Condensed Consolidated Statements of Operations and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues:
Total revenues	$ 6,015,376	$ 6,263,695	$ 19,629,804	$ 16,600,290
Costs and expenses:
Personnel expenses	437,545	399,880	1,295,670	1,123,616
Other selling, general, and administrative expenses	162,040	133,543	426,585	377,430
Total costs and expenses	5,727,767	5,952,926	18,527,056	15,805,588
Income from operations	287,609	310,769	1,102,748	794,702
Interest and other income/expense, net	(15,972)	(16,662)	(57,541)	(41,419)
Income before provision for income taxes	271,637	294,107	1,045,207	753,283
Provision for income taxes	45,839	47,054	200,876	139,136
Net income	225,798	247,053	844,331	614,147
Other comprehensive loss	(49,790)	(12,034)	(76,516)	(19,482)
Comprehensive income	$ 176,008	$ 235,019	$ 767,815	$ 594,665
Basic net income per share (in dollars per share)	$ 1.81	$ 1.87	$ 6.60	$ 4.61
Diluted net income per share (in dollars per share)	$ 1.78	$ 1.85	$ 6.50	$ 4.56
Basic weighted average shares outstanding (shares)	124,980	131,845	127,944	133,201
Dilutive effect of outstanding stock awards (shares)	2,210	1,591	1,895	1,460
Diluted weighted average shares outstanding (shares)	127,190	133,436	129,839	134,661
Transportation
Revenues:
Total revenues	$ 5,724,364	$ 5,999,901	$ 18,718,357	$ 15,800,576
Costs and expenses:
Purchased products and services	4,862,541	5,180,390	15,979,639	13,580,980
Sourcing
Revenues:
Total revenues	291,012	263,794	911,447	799,714
Costs and expenses:
Purchased products and services	$ 265,641	$ 239,113	$ 825,162	$ 723,562