v3.26.1
Fair Value of Ether - Changes in Quantity of ETH and Respective Fair Value (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
USD ($)
Ethereum
Jun. 30, 2025
USD ($)
Ethereum
Jun. 30, 2026
USD ($)
Ethereum
Jun. 30, 2025
USD ($)
Ethereum
Fair Value Disclosures [Abstract]        
Beginning balance, Ether | Ethereum     910,328.89953386 1,417,788.29257515
Ether contributed, Ether | Ethereum     100,638.09303104 58,394.50354538
Ether Redeemed, Ether | Ethereum     (222,953.87073101) (333,499.26471943)
Ether distributed for Sponsor's Fee, related party, Ether | Ethereum     (10,427.77480814) (15,229.93845663)
Ether distributed for Sponsor's Staking Fee, related party, Ether | Ethereum     (2,501.1930692)  
Staking Reward Income, Ether | Ethereum     8,376.79826132  
Ether distributed to Shareholders, Ether | Ethereum     (8,462.44094203)  
Net change in unrealized appreciation on investment in Ether, Ether | Ethereum     0 0
Net change in unrealized appreciation/depreciation on Sponsor's Staking Fee payable in Ether | Ethereum     0  
Net realized gain on investment in Ether sold to pay Sponsor's Fee | Ethereum     0 0
Net realized gain on investment in Ether sold for redemption of shares, Ether | Ethereum     0 0
Net realized gain on investment in Ether sold to pay Sponsor's Staking Fee, Ether | Ethereum     0  
Net realized gain on investment in Ether sold for return of capital, Ether | Ethereum     0  
Investment Owned ,Balance | Ethereum 774,998.51127584 1,127,453.59294447 774,998.51127584 1,127,453.59294447
Beginning balance, Fair Value     $ 2,705,443 $ 4,735,980
Ether contributed, Fair Value     261,371 145,024
Ether redeemed, Fair Value $ (179,607) $ (205,781) (541,860) (811,599)
Ether distributed for Sponsor's Fee, related party, Fair Value     (23,348) (37,446)
Ether distributed for Sponsor's Staking Fee, related party, Fair value     (6,192)  
Staking Reward Income, Fair Value     18,808  
Ether distributed to Shareholders, Fair value     (21,150)  
Net change in unrealized appreciation/depreciation on investment in Ether (486,789) 604,451 (1,489,085) (1,883,136)
Net change in unrealized appreciation/depreciation on Sponsor's Staking Fee payable in Ether, Fair Value     (181)  
Net realized gain on investment in Ether sold to pay expenses       30,214
Net realized gain on investment in Ether sold to pay Sponsor's Fee 4,481 12,074 11,441 30,214
Net realized gain on investment in Ether sold for return of capital     11,935  
Net realized gain on investment in Ether sold to pay Sponsor's Staking Fee, Fair Value     3,594  
Net realized gain on investment in Ether sold for redemption of shares     292,582 657,896
Investment Owned, at Fair Value $ 1,223,358 $ 2,836,933 $ 1,223,358 $ 2,836,933