RETIREMENT BENEFITS - Fair Value of Plan Assets by Asset Category (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 769,630	$ 807,016
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	669,645	708,088
Equity securities—US
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51,603	48,237
Equity securities—International
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	24,127	24,512
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 24,255	$ 26,179