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OTHER INFORMATION (Detail)	3 Months Ended			9 Months Ended
	Sep. 30, 2018 USD ($) investment	Jun. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)
Other Income and Expenses [Abstract]
Decrease in other comprehensive income (loss), pensions impact	$ 300,000			$ 300,000
Change in deferred income tax liabilities			$ 0		$ 0
Gain on sale of cost method investment		$ 9,900,000
Number of investments sold | investment	1
Proceeds from sale of investment	$ 11,100,000

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Tax effect of plan amendments that occurred that has not been recognized in net periodic benefit cost.

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Amount of cash inflow from the sale of investments classified as other.

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