Consolidated Statements of Income (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013
Revenue	$ 819,320	$ 675,535	$ 2,321,960	$ 1,972,805
Investment income	332	366	1,027	1,111
Costs and expenses:
Purchased transportation	633,596	518,141	1,792,560	1,512,677
Commissions to agents	64,631	53,630	181,196	156,377
Other operating costs, net of gains on asset dispositions	6,521	6,011	19,350	15,396
Insurance and claims	12,026	13,335	37,732	36,907
Selling, general and administrative	36,215	30,990	108,567	94,967
Depreciation and amortization	7,086	7,180	20,419	20,743
Total costs and expenses	760,075	629,287	2,159,824	1,837,067
Operating income	59,577	46,614	163,163	136,849
Interest and debt expense	774	856	2,260	2,367
Income from continuing operations before income taxes	58,803	45,758	160,903	134,482
Income taxes	22,048	17,255	60,585	50,736
Income from continuing operations	36,755	28,503	100,318	83,746
Income from discontinued operations, net of income taxes		743		2,706
Net income	$ 36,755	$ 29,246	$ 100,318	$ 86,452
Earnings per common share:
Income from continuing operations	$ 0.82	$ 0.62	$ 2.23	$ 1.81
Income from discontinued operations		$ 0.02		$ 0.06
Earnings per common share	$ 0.82	$ 0.64	$ 2.23	$ 1.87
Diluted earnings per share:
Income from continuing operations	$ 0.82	$ 0.62	$ 2.22	$ 1.81
Income from discontinued operations		$ 0.02		$ 0.06
Diluted earnings per share	$ 0.82	$ 0.64	$ 2.22	$ 1.87
Average number of shares outstanding:
Earnings per common share	44,713,000	45,708,000	45,018,000	46,156,000
Diluted earnings per share	44,937,000	45,856,000	45,222,000	46,323,000
Dividends per common share	$ 0.07		$ 0.19