BENEFIT PLANS (Tables)

6 Months Ended

Jun. 30, 2018

Pension Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Benefit Cost

PENSION BENEFITS	Three Months Ended		Six Months Ended
	June 30		June 30
in thousands	2018	2017	2018	2017
Components of Net Periodic Benefit Cost
Service cost	$        1,429	$        1,654	$        2,858	$        3,308
Interest cost	8,875	9,058	17,751	18,115
Expected return on plan assets	(14,797)	(12,096)	(29,594)	(24,192)
Amortization of prior service cost	335	335	670	670
Amortization of actuarial loss	2,456	1,823	4,913	3,647
Net periodic pension benefit cost (credit)	$       (1,702)	$           774	$       (3,402)	$        1,548
Pretax reclassifications from AOCI included in
net periodic pension benefit cost	$        2,791	$        2,158	$        5,583	$        4,317

Postretirement Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Benefit Cost

OTHER POSTRETIREMENT BENEFITS	Three Months Ended		Six Months Ended
	June 30		June 30
in thousands	2018	2017	2018	2017
Components of Net Periodic Benefit Cost
Service cost	$           340	$           291	$           679	$           583
Interest cost	310	315	620	630
Amortization of prior service credit	(990)	(1,059)	(1,981)	(2,118)
Amortization of actuarial gain	(325)	(396)	(649)	(793)
Net periodic postretirement benefit credit	$          (665)	$          (849)	$       (1,331)	$       (1,698)
Pretax reclassifications from AOCI included in
net periodic postretirement benefit credit	$       (1,315)	$       (1,455)	$       (2,630)	$       (2,911)