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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclass) (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Earnings before income taxes $ 91,341 $ 80,935 $ 256,134 $ 194,153
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     648  
Amortization of actuarial losses     (21,705)  
Settlements     (3,310)  
Earnings before income taxes     (24,367)  
Provision for income taxes     5,889  
Net earnings     $ (18,478)