v3.26.1
Statement of Changes in Net Assets - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Operations      
Net investment income $ 244,501 $ 246,808 $ 248,542
Net realized investment gains 225,826 229,291 185,694
Change in net unrealized investment gains (703,918) 1,438,368 (1,094,907)
Net increase (decrease) in net assets resulting from operations (233,591) 1,914,467 (660,671)
Distributions to holders of Trust Interests      
From net investment income (244,501) (246,808) (248,542)
From net realized investment gains (225,826) (229,291) (185,694)
Decrease in net assets resulting from distributions (470,327) (476,099) (434,236)
Trust Interests transactions      
Cost of Trust Interests issued 612 797 1,045
Cost of Trust Interests redeemed (43,057) (47,610) (48,264)
Cost of Trust Interests withdrawn (13,561) (15,749) (16,414)
Cost of Trust Interests escheated (15,937) (13,021) (12,813)
Net decrease in net assets resulting from Trust Interests transactions (71,943) (75,583) (76,446)
Total increase (decrease) in net assets (775,861) 1,362,785 (1,171,353)
Net assets      
Beginning of year 9,136,810 7,774,025 8,945,378
End of year $ 8,360,949 $ 9,136,810 $ 7,774,025
Trust Interests rollforward:      
Balance at January 1, 111,587,813 117,556,699 123,606,156
Trust Interests issued 7,705 10,859 17,194
Trust Interests redeemed (3,370,923) (3,727,301) (3,778,528)
Trust Interests withdrawn (1,061,667) (1,233,073) (1,284,993)
Trust Interests escheated (1,247,693) (1,019,371) (1,003,130)
Balance at December 31, 105,915,235 111,587,813 117,556,699