v3.25.2
Investments - Debt and Short-term Investments (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Investments          
Other investments $ 57,266   $ 57,266   $ 57,939
Investment in unconsolidated investees 61,183   61,183   56,477
Prime Holdings Insurance Services, Inc. (Prime)          
Investments          
Investment in unconsolidated investees 61,000   61,000    
Other Unconsolidated Investees | Maximum          
Investments          
Investment in unconsolidated investees 1,000   1,000    
FHLBC          
Investments          
Investments pledged as collateral $ 55,000   $ 55,000    
Investment in federal home loan bank stock us-gaap:AssetPledgedAsCollateralMember   us-gaap:AssetPledgedAsCollateralMember    
Federal home loan bank borrowings fair value disclosure $ 50,000   $ 50,000    
Investment In Low Income Housing Tax Credit Partnerships (LIHTC)          
Investments          
Other investments 11,000   11,000   7,000
Amortization on tax credit partnership investments $ 1,000 $ 1,000 $ 1,000 $ 1,000  
Amortization of tax credit partnerships, Statement of Income Income tax expense Income tax expense Income tax expense Income tax expense  
Total tax benefit on investments in tax credit partnership $ 1,000 $ 1,000 $ 1,000 $ 1,000  
Qualified affordable housing project investments, unfunded commitment 5,000   5,000    
Historic tax credit partnerships (HTC)          
Investments          
Other investments 13,000   13,000   15,000
Amortization on tax credit partnership investments $ 1,000 $ 1,000 $ 2,000 $ 2,000  
Amortization of tax credit partnerships, Statement of Income Income tax expense Income tax expense Income tax expense Income tax expense  
Total tax benefit on investments in tax credit partnership $ 1,000 $ 1,000 $ 2,000 $ 3,000  
Equity investments in tax credit structures, unfunded commitment 4,000   4,000    
Investment in Private Funds          
Investments          
Other investments 18,000   18,000   $ 24,000
Fair value investments entities that calculate net asset value per share, unfunded commitments $ 3,000   $ 3,000