Business Segment Information - Financial Information Regarding Company's Operations by Geographic Area (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Segment Reporting Information [Line Items]
Revenues		$ 2,666,419	$ 2,206,678
Directly related cost of transportation and other expenses	[1]	1,776,675	1,433,280
Salaries and related costs		457,937	413,162
Other operating expenses	[2]	165,949	145,460
Operating income		265,858	214,776
Identifiable assets at period end		4,756,650	4,488,268	$ 4,754,458
Capital expenditures		13,152	10,181
Depreciation and amortization		14,604	15,161
Equity		2,287,503	2,197,665	$ 2,225,784
Operating Segments | United States Segment
Segment Reporting Information [Line Items]
Revenues		854,449	751,543
Directly related cost of transportation and other expenses	[1]	451,917	403,949
Salaries and related costs		258,089	233,313
Other operating expenses	[2]	22,548	22,395
Operating income		121,895	91,886
Identifiable assets at period end		2,588,265	2,424,540
Capital expenditures		8,407	5,528
Depreciation and amortization		8,938	9,020
Equity		1,481,145	1,531,497
Operating Segments | Other North America Segment
Segment Reporting Information [Line Items]
Revenues		116,485	106,850
Directly related cost of transportation and other expenses	[1]	73,193	66,710
Salaries and related costs		19,592	18,906
Other operating expenses	[2]	14,828	14,178
Operating income		8,872	7,056
Identifiable assets at period end		177,996	177,571
Capital expenditures		226	1,399
Depreciation and amortization		497	497
Equity		50,613	26,143
Operating Segments | Latin America Segment
Segment Reporting Information [Line Items]
Revenues		62,389	44,492
Directly related cost of transportation and other expenses	[1]	36,435	24,464
Salaries and related costs		10,438	8,847
Other operating expenses	[2]	9,914	7,917
Operating income		5,602	3,264
Identifiable assets at period end		107,290	105,151
Capital expenditures		225	153
Depreciation and amortization		251	289
Equity		46,120	55,173
Operating Segments | North Asia Segment
Segment Reporting Information [Line Items]
Revenues		695,008	544,941
Directly related cost of transportation and other expenses	[1]	554,494	426,474
Salaries and related costs		40,361	34,942
Other operating expenses	[2]	37,746	32,318
Operating income		62,407	51,207
Identifiable assets at period end		503,899	504,704
Capital expenditures		505	282
Depreciation and amortization		1,056	1,093
Equity		273,084	185,824
Operating Segments | South Asia Segment
Segment Reporting Information [Line Items]
Revenues		364,577	227,719
Directly related cost of transportation and other expenses	[1]	281,495	164,024
Salaries and related costs		28,072	22,917
Other operating expenses	[2]	23,285	17,995
Operating income		31,725	22,783
Identifiable assets at period end		348,424	265,621
Capital expenditures		874	144
Depreciation and amortization		570	548
Equity		145,611	118,194
Operating Segments | Europe Segment
Segment Reporting Information [Line Items]
Revenues		422,795	398,317
Directly related cost of transportation and other expenses	[1]	271,716	254,519
Salaries and related costs		81,549	77,572
Other operating expenses	[2]	43,359	39,516
Operating income		26,171	26,710
Identifiable assets at period end		772,342	755,569
Capital expenditures		1,156	2,218
Depreciation and amortization		2,646	2,970
Equity		169,589	162,346
Operating Segments | Middle East Africa and India Segment
Segment Reporting Information [Line Items]
Revenues		152,872	134,106
Directly related cost of transportation and other expenses	[1]	108,848	93,792
Salaries and related costs		19,836	16,665
Other operating expenses	[2]	15,028	11,799
Operating income		9,160	11,850
Identifiable assets at period end		277,677	284,325
Capital expenditures		1,759	457
Depreciation and amortization		646	744
Equity		164,036	160,237
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenues		(2,156)	(1,290)
Directly related cost of transportation and other expenses	[1]	(1,423)	(652)
Salaries and related costs		0	0
Other operating expenses	[2]	(759)	(658)
Operating income		26	20
Identifiable assets at period end		(19,243)	(29,213)
Equity		$ (42,695)	$ (41,749)

[1] Directly related cost of transportation and other expenses totals operating expenses from airfreight services, ocean freight and ocean services and customs brokerage and other services as shown in the condensed consolidated statements of earnings.

[2] Other operating expenses totals rent and occupancy, depreciation and amortization, selling and promotion and other as shown in the consolidated statements of earnings.