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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Reclass) (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]    
Earnings before income taxes $ 70,251 $ 60,977
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 235  
Amortization of actuarial losses (2,546)  
Earnings before income taxes (2,311)  
Income tax (567)  
Net earnings $ 1,744