Summary of Significant Accounting Policies - Property, Plant and Equipment (Details)	12 Months Ended
	Dec. 31, 2019
Automobiles and trucks
Estimated useful lives
Estimated useful lives	5 years
Computers and office equipment
Estimated useful lives
Estimated useful lives	5 years
Office furniture and fixtures
Estimated useful lives
Estimated useful lives	7 years
Machinery and equipment | Minimum
Estimated useful lives
Estimated useful lives	5 years
Machinery and equipment | Maximum
Estimated useful lives
Estimated useful lives	30 years
Leasehold improvements
Estimated useful lives
Estimated useful lives	30 years
Buildings and improvements | Minimum
Estimated useful lives
Estimated useful lives	30 years
Buildings and improvements | Maximum
Estimated useful lives
Estimated useful lives	40 years