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Change in Accounting Estimate for Self-Insured Claims

Landstar provides for the estimated costs of self-insured claims primarily on an actuarial basis. The amount recorded for the estimated liability for claims incurred is based upon the facts and circumstances known on the applicable balance sheet date. The ultimate resolution of these claims may be for an amount greater or less than the amount estimated by management. The Company continually revises its existing claim estimates as new or revised information becomes available on the status of each claim. Historically, the Company has experienced both favorable and unfavorable development of prior years’ claims estimates.

The following table summarizes the effect of the increase in the cost of insurance claims resulting from (favorable) unfavorable development of prior year self-insured claims estimates on operating income, net income and earnings per share amounts in the consolidated statements of income for the thirteen-week periods ended April 1, 2017 and March 26, 2016 (in thousands, except per share amounts):


	Thirteen Weeks Ended
	April 1, 2017			March 26, 2016
Operating income	$	(104	)	$	2,078
Net income		(64	)		1,284
Earnings per share		—		$	0.03
Diluted earnings per share		—		$	0.03