Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Useful Lives of Property, Plant and Equipment (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Useful Lives of Property, Plant and Equipment (Details)
 12 Months Ended
Dec. 31, 2017
Buildings and improvements | Lower Range  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 10 years
Buildings and improvements | Upper Range  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 30 years
Capital leases - equipment | Lower Range  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 3 years
Capital leases - equipment | Upper Range  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 7 years
Furniture, fixtures, and equipment | Lower Range  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 3 years
Furniture, fixtures, and equipment | Upper Range  
Property, Plant and Equipment [Line Items]  
Estimated useful lives 7 years