Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Net income attributable to Landstar System, Inc. and subsidiary	$ 24,254	$ 61,100	$ 65,149	$ 124,417
Other comprehensive (loss) income:
Unrealized holding gains on available-for-sale investments, net of tax expense of $338, $494, $770 and $222	2,816	810	1,237	1,805
Foreign currency translation (losses) gains	1,732	571	(6,170)	1,125
Other comprehensive (loss) income	4,548	1,381	(4,933)	2,930
Comprehensive income attributable to Landstar System, Inc. and subsidiary	$ 28,802	$ 62,481	$ 60,216	$ 127,347