Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Revenue	$ 1,202,081	$ 943,430	$ 3,432,793	$ 2,594,772
Investment income	1,002	711	2,754	1,733
Costs and expenses:
Purchased transportation	931,473	726,827	2,658,710	1,989,938
Commissions to agents	99,304	76,598	275,828	210,678
Other operating costs, net of gains on asset sales/dispositions	8,966	8,097	24,176	22,497
Insurance and claims	18,819	17,927	57,718	46,333
Selling, general and administrative	46,699	43,995	140,948	123,179
Depreciation and amortization	10,754	10,130	32,520	29,961
Total costs and expenses	1,116,015	883,574	3,189,900	2,422,586
Operating income	87,068	60,567	245,647	173,919
Interest and debt expense	816	657	2,455	2,559
Income before income taxes	86,252	59,910	243,192	171,360
Income taxes	19,304	17,490	56,279	59,047
Net income	66,948	42,420	186,913	112,313
Less: Net loss attributable to noncontrolling interest	(37)	(23)	(112)	(23)
Net income attributable to Landstar System, Inc. and subsidiary	$ 66,985	$ 42,443	$ 187,025	$ 112,336
Earnings per common share attributable to Landstar System, Inc. and subsidiary	$ 1.63	$ 1.01	$ 4.50	$ 2.68
Diluted earnings per share attributable to Landstar System, Inc. and subsidiary	$ 1.63	$ 1.01	$ 4.50	$ 2.67
Average number of shares outstanding:
Earnings per common share	41,101,000	41,957,000	41,530,000	41,924,000
Diluted earnings per share	41,137,000	42,028,000	41,576,000	42,013,000
Dividends per common share	$ 0.165	$ 0.100	$ 0.465	$ 0.280