v3.25.1
Segment Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Segment Reporting Information [Line Items]    
Total operating revenue $ 989,399 $ 880,701
Total operating expenses 838,023 741,889
Operating income 151,376 138,812
Total investment income 19,536 15,079
Other income 3,834 3,411
Income tax expense 36,329 32,750
Net income $ 138,417 $ 124,552
Erie Insurance Exchange    
Segment Reporting Information [Line Items]    
Depreciation and amortization expense reimbursed from the Exchange and its insurance subsidiaries (as a percent) 29.00% 27.00%
Management Operations    
Segment Reporting Information [Line Items]    
Total operating revenue $ 989,399 $ 880,701
Commissions 436,860 375,760
Underwriting and policy processing 51,260 48,168
Information technology 64,785 53,490
Sales and advertising 17,375 17,207
Customer service 11,687 10,080
Administrative and other 45,783 45,617
Total operating expenses 838,023 741,889
Operating income 151,376 138,812
Total investment income 19,536 15,079
Other income 3,834 3,411
Income tax expense 36,329 32,750
Net income 138,417 124,552
Depreciation and amortization expense 15,800 13,300
Management fee revenue | Management Operations    
Segment Reporting Information [Line Items]    
Total operating revenue 772,694 682,620
Administrative services reimbursement revenue    
Segment Reporting Information [Line Items]    
Total operating revenue 210,273 191,567
Total operating expenses 210,273 191,567
Administrative services reimbursement revenue | Management Operations    
Segment Reporting Information [Line Items]    
Total operating revenue 210,273 191,567
Total operating expenses 210,273 191,567
Service agreement revenue    
Segment Reporting Information [Line Items]    
Total operating revenue 6,432 6,514
Service agreement revenue | Management Operations    
Segment Reporting Information [Line Items]    
Total operating revenue 6,432 6,514
Management fee revenue - policy issuance and renewal services    
Segment Reporting Information [Line Items]    
Total operating revenue 755,049 665,686
Total operating expenses 627,750 550,322
Management fee revenue - policy issuance and renewal services | Management Operations    
Segment Reporting Information [Line Items]    
Total operating expenses $ 627,750 $ 550,322