deferred acquisition costs, net | Other operating expenses | Net premiums written
A&H | $ | 110 |  | $ | 2,923 |  | $ | 830 |  | $ | 4,665 |  | $ | — |  |  | $ | 3,907 |  | $ | 365 |  | $ | 156 |  | $ | 4,587 |
Specialty | 81,586 |  | 773,141 |  | 297,700 |  | 465,426 |  | — |  |  | 313,750 |  | 149,497 |  | 20,144 |  | 412,085 |
Property | 10,465 |  | 99,106 |  | 35,050 |  | 141,477 |  | — |  |  | 90,577 |  | 54,769 |  | 4,722 |  | 152,729 |
Runoff & Other | 3 |  | 236,522 |  | 2,570 |  | 88,574 |  | — |  |  | (4,735) |  | 90,995 |  | 9,075 |  | 87,637 |
Corporate(1) | — |  | — |  | — |  | — |  | 282,560 |  |  | — |  | — |  | 36,285 |  | — |
| $ | 92,164 |  | $ | 1,111,692 |  | $ | 336,150 |  | $ | 700,142 |  | $ | 282,560 |  |  | $ | 403,499 |  | $ | 295,626 |  | $ | 70,382 |  | $ | 657,038 |
| As of and for the year ended December 31, 2018
| Deferred acquisition costs, net | Loss and loss adjustment expense reserves | Unearned premium | Net premiums earned | Net investment loss |  | Loss and loss adjustment expenses incurred, net | Amortization of deferred acquisition costs, net | Other operating expenses | Net premiums written
A&H | $ | 114 |  | $ | 2,122 |  | $ | 907 |  | $ | 3,098 |  | $ | — |  |  | $ | 2,624 |  | $ | 540 |  | $ | 93 |  | $ | 3,225 |
Specialty | 105,961 |  | 599,142 |  | 350,370 |  | 466,524 |  | — |  |  | 315,632 |  | 156,533 |  | 18,314 |  | 485,522 |
Property | 10,858 |  | 49,980 |  | 22,966 |  | 77,208 |  | — |  |  | 59,411 |  | 37,235 |  | 2,315 |  | 83,051 |
Runoff & Other | 13 |  | 285,916 |  | 3,507 |  | 74,612 |  | — |  |  | 60,747 |  | 12,190 |  | 8,945 |  | 74,220 |
Corporate(1) | — |  | — |  | — |  | — |  | (251,433) |  |  | — |  | — |  | 16,184 |  | — |
| $ | 116,946 |  | $ | 937,160 |  | $ | 377,750 |  | $ | 621,442 |  | $ | (251,433) |  |  | $ | 438,414 |  | $ | 206,498 |  | $ | 45,851 |  | $ | 646,018 |
(1)Corporate is comprised of non-underwriting income and expenses.

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- Definition The entire disclosure for supplementary insurance information by segment. Includes, but is not limited to, deferred policy acquisition cost; future policy benefit, loss, claim and loss expenses; unearned premium; other policy claim and benefit payable; premium revenue; net investment income; benefit, claim, loss and settlement expenses; amortization of deferred policy acquisition cost; other operating expense; and premium written. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 235 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-16) -URI http://asc.fasb.org/extlink&oid=120401096&loc=d3e574960-122915 + Details
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