SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2017
Building | Minimum
Depreciation
Estimated useful lives	15 years
Building | Maximum
Depreciation
Estimated useful lives	40 years
Machinery and Equipment | Minimum
Depreciation
Estimated useful lives	5 years
Machinery and Equipment | Maximum
Depreciation
Estimated useful lives	10 years
Office Equipment | Minimum
Depreciation
Estimated useful lives	3 years
Office Equipment | Maximum
Depreciation
Estimated useful lives	10 years
Vehicles
Depreciation
Estimated useful lives	3 years