Condensed Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues:
Airfreight services	$ 735,164	$ 621,566	$ 2,022,577	$ 1,764,512
Ocean freight and ocean services	563,386	495,460	1,585,730	1,414,344
Customs brokerage and other services	503,616	445,368	1,411,270	1,277,174
Total revenues	1,802,166	1,562,394	5,019,577	4,456,030
Operating Expenses:
Airfreight services	547,595	444,359	1,490,417	1,236,555
Ocean freight and ocean services	411,061	359,991	1,163,051	1,006,710
Customs brokerage and other services	244,368	212,785	675,729	597,320
Salaries and related costs	319,050	291,204	930,159	868,091
Rent and occupancy costs	30,533	27,091	87,826	81,029
Depreciation and amortization	12,272	11,882	36,241	34,853
Selling and promotion	10,608	10,134	32,476	29,817
Other	39,784	37,685	102,429	103,702
Total operating expenses	1,615,271	1,395,131	4,518,328	3,958,077
Operating income	186,895	167,263	501,249	497,953
Other Income (Expense):
Interest income	3,444	2,924	9,565	8,593
Other, net	96	925	2,584	3,407
Other income (expense), net	3,540	3,849	12,149	12,000
Earnings before income taxes	190,435	171,112	513,398	509,953
Income tax expense	69,829	63,163	190,470	188,518
Net earnings	120,606	107,949	322,928	321,435
Less net earnings attributable to the noncontrolling interest	343	368	550	1,218
Net earnings attributable to shareholders	$ 120,263	$ 107,581	$ 322,378	$ 320,217
Diluted earnings attributable to shareholders per share	$ 0.66	$ 0.59	$ 1.77	$ 1.75
Basic earnings attributable to shareholders per share	0.67	0.59	1.79	1.76
Common Stock, Dividends, Per Share, Cash Paid	$ 0.00	$ 0.00	$ 0.42	$ 0.40
Weighted average diluted shares outstanding	181,788	182,692	181,951	182,958
Weighted average basic shares outstanding	179,416	181,177	179,827	181,645