BENEFIT PLANS (Tables)

3 Months Ended

Mar. 31, 2020

BENEFIT PLANS [Abstract]

Net Periodic Benefit Cost

The net periodic benefit cost for the three months ended March 31, 2020 and 2019 is as follows:

	Pension Benefits						Post-retirement Benefits
	Three Months Ended March 31,						Three Months Ended March 31,
(000's omitted)	2020			2019			2020			2019
Service cost	$	1,438		$	1,270		$	0		$	0
Interest cost		1,356			1,566			14			18
Expected return on plan assets		(3,932	)		(3,577	)		0			0
Amortization of unrecognized net loss		810			642			10			9
Amortization of prior service cost		60			16			(45	)		(45	)
Net periodic benefit	$	(268	)	$	(83	)	$	(21	)	$	(18	)