Liability for loss and loss adjustment expenses (Tables)
 3 Months Ended
Mar. 31, 2022
Insurance [Abstract]  
Summary of Liability for Loss and Loss Adjustment Expenses
A summary of the changes in the liability for loss and loss adjustment expenses for the three months ending March 31, 2022 and 2021 is as follows:
March 31,
20222021
Balance at the beginning of the year
$80,267$69,800 
Provision for claims related to:
Current year
$5,656$6,490 
Prior years
(1,045)(3,241)
Total provision for claims
$4,611$3,249 
Paid losses related to:
Current year
$(548)$(222)
Prior years
(1,796)(2,176)
Total paid losses
$(2,344)$(2,398)
Balance at the end of the period
$82,534$70,651 
Provision for claims as a percentage of net written premiums
4.8 %3.0 %