Annual report [Section 13 and 15(d), not S-K Item 405]

Fair Value Measurements - Schedule of Recurring and Nonrecurring Fair Value Measurements (Details)

v3.25.4
Fair Value Measurements - Schedule of Recurring and Nonrecurring Fair Value Measurements (Details) - USD ($)
$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Assets:    
Derivative financial instruments, Assets $ 525 $ 3,313
Transferable tax credits 7,500
Defined benefit plan assets(1)    
Defined benefit plan assets 30,126 23,480
Liabilities:    
Derivative financial instruments, Liabilities 1,067 1,177
Level 1 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets 525 3,313
Level 2 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets 22,101 20,167
Level 3 [Member]    
Assets:    
Transferable tax credits 7,500  
Defined benefit plan assets(1)    
Defined benefit plan assets 7,500
Derivative Financial Instruments, Liabilities [Member]    
Liabilities:    
Derivative financial instruments, Liabilities 1,067 1,177
Derivative Financial Instruments, Liabilities [Member] | Level 1 [Member]    
Liabilities:    
Derivative financial instruments, Liabilities 1,067 1,177
Derivative Financial Instruments, Liabilities [Member] | Level 2 [Member]    
Liabilities:    
Derivative financial instruments, Liabilities
Derivative Financial Instruments, Liabilities [Member] | Level 3 [Member]    
Liabilities:    
Derivative financial instruments, Liabilities
Large U.S. Equity [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[2] $ 8,060 $ 6,962
Benefit plan percentage allocation [1],[2] 36.00% 34.00%
Large U.S. Equity [Member] | Level 1 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[2]
Large U.S. Equity [Member] | Level 2 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[2] 8,060 6,962
Large U.S. Equity [Member] | Level 3 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[2]
Small/Mid U.S. Equity [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[3] $ 3,574 $ 3,636
Benefit plan percentage allocation [1],[3] 16.00% 18.00%
Small/Mid U.S. Equity [Member] | Level 1 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[3]
Small/Mid U.S. Equity [Member] | Level 2 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[3] 3,574 3,636
Small/Mid U.S. Equity [Member] | Level 3 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[3]
International Equity [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[4] $ 3,479 $ 2,762
Benefit plan percentage allocation [1],[4] 16.00% 14.00%
International Equity [Member] | Level 1 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[4]
International Equity [Member] | Level 2 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[4] 3,479 2,762
International Equity [Member] | Level 3 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[4]
Fixed Income [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[5] $ 6,988 $ 6,807
Benefit plan percentage allocation [1],[5] 32.00% 34.00%
Fixed Income [Member] | Level 1 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[5]
Fixed Income [Member] | Level 2 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[5] 6,988 6,807
Fixed Income [Member] | Level 3 [Member]    
Defined benefit plan assets(1)    
Defined benefit plan assets [1],[5]
Derivative Financial Instruments, Assets [Member]    
Assets:    
Derivative financial instruments, Assets 525 3,313
Derivative Financial Instruments, Assets [Member] | Level 1 [Member]    
Assets:    
Derivative financial instruments, Assets 525 3,313
Derivative Financial Instruments, Assets [Member] | Level 2 [Member]    
Assets:    
Derivative financial instruments, Assets
Derivative Financial Instruments, Assets [Member] | Level 3 [Member]    
Assets:    
Derivative financial instruments, Assets
Long-lived assets – Magic Valley [Member]    
Assets:    
Derivative financial instruments, Assets   19,397
Long-lived assets – Magic Valley [Member] | Level 1 [Member]    
Assets:    
Derivative financial instruments, Assets  
Long-lived assets – Magic Valley [Member] | Level 2 [Member]    
Assets:    
Derivative financial instruments, Assets  
Long-lived assets – Magic Valley [Member] | Level 3 [Member]    
Assets:    
Derivative financial instruments, Assets   $ 19,397
[1] See Note 11 for accounting discussion.
[2] This category includes investments in funds comprised of equity securities of large U.S. companies. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.
[3] This category includes investments in funds comprised of equity securities of small- and medium-sized U.S. companies. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.
[4] This category includes investments in funds comprised of equity securities of foreign companies, including emerging markets. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.
[5] This category includes investments in funds comprised of U.S. and foreign investment-grade fixed income securities, high-yield fixed income securities that are rated below investment-grade, U.S. treasury securities, mortgage-backed securities, and other asset-backed securities. The funds are valued using the net asset value method in which an average of the market prices for the underlying investments is used to value the fund.