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Insider Trading Arrangements
 3 Months Ended
Mar. 31, 2024
shares
Trading Arrangements, by Individual  
Rule 10b5-1 Arrangement Adopted true
Non-Rule 10b5-1 Arrangement Adopted false
Rule 10b5-1 Arrangement Terminated false
Non-Rule 10b5-1 Arrangement Terminated false
Steven A. Markel [Member]  
Trading Arrangements, by Individual  
Material Terms of Trading Arrangement
On February 20, 2024, Steven A. Markel, Chair of the Board and a Director of the Company, adopted a Rule 10b5-1 trading arrangement that is intended to satisfy the affirmative defense of Rule 10b5-1(c) for the sale of up to 3,000 of the Company's common shares until February 14, 2025 (or the date on which all shares have been sold).
Name Steven A. Markel
Title Chair of the Board and a Director of the Company
Adoption Date February 20, 2024
Termination Date February 14, 2025 (or the date on which all shares have been sold)
Aggregate Available 3,000