PENSION AND OTHER POSTRETIREMENT BENEFITS (Schedule of Unrecognized Benefit Amounts) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 28, 2020	Jun. 30, 2019
Pension Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Net actuarial loss (gain), beginning of period	$ 58,239	$ 54,343
Amortization	(751)	(656)
Curtailment and settlement adjustments	0	(1,930)
Actuarial loss	28,806	13,734
Asset loss (gain)	16,438	(9,806)
Other	(202)	0
Net actuarial loss, end of period	102,530	55,685
Other Benefits
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Net actuarial loss (gain), beginning of period	91	(34)
Amortization	0	0
Curtailment and settlement adjustments	0	0
Actuarial loss	64	96
Asset loss (gain)	0	0
Other	0	0
Net actuarial loss, end of period	$ 155	$ 62