v2.4.1.9
Business Acquisitions and Other Intangible Assets Acquisitions - Summary of FleetOne Acquisition (Details) (USD $)
In Thousands, unless otherwise specified
 0 Months Ended
Oct. 04, 2012
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Business Acquisition [Line Items]        
Goodwill   $ 1,116,365us-gaap_Goodwill [1] $ 819,892us-gaap_Goodwill [1] $ 847,986us-gaap_Goodwill
FleetOne        
Business Acquisition [Line Items]        
Consideration paid (net of cash acquired) 376,258us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= wex_FleetOneMember		      
Accounts receivable 152,527us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= wex_FleetOneMember		      
Accounts payable (151,647)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
/ us-gaap_BusinessAcquisitionAxis
= wex_FleetOneMember		      
Other tangible liabilities, net (693)wex_BusinessAcquisitionPurchasePriceAllocationOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= wex_FleetOneMember		      
Acquired software and developed technology 35,000wex_BusinessAcquisitionPurchasePriceAllocationSoftware
/ us-gaap_BusinessAcquisitionAxis
= wex_FleetOneMember		 [2]      
Customer relationships 74,000wex_BusinessAcquisitionPurchasePriceAllocationCustomerRelationships
/ us-gaap_BusinessAcquisitionAxis
= wex_FleetOneMember		 [3]      
Trademarks and trade name 4,000wex_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsTradeNamesAndTrademarks
/ us-gaap_BusinessAcquisitionAxis
= wex_FleetOneMember		 [3]      
Goodwill 263,071us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= wex_FleetOneMember		      
FleetOne | Acquired software and developed technology        
Business Acquisition [Line Items]        
Weighted average life 6 years 8 months 12 days      
FleetOne | Customer relationships        
Business Acquisition [Line Items]        
Weighted average life 5 years 6 months      
FleetOne | Trade name        
Business Acquisition [Line Items]        
Weighted average life 5 years 6 months      
[1] The prior year amounts have been adjusted to reflect changes as a result of finalizing the purchase accounting.
[2] Weighted average life – 6.7 years.
[3] Weighted average life – 5.5 years.