EMPLOYEE BENEFIT PLANS - Present Value of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Pension Benefits
Employee benefit plans
Fair value of pension plan assets	$ 844,970	$ 750,047	$ 716,273
Other Benefits
Employee benefit plans
Fair value of pension plan assets	199,347	174,354	$ 163,367
Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	844,970	750,047
Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	199,347	174,354
Level 1 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	93	288
Level 1 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	42,144	39,349
Level 2 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Level 2 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Level 3 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Level 3 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Assets measured at net asset value (NAV) | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	844,877	749,759
Assets measured at net asset value (NAV) | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	157,203	135,005
Fixed Income | Level 1, 2, and 3 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	93	288
Fixed Income | Level 1, 2, and 3 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	25,068	21,769
Fixed Income | Level 1 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	93	288
Fixed Income | Level 1 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	25,068	21,769
Fixed Income | Level 2 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Fixed Income | Level 2 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Fixed Income | Level 3 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Fixed Income | Level 3 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Domestic Equity | Level 1, 2, and 3 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Domestic Equity | Level 1, 2, and 3 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	2,585	7,039
Domestic Equity | Level 1 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Domestic Equity | Level 1 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	2,585	7,039
Domestic Equity | Level 2 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Domestic Equity | Level 2 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Domestic Equity | Level 3 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Domestic Equity | Level 3 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Non U.S. Equities | Level 1, 2, and 3 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Non U.S. Equities | Level 1, 2, and 3 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	10,309	7,390
Non U.S. Equities | Level 1 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Non U.S. Equities | Level 1 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	10,309	7,390
Non U.S. Equities | Level 2 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Non U.S. Equities | Level 2 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Non U.S. Equities | Level 3 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Non U.S. Equities | Level 3 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Emerging markets | Level 1, 2, and 3 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Emerging markets | Level 1, 2, and 3 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	4,182	3,151
Emerging markets | Level 1 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Emerging markets | Level 1 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	4,182	3,151
Emerging markets | Level 2 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Emerging markets | Level 2 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Emerging markets | Level 3 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	0	0
Emerging markets | Level 3 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	$ 0	$ 0