Retirement Plan	12 Months Ended
Dec. 31, 2016
Retirement Plan	(6) Retirement Plan Landstar sponsors an Internal Revenue Code section 401(k) defined contribution plan for the benefit of 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 $2,074,000 in fiscal year 2016, $1,901,000 in fiscal year 2015 and $1,718,000 in fiscal year 2014.

Retirement Plan

12 Months Ended

Dec. 31, 2016

(6) Retirement Plan

Landstar sponsors an Internal Revenue Code section 401(k) defined contribution plan for the benefit of 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 $2,074,000 in fiscal year 2016, $1,901,000 in fiscal year 2015 and $1,718,000 in fiscal year 2014.