v3.26.1
Fair Value Measurements - Valuation of Financial Instruments That are Marked-to-Market on Recurring Basis (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Assets:    
Trading investments $ 55,938 $ 49,250
Available-for-sale investments 1,716,712 1,758,070
Derivative instruments $ 0 $ 0
Derivative Asset, Statement of Financial Position [Extensible Enumeration] Other Assets, Net Other Assets, Net
Liabilities:    
Derivative instruments $ (2) $ (8)
Fair Value Measurements on a Recurring Basis    
Assets:    
Trading investments 55,938 49,250
Available-for-sale investments 1,716,712 1,758,070
Derivative instruments 1 0
Total earning assets 1,772,651 1,807,320
Liabilities:    
Derivative instruments (3) (8)
Level 1  | Fair Value Measurements on a Recurring Basis    
Assets:    
Trading investments 0 0
Available-for-sale investments 0 0
Derivative instruments 0 0
Total earning assets 0 0
Liabilities:    
Derivative instruments 0 0
Level 2  | Fair Value Measurements on a Recurring Basis    
Assets:    
Trading investments 0 0
Available-for-sale investments 1,715,212 1,756,178
Derivative instruments 1 0
Total earning assets 1,715,213 1,756,178
Liabilities:    
Derivative instruments (3) (8)
Level 3  | Fair Value Measurements on a Recurring Basis    
Assets:    
Trading investments 55,938 49,250
Available-for-sale investments 1,500 1,892
Derivative instruments 0 0
Total earning assets 57,438 51,142
Liabilities:    
Derivative instruments $ 0 $ 0