Consolidated Statements of Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Revenue	$ 1,047,926	$ 780,908
Investment income	861	414
Costs and expenses:
Purchased transportation	810,297	595,523
Commissions to agents	82,125	63,798
Other operating costs, net of gains on asset sales/dispositions	7,604	6,897
Insurance and claims	17,360	14,513
Selling, general and administrative	45,251	38,323
Depreciation and amortization	10,997	9,934
Total costs and expenses	973,634	728,988
Operating income	75,153	52,334
Interest and debt expense	800	1,083
Income before income taxes	74,353	51,251
Income taxes	16,880	18,868
Net income	57,473	32,383
Less: Net loss attributable to noncontrolling interest	(44)
Net income attributable to Landstar System, Inc. and subsidiary	$ 57,517	$ 32,383
Earnings per common share attributable to Landstar System, Inc. and subsidiary	$ 1.37	$ 0.77
Diluted earnings per share attributable to Landstar System, Inc. and subsidiary	$ 1.37	$ 0.77
Average number of shares outstanding:
Earnings per common share	42,038,000	41,879,000
Diluted earnings per share	42,098,000	41,998,000
Dividends per common share	$ 0.15	$ 0.09