Related Party	12 Months Ended
Related Party	Dec. 31, 2020
Related Party Transactions [Abstract]
Related Party	Related Party Management fee A management fee is charged to the Exchange for services we provide under the subscriber's agreement with subscribers at the Exchange. The fee is a percentage of direct and affiliated assumed premiums written by the Exchange. This percentage rate is determined at least annually by our Board of Directors but cannot exceed 25%. The management fee rate charged the Exchange was 25% in 2020, 2019 and 2018. The Board of Directors elected to maintain the fee at 25% beginning January 1, 2021. There is no provision in the subscriber's agreement for termination of our appointment as attorney-in-fact by the subscribers at the Exchange and the appointment is not affected by a policyholder's disability or incapacity. Insurance holding company system Most states have enacted legislation that regulates insurance holding company systems, defined as two or more affiliated persons, one or more of which is an insurer. The Exchange has the following wholly owned property and casualty subsidiaries: Erie Insurance Company, Erie Insurance Company of New York, Erie Insurance Property & Casualty Company and Flagship City Insurance Company, and a wholly owned life insurance company, Erie Family Life Insurance Company. Indemnity and the Exchange, and its wholly owned subsidiaries, meet the definition of an insurance holding company system. All transactions within a holding company system affecting the member insurers of the holding company system must be fair and reasonable and any charges or fees for services performed must be reasonable. Approval by the applicable insurance commissioner is required prior to the consummation of transactions affecting the members within a holding company system. Office leases We lease the home office from the Exchange. See Note 8, "Leases". Lease expense totaled $6.1 million in both 2020 and 2019 and $6.0 million in 2018. Operating expenses, including utilities, cleaning, repairs, real estate taxes, and property insurance, totaled $15.7 million, $16.7 million, and $13.5 million in 2020, 2019, and 2018, respectively. The Exchange and its subsidiaries reimburse us for rent costs and related operating expenses of shared facilities used to perform administrative services, which are allocated based upon usage or square footage occupied. Reimbursements related to the use of this space totaled $4.6 million, $4.2 million, and $3.9 million in 2020, 2019, and 2018, respectively. We also had a lease commitment with EFL for a field office until 2018. Annual rentals paid to EFL under this lease totaled $0.4 million in 2018. We previously owned three field offices for which rental costs of shared facilities were allocated based upon usage or square footage occupied. In 2018, we sold the field offices we owned to the Exchange at the current independent appraised value in order to align the ownership interest of these facilities with the functions being performed at these locations, which are claims-related activities. We recognized a gain on the sale of $3.4 million, which is included in "Other (expense) income". Notes receivable from EFL We previously held a $25 million surplus note issued to us by EFL that was payable on demand on or after December 31, 2018. In 2018, EFL, with the appropriate approval from the Pennsylvania Insurance Commissioner, satisfied its obligation and repaid the surplus note. EFL paid related interest to us of $1.6 million in 2018.