SEGMENT INFORMATION (Reconciliation) (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting [Abstract]
Total operating income	$ 105,685	$ 102,076	$ 177,730	$ 166,574
Interest expense	(7,960)	(9,566)	(15,232)	(17,770)
Other income, net	5,871	3,971	11,349	8,654
Earnings before income taxes	$ 103,596	$ 96,481	$ 173,847	$ 157,458

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

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- Definition

Amount of the cost of borrowed funds accounted for as interest expense.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

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Amount of income (expense) related to nonoperating activities, classified as other.

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