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Retirement Plan | 12 Months Ended
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Dec. 30, 2017
Retirement Plan | (7) Retirement Plan Landstar sponsors an Internal Revenue Code section 401(k) defined contribution plan for the benefit of U.S. domiciled full-time employees who have completed one year of service. Eligible employees make voluntary contributions up to 75% of their base salary, subject to certain limitations. Landstar contributes an amount equal to 100% of the first 3% and 50% of the next 2% of such contributions, subject to certain limitations. The expense for the Company-sponsored defined contribution plan included in selling, general and administrative expense was $2,056,000 in fiscal year 2017, $2,074,000 in fiscal year 2016 and $1,901,000 in fiscal year 2015.

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
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