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Business Segment Information - People's Republic of China Including Hong Kong Percentage Share of the Company's Total Revenue, Net Revenue, Total Identifiable Assets or Equity (Detail)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Total revenues | People's Republic of China, including Hong Kong      
Concentration Risk [Line Items]      
Concentration percentage 33.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember		 33.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember		 34.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueServicesNetMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember
Net revenues | People's Republic of China, including Hong Kong      
Concentration Risk [Line Items]      
Concentration percentage 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= expd_NetRevenuesTotalMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember		 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= expd_NetRevenuesTotalMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember		 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= expd_NetRevenuesTotalMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember
Identifiable assets at year end | People's Republic of China, including Hong Kong      
Concentration Risk [Line Items]      
Concentration percentage 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AssetsTotalMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember		 14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AssetsTotalMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember		 17.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AssetsTotalMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember
Equity | People's Republic of China, including Hong Kong      
Concentration Risk [Line Items]      
Concentration percentage 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_StockholdersEquityTotalMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember		 11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_StockholdersEquityTotalMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember		 16.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_StockholdersEquityTotalMember
/ us-gaap_StatementGeographicalAxis
= expd_PeoplesRepublicOfChinaIncludingHongKongMember
Lower end | Geographic Concentration Risk      
Concentration Risk [Line Items]      
Concentration percentage 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_GeographicConcentrationRiskMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_GeographicConcentrationRiskMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_GeographicConcentrationRiskMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember