BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Pension Plans
Contribution made to defined benefit pension plan by employer	$ 4,300
Pension Benefits
Pension Plans
Contribution made to defined benefit pension plan by employer			$ 100
Net periodic benefit cost [Abstract]
Service cost	1,108	$ 1,240		$ 2,216	$ 2,480
Interest cost	1,890	1,334		3,780	2,668
Expected return on plan assets	(4,020)	(4,756)		(8,040)	(9,512)
Amortization of unrecognized net (gain) loss	(555)	211		(1,110)	422
Amortization of prior service cost	205	154		410	308
Net periodic benefit	$ (1,372)	$ (1,817)		$ (2,744)	$ (3,634)