Concentrations of Credit Risk (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Concentration Risk [Line Items]
Receivables from Erie Insurance Exchange and affiliates, net	$ 620,683	$ 524,937
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	$ 620,700	$ 524,900