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Business Acquisitions and Other Intangible Assets Acquisitions - Summary of Evolution1 Acquisition (Details) (USD $) In Thousands, unless otherwise specified
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12 Months Ended |
0 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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Jul. 16, 2014
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| Business Acquisition [Line Items] |
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| Consideration paid (net of cash acquired) |
$ 891,725us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |
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$ 11,277us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |
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$ 402,475us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired |
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| Recorded goodwill |
1,116,365us-gaap_Goodwill |
[1] |
819,892us-gaap_Goodwill |
[1] |
847,986us-gaap_Goodwill |
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| Evolution1 |
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| Business Acquisition [Line Items] |
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| Consideration paid (net of cash acquired) |
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532,174us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired / us-gaap_BusinessAcquisitionAxis = wex_EvolutionOneMember |
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| Accounts receivable |
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8,418us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables / us-gaap_BusinessAcquisitionAxis = wex_EvolutionOneMember |
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| Accounts payable |
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(175)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable / us-gaap_BusinessAcquisitionAxis = wex_EvolutionOneMember |
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| Deferred tax liabilities, net |
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(68,516)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDeferredTaxLiabilitiesNoncurrent / us-gaap_BusinessAcquisitionAxis = wex_EvolutionOneMember |
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| Other tangible assets and liabilities, net |
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(3,585)wex_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOtherTangibleAssetsLiabilities / us-gaap_BusinessAcquisitionAxis = wex_EvolutionOneMember |
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| Recorded goodwill |
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296,132us-gaap_Goodwill / us-gaap_BusinessAcquisitionAxis = wex_EvolutionOneMember |
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| Evolution1 | Acquired software and developed technology |
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| Business Acquisition [Line Items] |
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| Finite-lived intangible assets |
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70,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = wex_EvolutionOneMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = wex_AcquiredSoftwareandDevelopedTechnologyMember |
[2] |
| Weighted average life |
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6 years 4 months 24 days |
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| Evolution1 | Customer relationships |
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| Business Acquisition [Line Items] |
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| Finite-lived intangible assets |
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211,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = wex_EvolutionOneMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_CustomerRelationshipsMember |
[3] |
| Weighted average life |
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9 years 8 months 12 days |
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| Evolution1 | Trademarks and trade names |
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| Business Acquisition [Line Items] |
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| Finite-lived intangible assets |
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7,900us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = wex_EvolutionOneMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember |
[4] |
| Indefinite-lived intangible assets |
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$ 11,000us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIndefiniteLivedIntangibleAssets / us-gaap_BusinessAcquisitionAxis = wex_EvolutionOneMember / us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis = us-gaap_TrademarksAndTradeNamesMember |
[5] |
| Weighted average life |
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9 years 10 months 24 days |
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