Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2018

Summary of Risk Retention Amounts Per Occurrence

Risk retention amounts per occurrence during the three years ended December 31, 2017, were as follows:

Workers’ compensation	$	1,000,000
Bodily injury and property damage		2,000,000
Employee medical and hospitalization		400,000
Cargo loss and damage		250,000

Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers

Effect of Adoption of Standard on Previously Reported Financial Data

The below tables reflect the effect of the adoption of this standard on the previously reported financial data.

Condensed Consolidated Balance Sheet impact:

	As of December 31, 2017
		As adjusted		As originally reported		Effect of change
	(in thousands)
Accounts receivable		$	170,278	$	170,610	$	(332	)
Total current assets			203,249		203,581		(332	)
Total assets			967,315		967,647		(332	)
Accounts payable			57,438		57,717		(279	)
Total current liabilities			166,926		167,205		(279	)
Retained earnings			339,500		339,553		(53	)
Total stockholders’ equity			582,494		582,547		(53	)
Total liabilities and stockholders’ equity			967,315		967,647		(332	)

Condensed Consolidated Statement of Operations impact:

	For the quarter ended June 30, 2017								For the six months ended June 30, 2017
		As adjusted		As originally reported		Effect of change				As adjusted		As originally reported		Effect of change
	(in thousands, except per share data)
Operating revenue		$	364,404	$	358,160	$	6,244			$	687,494	$	675,197	$	12,297
Purchased transportation			28,639		22,363		6,276				49,459		37,138		12,321
Total operating expenses			334,718		328,442		6,276				640,281		627,960		12,321
Operating income			29,686		29,718		(32	)			47,213		47,237		(24	)
Net income			17,571		17,603		(32	)			28,966		28,990		(24	)
Basic Earnings Per Share			0.69		0.69		—				1.14		1.14		—
Diluted Earnings Per Share			0.68		0.68		—				1.12		1.12		—

Condensed Consolidated Statement of Cash Flows impact:

	For the six months ended June 30, 2017
		As adjusted			As originally reported			Effect of change
	(in thousands)
Net income		$	28,966		$	28,990		$	(24	)
Changes in operating assets and liabilities, net			(6,298	)		(6,322	)		24
Net cash provided by operating activities			79,317			79,317			—
Net decrease in cash and cash equivalents			(1,140	)		(1,140	)		—