Trade Receivables, net (Tables)

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Schedule of Trade Receivables, net

Trade receivables balances were as follows:

	December 31,
	2020		2019
	(In thousands)
Trade customers	$	570,611	$	511,487
Equipment manufacturers	5,680		5,146
Other	24,281		20,092
Trade receivables	600,572		536,725
Less: Allowance for doubtful accounts	(22,093)		(18,178)
Trade receivables, net	$	578,479	$	518,547

The following is a rollforward of the allowance for doubtful accounts for trade receivables:

	2020		2019		2018
	(In thousands)
Beginning balance	$	18,178	$	16,355	$	14,829
Provision (reduction)	17,267		16,925		(3,092)
Write-offs directly against the reserve	(902)		(2,652)		(1,362)
Write-offs for revenue adjustments	(12,450)		(12,450)		5,861
Other 1	—		—		119
Ending balance	$	22,093	$	18,178	$	16,355

1    Represents allowance for doubtful trade accounts receivables assumed in 2018 from the Abilene Acquisition. See Note 5 for further details regarding this transaction.

Notes receivable are included in "Other current assets" and "Other long-term assets" in the consolidated balance sheets and were comprised of:

	December 31,
	2020		2019
	(In thousands)
Notes receivable from independent contractors	$	7,291	$	9,167
Notes receivable from third parties	3,034		6,164
Gross notes receivable	10,325		15,331
Allowance for doubtful notes receivable	(602)		(503)
Total notes receivable, net of allowance	$	9,723	$	14,828
Current portion, net of allowance	2,846		4,163
Long-term portion	$	6,877	$	10,665

The following is a rollforward of the allowance for doubtful notes receivable:

	2020		2019		2018
	(In thousands)
Beginning balance	$	503	$	1,051	$	1,040
Provision (reduction)	464		(137)		(100)
Write-offs	(365)		(411)		(103)
Other 1	—		—		214
Ending balance	$	602	$	503	$	1,051

1    Represents allowance for doubtful notes receivable assumed in 2018 from the Abilene Acquisition. See Note 5 for further details regarding this transaction.