EMPLOYEE BENEFIT PLANS - Present Value of Plan Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Benefits
Employee benefit plans
Fair value of pension plan assets	$ 750,047	$ 716,273	$ 637,330
Other Benefits
Employee benefit plans
Fair value of pension plan assets	174,354	163,367	$ 144,686
Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	750,047	716,273
Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	174,354	163,367
Level 1 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	288	407
Level 1 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	39,349	38,686
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	749,759	715,866
Assets measured at net asset value (NAV) | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	135,005	124,681
Fixed Income | Level 1, 2, and 3 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	288	407
Fixed Income | Level 1, 2, and 3 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	21,769	21,891
Fixed Income | Level 1 | Fair Value, Recurring | Pension Benefits
Employee benefit plans
Fair value of pension plan assets	288	407
Fixed Income | Level 1 | Fair Value, Recurring | Other Benefits
Employee benefit plans
Fair value of pension plan assets	21,769	21,891
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	7,039	6,437
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	7,039	6,437
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	7,390	7,268
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	7,390	7,268
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	3,151	3,090
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	3,151	3,090
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