Annual report pursuant to Section 13 and 15(d)

BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of estimated useful lives (Details)

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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Summary of estimated useful lives (Details)
12 Months Ended
Dec. 31, 2015
Land improvements  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 15 years
Minimum | Buildings and improvements  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 10 years
Minimum | Furniture, fixtures and equipment  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 2 years
Maximum | Buildings and improvements  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 39 years
Maximum | Furniture, fixtures and equipment  
Property, Plant and Equipment [Line Items]  
Property, plant and equipment useful life 10 years