Consolidated Statements Of Income (USD $) In Thousands, except Share data	3 Months Ended		6 Months Ended
	Jun. 25, 2011	Jun. 26, 2010	Jun. 25, 2011	Jun. 26, 2010
Consolidated Statements Of Income
Revenue	$ 675,561	$ 641,721	$ 1,247,547	$ 1,189,809
Investment income	393	289	921	574
Costs and expenses:
Purchased transportation	509,982	490,089	941,360	907,290
Commissions to agents	54,004	46,971	98,175	87,379
Other operating costs	7,679	7,968	15,623	15,504
Insurance and claims	13,449	13,831	24,715	26,129
Selling, general and administrative	35,782	36,973	73,046	73,816
Depreciation and amortization	6,388	6,196	12,787	11,988
Total costs and expenses	627,284	602,028	1,165,706	1,122,106
Operating income	48,670	39,982	82,762	68,277
Interest and debt expense	777	810	1,605	1,664
Income before income taxes	47,893	39,172	81,157	66,613
Income taxes	18,295	14,962	31,002	25,446
Net income	29,598	24,210	50,155	41,167
Less: Net loss attributable to noncontrolling interest		(227)	(62)	(446)
Net income attributable to Landstar System, Inc. and subsidiary	$ 29,598	$ 24,437	$ 50,217	$ 41,613
Earnings per common share attributable to Landstar System, Inc. and subsidiary	$ 0.62	$ 0.49	$ 1.05	$ 0.83
Diluted earnings per share attributable to Landstar System, Inc. and subsidiary	$ 0.62	$ 0.49	$ 1.05	$ 0.83
Average number of shares outstanding:
Earnings per common share	47,782,000	50,123,000	47,826,000	50,165,000
Diluted earnings per share	47,912,000	50,215,000	47,907,000	50,259,000
Dividends paid per common share	$ 0.050	$ 0.045	$ 0.100	$ 0.090