Significant Accounting Policies - Property And Equipment at Cost Depreciation and Amortization Estimated Useful Lives (Details)	12 Months Ended
	Dec. 31, 2016
Land improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	8 years
Land improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	12 years
Buildings and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	8 years
Buildings and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	30 years
Machinery, equipment and other | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Machinery, equipment and other | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	12 years
Office and transportation equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life	3 years
Office and transportation equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life	10 years