Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2018

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):

	Thirteen Weeks Ended
	March 31, 2018		April 1, 2017
Average number of common shares outstanding		42,038		41,879
Incremental shares from assumed exercises of stock options		60		119
Average number of common shares and common share equivalents outstanding		42,098		41,998