Related Party Transactions	9 Months Ended
Related Party Transactions	Sep. 30, 2020
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The significant shareholder of the Company has an ownership interest in AmTrust and ACP Re. The Company is a party to the following transactions with these related entities: Equity Method Investments The Company has an ownership interest in an LSC Entity, limited liability companies and limited partnerships with related parties. See Note 4, “Investments - Equity Method Investments - Related Parties” for additional information. Agreements with ACP Re Credit Agreement The Company is party to a credit agreement (the “ACP Re Credit Agreement”) by and among AmTrust, as administrative agent, ACP Re Holdings, LLC, a Delaware limited liability company owned by a related party trust, the Michael Karfunkel Family 2005 Trust (the “Trust”), as borrower, and AmTrust and the Company, as lenders of $250,000 ($125,000 each lender). The amounts borrowed are secured by equity interests, cash and, other investments held by ACP Re Holdings, LLC in an amount equal to 115% of the outstanding loan balance. The maturity date of the loan is September 20, 2036. The interest rate on the outstanding principal balance is a fixed annual rate of 3.7%, provided that up to 1.2% thereof may be paid in kind. The Trust is required to cause ACP Re Holdings, LLC to maintain assets having a value greater than 115% of the outstanding loan balance, and if there is a shortfall, the Trust will make a contribution to ACP Re Holdings, LLC of assets having a market value of at least the shortfall (the “Maintenance Covenant”). Commencing on September 20, 2026, and for each year thereafter, two percent of the then outstanding principal balance of the loan (inclusive of any amounts previously paid in kind) is due and payable. A change of control of greater than 50% and an uncured breach of the Maintenance Covenant are included as events of default. As of September 30, 2020, and December 31, 2019, the Company had a receivable principal amount related to the ACP Re Credit Agreement of $130,784 and $129,229, respectively. The Company recorded interest income of $1,210 and $1,195 for the three months ended September 30, 2020, and 2019, respectively, and $3,615 and $3,571 for the nine months ended September 30, 2020, and 2019, respectively, under the ACP Re Credit Agreement. Management determined no impairment reserve was needed for the carrying value of the loan at September 30, 2020, and December 31, 2019, based on the collateral levels maintained. Other Related Party Transactions Lease Agreements The Company leases office space at 59 Maiden Lane in New York, New York from 59 Maiden Lane Associates LLC, an entity that is wholly-owned by the Karfunkel family. The lease term is through 2022. The Company paid $207 in rent for both the three months ended September 30, 2020, and 2019, respectively, and $622 in rent for both the nine months ended September 30, 2020, and 2019, respectively. The Company leases office space at 30 North LaSalle Street, Chicago, Illinois from 30 North LaSalle Street Partners LLC, an entity that is wholly-owned by the Karfunkel family. The lease term is through 2025. The Company paid $111 and $78 in rent for the three months ended September 30, 2020, and 2019, respectively, and $329 and $231 in rent for the nine months ended September 30, 2020, and 2019, respectively.