ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclass) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Earnings before income taxes	$ 84,843	$ 42,729	$ 164,793	$ 113,218
Reclassification out of Accumulated Other Comprehensive Income [Member] | Total Pension and Postretirment Adjustments, Net [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service costs			432
Amortization of actuarial losses			(14,717)
Settlements			(3,075)
Earnings before income taxes			(17,360)
Provision for income taxes			4,192
Net earnings			$ (13,168)