Annual report pursuant to Section 13 and 15(d)

SIGNIFICANT ACCOUNTING POLICIES - Property, Plant, and Equipment (Details)

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SIGNIFICANT ACCOUNTING POLICIES - Property, Plant, and Equipment (Details)
 12 Months Ended
Dec. 31, 2017
Buildings | Minimum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 30 years
Buildings | Maximum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 40 years
Building Improvements | Minimum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 10 years
Building Improvements | Maximum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 30 years
Land Improvements | Minimum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 5 years
Land Improvements | Maximum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 20 years
Equipment | Minimum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 3 years
Equipment | Maximum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 10 years
Furniture and Fixtures | Minimum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 5 years
Furniture and Fixtures | Maximum  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 20 years