Earnings Per Share (Tables)

6 Months Ended

Jun. 29, 2019

Earnings Per Share [Abstract]

Reconciliation of Average Number of Common Shares Outstanding to Average Number of Diluted Shares Outstanding

The following table provides a reconciliation of the average number of common shares outstanding used to calculate earnings per common share attributable to Landstar System, Inc. and subsidiary to the average number of common shares and common share equivalents outstanding used to calculate diluted earnings per share attributable to Landstar System, Inc. and subsidiary (in thousands):

	Twenty Six Weeks Ended				Thirteen Weeks Ended
	June 29, 2019		June 30, 2018		June 29, 2019		June 30, 2018
Average number of common shares outstanding		40,053		41,744		39,945		41,450
Incremental shares from assumed exercises of stock options		—		51		—		41
Average number of common shares and common share equivalents outstanding		40,053		41,795		39,945		41,491