BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2016

BENEFIT PLANS [Abstract]

Net Periodic Benefit Cost

The net periodic benefit cost for the three and six months ended June 30, 2016 and 2015 is as follows:

	Pension Benefits												Post-retirement Benefits
	Three Months Ended						Six Months Ended						Three Months Ended						Six Months Ended
	June 30,						June 30,						June 30,						June 30,
(000's omitted)	2016			2015			2016			2015			2016			2015			2016			2015
Service cost	$	1,027		$	831		$	2,052		$	1,662		$	0		$	0		$	0		$	0
Interest cost		1,406			1,375			2,812			2,749			20			22			41			43
Expected return on plan assets		(2,961	)		(3,042	)		(5,921	)		(6,085	)		0			0			0			0
Amortization of unrecognized net loss		377			366			754			733			(1	)		(3	)		(3	)		(6	)
Amortization of prior service cost		11			2			22			4			(45	)		(45	)		(89	)		(89	)
Net periodic benefit cost	$	(140	)	$	(468	)	$	(281	)	$	(937	)	$	(26	)	$	(26	)	$	(51	)	$	(52	)