Condensed Consolidated Statements of Earnings - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenues:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,854,262	$ 1,545,132
Operating Expenses:
Airfreight services	513,504	443,404
Ocean freight and ocean services	379,418	366,063
Customs brokerage and other services	325,502	208,060
Salaries and related costs	339,895	292,580
Rent and occupancy costs	36,913	28,130
Depreciation and amortization	13,922	11,927
Selling and promotion	10,965	10,915
Other	41,325	37,939
Total operating expenses	1,661,444	1,399,018
Operating income	192,818	146,114
Other Income (Expense):
Interest income	4,314	2,741
Other, net	624	298
Other income (expense), net	4,938	3,039
Earnings before income taxes	197,756	149,153
Income tax expense	61,556	55,586
Net earnings	136,200	93,567
Less net earnings attributable to the noncontrolling interest	508	303
Net earnings attributable to shareholders	$ 135,692	$ 93,264
Diluted earnings attributable to shareholders per share	$ 0.76	$ 0.51
Basic earnings attributable to shareholders per share	$ 0.77	$ 0.52
Weighted average diluted shares outstanding	179,416	182,094
Weighted average basic shares outstanding	175,900	180,062
Airfreight services
Revenues:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 731,227	$ 615,545
Ocean freight and ocean services
Revenues:
Revenue from Contract with Customer, Excluding Assessed Tax	520,883	493,759
Customs brokerage and other services
Revenues:
Revenue from Contract with Customer, Excluding Assessed Tax	$ 602,152	$ 435,828