Earnings Per Share (Tables)

3 Months Ended

Mar. 30, 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):

	Thirteen Weeks Ended
	March 30, 2019		March 31, 2018
Average number of common shares outstanding		40,161		42,038
Incremental shares from assumed exercises of stock options		5		60
Average number of common shares and common share equivalents outstanding		40,166		42,098