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Concentrations of Credit Risk (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Concentration Risk [Line Items] |  |
Receivables from Erie Insurance Exchange and affiliates, net | $ 780,473 | $ 707,060
Receivables from Erie Insurance Exchange, allowance for credit loss | 700 | 700
Affiliated Entity |  |
Concentration Risk [Line Items] |  |
Receivables from Erie Insurance Exchange and affiliates, net | $ 780,500 | $ 707,100

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