Earnings Per Share (Tables)

9 Months Ended

Sep. 28, 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):

	Thirty Nine Weeks Ended				Thirteen Weeks Ended
	September 28, 2019		September 29, 2018		September 28, 2019		September 29, 2018
Average number of common shares outstanding		39,891		41,530		39,566		41,101
Incremental shares from assumed exercises of stock options		—		46		—		36
Average number of common shares and common share equivalents outstanding		39,891		41,576		39,566		41,137