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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Broker concentration risk | The following table summarizes the percentage of the Company’s gross premiums written generated from or placed by the largest brokers:
Broker |  | Year Ended December 31,
| 2020 |  | 2019 |  | 2018
Marsh & McLennan Companies and its subsidiaries |  | 13.3 | % |  | 9.6 | % |  | 9.3 | %
Aon Corporation and its subsidiaries |  | 12.0 | % |  | 12.2 | % |  | 11.4 | %

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