Concentrations of Credit Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Concentration Risk [Line Items]
Receivables from Erie Insurance Exchange and affiliates, net	$ 736,973	$ 625,338
Receivables from Erie Insurance Exchange, allowance for credit loss	600	600
Affiliated Entity
Concentration Risk [Line Items]
Receivables from Erie Insurance Exchange and affiliates, net	$ 737,000	$ 625,300