Consolidated Statements Of Income (USD $) In Thousands, except Share data	3 Months Ended		9 Months Ended
	Sep. 24, 2011	Sep. 25, 2010	Sep. 24, 2011	Sep. 25, 2010
Consolidated Statements Of Income
Revenue	$ 684,013	$ 622,826	$ 1,931,560	$ 1,812,635
Investment income	373	495	1,294	1,069
Costs and expenses:
Purchased transportation	518,300	474,665	1,459,660	1,381,955
Commissions to agents	54,990	47,316	153,165	134,695
Other operating costs	6,427	6,448	22,050	21,952
Insurance and claims	9,381	11,480	34,096	37,609
Selling, general and administrative	39,206	41,070	112,252	114,886
Depreciation and amortization	6,549	6,456	19,336	18,444
Total costs and expenses	634,853	587,435	1,800,559	1,709,541
Operating income	49,533	35,886	132,295	104,163
Interest and debt expense	735	1,035	2,340	2,699
Income before income taxes	48,798	34,851	129,955	101,464
Income taxes	18,640	13,315	49,642	38,761
Net income	30,158	21,536	80,313	62,703
Less: Net loss attributable to noncontrolling interest		(266)	(62)	(712)
Net income attributable to Landstar System, Inc. and subsidiary	$ 30,158	$ 21,802	$ 80,375	$ 63,415
Earnings per common share attributable to Landstar System, Inc. and subsidiary	$ 0.64	$ 0.44	$ 1.69	$ 1.27
Diluted earnings per share attributable to Landstar System, Inc. and subsidiary	$ 0.64	$ 0.44	$ 1.68	$ 1.27
Average number of shares outstanding:
Earnings per common share	47,358,000	49,434,000	47,670,000	49,921,000
Diluted earnings per share	47,387,000	49,447,000	47,735,000	49,990,000
Dividends paid per common share	$ 0.055	$ 0.050	$ 0.155	$ 0.140