NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2020

Schedule of Changes in the allowance for doubtful accounts

Changes in the allowance for doubtful accounts is as follows (in millions):

	Year Ended December 31,
	2020		2019
Beginning balance	$	3.5	$	1.2
Provision, charged to expense		1.2		3.7
Write-off, less recoveries		(1.7)		(1.4)
Ending balance	$	3.0	$	3.5

Schedule of estimated salvage value using the straight-line method over the estimated useful lives

Buildings and building improvements	10 – 40 years
Leasehold improvements	5 – 20 years (1)
Revenue equipment – tractors, trailers and accessories	5 – 15 years
Assets leased and available for lease to owner-operators	1 – 5 years
Vehicles	5 – 7 years
Furniture and fixtures	5 – 7 years
Office, computer equipment and capitalized software development	3 – 5 years

⁽¹⁾ or the term of the lease, whichever is shorter

Intangible assets - finite lived

Customer relationships	10 – 15 years
Non-competition agreements	2 – 5 years

Contingent Consideration

Summary of changes in the fair value of the liabilities

The Company valued contingent consideration for acquisition related earn-outs (see Note 3 for details) using Level 3 inputs. The table below is a summary of the changes in the fair value of the earn-out liability for the years ended December 31, 2020 and 2019 (in millions):

	2020		2019
Balance, beginning of year	$	21.5	$	21.9
Change in fair value		(0.2)		(0.4)
Arbitrated decrease in contingent consideration		(13.7)		—
Payment of contingent consideration		(7.6)		—
Balance, end of year	$	—	$	21.5