Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Allowance for Credit Losses on Financing Receivables

The following table provides a summary of the activity in the allowance for doubtful accounts for the years ended 2018, 2017, and 2016 (in thousands):

	Year Ended December 31,
	2018		2017		2016
Balance at beginning of year	$	639	$	608	$	608
Provision for doubtful accounts	480		311		515
Uncollectible accounts written off, net of recovery	(544)		(280)		(515)
Balance at end of year	$	575	$	639	$	608

Disaggregation of Revenue

The following tables set forth revenue disaggregated by revenue type (in thousands):

	Year Ended December 31,
Revenue type:	2018
	Trucking		USAT Logistics		Total
Freight	$	295,585	$	165,398	$	460,983
Fuel surcharge	47,770		16,035		63,805
Accessorial	4,374		4,898		9,272
Total operating revenue	$	347,729	$	186,331	$	534,060