Note 2 - Adoption of New Accounting Standard (Tables)

9 Months Ended

Sep. 30, 2018

Notes Tables

Cumulative Effect of Adjustments for New Accounting Pronouncements on Balance Sheet [Table Text Block]

(In thousands)	Balance at December 31, 2017		Adjustments Due to ASC 606			Balance at January 1, 2018
Assets:
Prepaid expenses and other	$	19,810	$	2,445	(a)	$	22,255
Liabilities:
Accounts payable and accrued liabilities		38,100		1,960			40,060
Stockholders’ equity:
Retained earnings		448,542		485			449,027

Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]

	Three Months Ended September 30, 2018
(In thousands)	Prior to Adoption of ASC 606		Adjustments Due to ASC 606		As Reported
Operating revenue	$	199,100	$	549	$	199,649
Operating expenses:
Salaries, wages and benefits		63,935		116		64,051
Purchased transportation		35,568		299		35,867
Fuel and fuel taxes		31,627		31		31,658
Supplies and maintenance		10,551		23		10,574
Income taxes expense		3,835		21		3,856
Net income		15,198		59		15,257

	Nine Months Ended September 30, 2018
(In thousands)	Prior to Adoption of ASC 606		Adjustments Due to ASC 606			As Reported
Operating revenue	$	583,268	$	365		$	583,633
Operating expenses:
Salaries, wages and benefits		185,955		168			186,123
Purchased transportation		105,497		444			105,941
Fuel and fuel taxes		92,410		34			92,444
Supplies and maintenance		31,262		(1	)		31,261
Income taxes expense		12,046		(79	)		11,967
Net income		39,491		(201	)		39,290

	Balance at September 30, 2018
(In thousands)	Prior to Adoption of ASC 606		Adjustments Due to ASC 606			As Reported
Assets:
Prepaid expenses and other	$	16,006	$	2,810	(a)	$	18,816
Liabilities:
Accounts payable and accrued liabilities		45,733		2,526			48,259
Stockholders’ equity:
Retained earnings		483,935		284			484,219