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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Basic and diluted earnings per share and per ADS (Details)	12 Months Ended
	Dec. 31, 2017 multiplier
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Multiplier used to compute income per ADS	100

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- References

No definition available.

+ Details

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- Definition

The multiplier used to compute income per ADS. Each ADS represents 100 shares of common stock.

+ References

No definition available.

+ Details

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