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Schedule III - Supplementary Insurance Information | 12 Months Ended
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Dec. 31, 2019
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract] |
Schedule III - Supplementary Insurance Information | DONEGAL GROUP INC. AND SUBSIDIARIES SCHEDULE III — SUPPLEMENTARY INSURANCE INFORMATION Years Ended December 31, 2019, 2018 and 2017 ($ in thousands)
Segment |  | Net Premiums Earned |  |  | Net Investment Income |  |  | Net Losses and Loss Expenses |  |  | Amortization of Deferred Policy Acquisition Costs |  |  | Other Underwriting Expenses |  |  | Net Premiums Written |
Year Ended December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial lines |  | $ | 385,465 |  |  | $ | — |  |  | $ | 242,685 |  |  | $ | 62,424 |  |  | $ | 61,631 |  |  | $ | 404,879 |
Personal lines |  |  | 370,613 |  |  |  | — |  |  |  | 263,703 |  |  |  | 60,019 |  |  |  | 52,931 |  |  |  | 347,722 |
Investments |  |  | — |  |  |  | 29,515 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
|  | $ | 756,078 |  |  | $ | 29,515 |  |  | $ | 506,388 |  |  | $ | 122,443 |  |  | $ | 114,562 |  |  | $ | 752,601 |
Year Ended December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial lines |  | $ | 337,924 |  |  | $ | — |  |  | $ | 246,048 |  |  | $ | 55,143 |  |  | $ | 51,635 |  |  | $ | 349,895 |
Personal lines |  |  | 403,367 |  |  |  | — |  |  |  | 330,410 |  |  |  | 65,821 |  |  |  | 61,635 |  |  |  | 394,121 |
Investments |  |  | — |  |  |  | 26,908 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
|  | $ | 741,291 |  |  | $ | 26,908 |  |  | $ | 576,458 |  |  | $ | 120,964 |  |  | $ | 113,270 |  |  | $ | 744,016 |
Year Ended December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial lines |  | $ | 318,391 |  |  | $ | — |  |  | $ | 197,344 |  |  | $ | 52,149 |  |  | $ | 52,817 |  |  | $ | 329,116 |
Personal lines |  |  | 384,124 |  |  |  | — |  |  |  | 289,924 |  |  |  | 62,916 |  |  |  | 63,721 |  |  |  | 400,023 |
Investments |  |  | — |  |  |  | 23,527 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
|  | $ | 702,515 |  |  | $ | 23,527 |  |  | $ | 487,268 |  |  | $ | 115,065 |  |  | $ | 116,538 |  |  | $ | 729,139 |
|  | At December 31, |
Segment |  | Deferred Policy Acquisition Costs |  |  | Liability For Losses and Loss Expenses |  |  | Unearned Premiums |  |  | Other Policy Claims and Benefits Payable |
2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial lines |  | $ | 30,947 |  |  | $ | 582,682 |  |  | $ | 266,297 |  |  | $ | — |
Personal lines |  |  | 28,338 |  |  |  | 286,992 |  |  |  | 243,850 |  |  |  | — |
Investments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
|  | $ | 59,285 |  |  | $ | 869,674 |  |  | $ | 510,147 |  |  | $ | — |
2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial lines |  | $ | 27,762 |  |  | $ | 518,127 |  |  | $ | 231,990 |  |  | $ | — |
Personal lines |  |  | 32,853 |  |  |  | 296,538 |  |  |  | 274,539 |  |  |  | — |
Investments |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
|  | $ | 60,615 |  |  | $ | 814,665 |  |  | $ | 506,529 |  |  | $ | — |

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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=34713774&loc=d3e574960-122915 + Details
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