Summary of Significant Accounting Policies (Schedule of Estimated Useful Lives of Intangible Assets) (Details)	12 Months Ended
	Dec. 31, 2019
Customer relationships | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible asset, useful life	5 years
Customer relationships | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible asset, useful life	30 years
Contract arrangements | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible asset, useful life	8 years
Contract arrangements | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible asset, useful life	57 years
Non-compete agreements | Minimum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible asset, useful life	3 years
Non-compete agreements | Maximum
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible asset, useful life	10 years
Trade names
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible asset, useful life	20 years
Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible asset, useful life	5 years