BENEFIT PLANS (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pension Plans [Abstract]
Contribution made to defined benefit pension plan by employer		$ 2,900
Pension Benefits [Member]
Pension Plans [Abstract]
Contribution made to defined benefit pension plan by employer		100
Net periodic benefit cost [Abstract]
Service cost	$ 1,240	1,480
Interest cost	1,334	1,259
Expected return on plan assets	(4,756)	(4,696)
Amortization of unrecognized net loss	211	900
Amortization of prior service cost	154	95
Net periodic (benefit)	(1,817)	(962)
Post-retirement Benefits [Member]
Net periodic benefit cost [Abstract]
Service cost	0	0
Interest cost	11	11
Expected return on plan assets	0	0
Amortization of unrecognized net loss	9	11
Amortization of prior service cost	(45)	(45)
Net periodic (benefit)	$ (25)	(23)
Steuben Trust Company Pension Plan
Pension Plans [Abstract]
Contribution made to defined benefit pension plan by employer		$ 90