STOCK-BASED COMPENSATION (1) (Detail) - Performance Restricted Stock Units And Long Term Incentive Plan Units [Member]	12 Months Ended
Dec. 31, 2018 $ / shares
March 17, 2016 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price on date of grant	$ 34.78
Dividend yield	6.56%
Risk free interest rate at time of grant, minimum	0.50%
Risk free interest rate at time of grant, maximum	1.14%
Expected volatility, minimum	23.92%
Expected volatility, maximum	24.88%
January 1, 2017 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price on date of grant	$ 31.26
Dividend yield	7.81%
Risk free interest rate at time of grant, minimum	0.66%
Risk free interest rate at time of grant, maximum	1.58%
Expected volatility, minimum	22.82%
Expected volatility, maximum	25.26%
January 1, 2018 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Closing price on date of grant	$ 27.54
Dividend yield	9.44%
Risk free interest rate at time of grant, minimum	1.60%
Risk free interest rate at time of grant, maximum	2.05%
Expected volatility, minimum	21.03%
Expected volatility, maximum	23.24%

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (f)(2)(iii)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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- Definition

The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Price of a single share of a number of saleable stocks of a company.

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