CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Sep. 24, 2011	Sep. 29, 2012	Sep. 24, 2011
Revenue	$ 717,168	$ 684,013	$ 2,102,164	$ 1,931,560
Investment income	393	373	1,185	1,294
Costs and expenses:
Purchased transportation	548,162	518,300	1,603,865	1,459,660
Commissions to agents	56,036	54,990	162,728	153,165
Other operating costs	6,447	6,427	17,635	22,050
Insurance and claims	8,010	9,381	28,411	34,096
Selling, general and administrative	37,455	39,206	113,916	112,252
Depreciation and amortization	7,072	6,549	20,476	19,336
Total costs and expenses	663,182	634,853	1,947,031	1,800,559
Operating income	54,379	49,533	156,318	132,295
Interest and debt expense	818	735	2,312	2,340
Income before income taxes	53,561	48,798	154,006	129,955
Income taxes	20,460	18,640	58,203	49,642
Net income	33,101	30,158	95,803	80,313
Less: Net loss attributable to noncontrolling interest				(62)
Net income attributable to Landstar System, Inc. and subsidiary	$ 33,101	$ 30,158	$ 95,803	$ 80,375
Earnings per common share attributable to Landstar System, Inc. and subsidiary	$ 0.71	$ 0.64	$ 2.05	$ 1.69
Diluted earnings per share attributable to Landstar System, Inc. and subsidiary	$ 0.71	$ 0.64	$ 2.04	$ 1.68
Average number of shares outstanding:
Earnings per common share	46,614,000	47,358,000	46,775,000	47,670,000
Diluted earnings per share	46,732,000	47,387,000	46,964,000	47,735,000
Dividends paid per common share	$ 0.060	$ 0.055	$ 0.170	$ 0.155