v3.26.1
Fair Value Of Financial Instruments (Schedule of Changes in Fair Value Associated with Level 3 Financial Instruments) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Asset-Backed Securities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning Balance $ 500 $ 4,040
Unrealized gains/(losses)   534
Realized losses   (2)
Sales   3,004
Net change   3,540
Ending Balance 500 500
Corporate Equity Securities Financial Instruments Owned [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning Balance   114
Unrealized gains/(losses) (6) (6)
Realized losses   (10)
Sales   104
Transfers into Level 3 98 98
Net change (104) 10
Ending Balance 104 104
Syndicated Loans [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning Balance 75,655 56,898
Unrealized gains/(losses) 4 24
Realized losses (3) (3)
Purchases 13,469 41,574
Sales 1,369 1,369
Redemptions (19,845) (29,173)
Net change 7,752 (11,005)
Ending Balance 67,903 67,903
Corporate Equity Securities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning Balance 19,411 19,446
Unrealized gains/(losses) 930 965
Purchases 655 655
Net change 275 310
Ending Balance 19,136 19,136
Auction Rate Securities [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning Balance 554 551
Unrealized gains/(losses) (5) (8)
Realized losses (7) (7)
Sales 368 368
Net change 370 367
Ending Balance 184 184
Other Investment [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Beginning Balance 14,366 13,560
Unrealized gains/(losses) 539 1,345
Net change 539 1,345
Ending Balance $ 14,905 $ 14,905