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STOCKHOLDERS' EQUITY - Dividend Reinvestment Plan (Details) - shares	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Dividend Reinvestment Plan
Common shares issued under Dividend Reinvestment Plan	77,000	220,000	243,000
Maximum
Dividend Reinvestment Plan
Market price discount (as a percent)	5.00%	5.00%	5.00%

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- References

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- Definition

Represents the percentage of discount from market price on common stock purchased through the dividend reinvestment plan.

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- Definition

Number of shares issued during the period from a dividend reinvestment plan (DRIP). A dividend reinvestment plan allows the shareholders to reinvest dividends paid to them by the entity on new issues of stock by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

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