PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Detail) - Pension Plans Defined Benefit [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 6,096	$ 7,344	$ 17,747	$ 20,345
Interest cost	7,045	6,574	21,788	19,629
Expected return on plan assets	(14,645)	(14,598)	(44,411)	(44,009)
Amortization of prior service cost	170	(105)	29	(230)
Amortization of unrecognized actuarial loss	1,557	4,843	6,741	12,652
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Total	$ 223	$ 4,058	$ 1,894	8,387
Defined Benefit Plan, Plan Assets, Contributions by Employer				$ 50,000