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FAIR VALUE MEASUREMENT (Details) - Interest rate swap - USD ($)	Dec. 31, 2019	Dec. 31, 2016
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Notional amount	$ 47,439,000
Derivative liabilities	$ 2,170,000
Designated as hedging instruments | Cash flow hedge
Fair value measurements of the entity's assets or liabilities that are measured at fair value on a recurring basis
Total notional		$ 399,000,000,000

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- Definition

Nominal or face amount used to calculate payments on the derivative liability.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
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-Section 50
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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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Fair value of financial and nonfinancial obligations.

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