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Reinsurance (Tables) | 12 Months Ended
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Dec. 31, 2020
Insurance [Abstract] |
Schedule of the Effect of Reinsurance on Premiums Written and Earned | The effect of reinsurance on premiums written and earned in 2020, 2019 and 2018 was as follows:
|  | 2020 Premiums |  |  | 2019 Premiums |  |  | 2018 Premiums |
|  | Written |  |  | Earned |  |  | Written |  |  | Earned |  |  | Written |  |  | Earned |
|  | (in thousands) |
Gross |  | $ | 303,090 |  |  | $ | 314,703 |  |  | $ | 333,460 |  |  | $ | 341,883 |  |  | $ | 351,696 |  |  | $ | 359,670 |
Ceded |  |  | (10,276 | ) |  |  | (10,276 | ) |  |  | (8,995 | ) |  |  | (8,995 | ) |  |  | (9,344 | ) |  |  | (9,344 | )
Net premiums |  | $ | 292,814 |  |  | $ | 304,427 |  |  | $ | 324,465 |  |  | $ | 332,888 |  |  | $ | 342,352 |  |  | $ | 350,326 |
Schedule of the Amounts Recoverable from Reinsurers | The amounts recoverable from reinsurers consist of the following:
|  | December 31, |
|  | 2020 |  |  | 2019 |
|  | (in thousands) |
Unpaid losses recoverable: |  |  |  |  |  |  |  |
Case basis |  | $ | 88,622 |  |  | $ | 82,252 |
Incurred but not reported |  |  | 17,085 |  |  |  | 13,090 |
Paid losses recoverable |  |  | 548 |  |  |  | 571 |
Allowance for credit losses |  |  | (452 | ) |  |  | — |
Total |  | $ | 105,803 |  |  | $ | 95,913 |
Schedule of Unsecured Reinsurance Recoverables from Reinsurers |
Reinsurer |  | A.M. Best Rating |  | Amounts Recoverable as of December 31, 2020 |
|  |  |  | (in thousands) |
Hannover Reinsurance (Ireland) Limited (1) |  | A+ |  | $ | 56,753 |
Allianz Risk Transfer AG (Bermuda) |  | A+ |  |  | 12,050 |
Odyssey America Reinsurance Corporation |  | A |  |  | 8,688 |
Minnesota Workers' Compensation Reinsurance Association (1) |  | NR |  |  | 6,367 |
Other reinsurers |  |  |  |  | 22,397 |
Total amounts recoverable from reinsurers |  |  |  |  | 106,255 |
Allowance for credit losses |  |  |  |  | (452 | )
Total amounts recoverable from reinsurers net of allowance for credit losses |  |  |  |  | 105,803 |
Funds withheld and letters of credit related to the above recoverables |  |  |  |  | (71,986 | )
Total unsecured amounts recoverable from reinsurers |  |  |  | $ | 33,817 |
(1) | Current participant in our 2021 reinsurance program.
Change in Allowance for Credit Losses on Amounts Recoverable from Reinsurers | The table below presents the change in the allowance for credit losses on amounts recoverable from reinsurers for the year ended December 31, 2020.
|  | Year Ended December 31, |
|  | 2020 |
|  | (in thousands) |
Balance, beginning of period |  | $ | 444 |
Provision for credit loss benefit |  |  | 8 |
Balance, end of period |  | $ | 452 |

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