Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2017

Significant Accounting Policies [Abstract]

Depreciation of Assets Based on Usage

Asset	Rate / term
Land improvements	10%
Buildings	15 - 30 years
Yard equipment	20 - 30%
Automotive equipment	30%
Computer software and equipment	3 - 5 years
Office equipment	20%
Leasehold improvements	Lease term

Amortization of Intangible Assets

Asset	Rate / term
Trade names and trademarks	3 - 15 years or indefinite-lived
Customer relationships	6 - 20 years
Software assets	3 - 7 years

Schedule of Prospective Adoption of New Accounting Pronouncements

	As reported					New revenue standard
Year ended December 31,	2017		2016		Year ended December 31,	2017		2016
					Revenue from inventory sales	$	346,774	$	571,134
					Service revenues		624,417		555,843
Revenues	$	610,517	$	566,395	Total revenues		971,191		1,126,977
					Cost of inventory sold		(306,498)		(513,348)
Costs of services, excluding
depreciation and amortization ("D&A")		(79,013)		(66,062)	Costs of services, excluding D&A		(133,189)		(113,296)
	$	531,504	$	500,333	Gross profit	$	531,504	$	500,333