v2.4.1.9

Goodwill and Other Intangible Assets - Other Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Other Intangible Assets [Line Items]

2015

$ 50,053us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths

2016

49,578us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo

2017

49,094us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree

2018

45,387us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour

2019

41,831us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive

Gross Carrying Amount

601,357us-gaap_FiniteLivedIntangibleAssetsGross

294,415us-gaap_FiniteLivedIntangibleAssetsGross

^[1]

Accumulated Amortization

(119,691)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization

(94,915)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization

Net Carrying Amount

481,666us-gaap_FiniteLivedIntangibleAssetsNet

199,500us-gaap_FiniteLivedIntangibleAssetsNet

^[1]

Net Carrying Amount, Total

498,045us-gaap_IntangibleAssetsNetExcludingGoodwill

206,744us-gaap_IntangibleAssetsNetExcludingGoodwill

^[1],[2]

241,950us-gaap_IntangibleAssetsNetExcludingGoodwill

Acquired software and developed technology

Other Intangible Assets [Line Items]

Gross Carrying Amount

150,458us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= wex_AcquiredSoftwareandDevelopedTechnologyMember

83,844us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= wex_AcquiredSoftwareandDevelopedTechnologyMember

^[1]

Accumulated Amortization

(30,949)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= wex_AcquiredSoftwareandDevelopedTechnologyMember

(22,254)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= wex_AcquiredSoftwareandDevelopedTechnologyMember

Net Carrying Amount

119,509us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= wex_AcquiredSoftwareandDevelopedTechnologyMember

^[2]

61,590us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= wex_AcquiredSoftwareandDevelopedTechnologyMember

^[1],[2]

71,343us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= wex_AcquiredSoftwareandDevelopedTechnologyMember

^[1]

Non-compete agreements

Other Intangible Assets [Line Items]

Gross Carrying Amount

0us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember

100us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember

^[1]

Accumulated Amortization

0us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember

(100)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember

Customer relationships

Other Intangible Assets [Line Items]

Gross Carrying Amount

394,316us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember

197,424us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember

^[1]

Accumulated Amortization

(84,492)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember

(70,021)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember

Net Carrying Amount

309,824us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember

^[2]

127,403us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember

^[1],[2]

150,290us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_CustomerRelationshipsMember

^[1]

Licensing agreements

Other Intangible Assets [Line Items]

Gross Carrying Amount

36,100us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember

0us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember

^[1]

Accumulated Amortization

(385)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember

0us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember

Net Carrying Amount

35,715us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember

0us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_LicensingAgreementsMember

^[2]

Patent

Other Intangible Assets [Line Items]

Gross Carrying Amount

2,697us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember

2,935us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember

^[1]

Accumulated Amortization

(1,452)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember

(1,263)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember

Net Carrying Amount

1,245us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember

1,672us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember

^[1],[2]

2,365us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_PatentsMember

Trade name

Other Intangible Assets [Line Items]

Gross Carrying Amount

17,786us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember

10,112us-gaap_FiniteLivedIntangibleAssetsGross
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember

^[1]

Accumulated Amortization

(2,413)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember

(1,277)us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember

Net Carrying Amount

15,373us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember

^[2]

8,835us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember

^[1],[2]

7,407us-gaap_FiniteLivedIntangibleAssetsNet
/ wex_IntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember

^[1]

Trademarks, trade names and brand names

Other Intangible Assets [Line Items]

Net Carrying Amount, Indefinite-lived intangible assets

$ 16,379us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ wex_IntangibleAssetsByMajorClassAxis
= wex_TrademarksTradeNamesAndBrandNamesMember

$ 7,244us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ wex_IntangibleAssetsByMajorClassAxis
= wex_TrademarksTradeNamesAndBrandNamesMember

^[1],[2]

$ 10,545us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ wex_IntangibleAssetsByMajorClassAxis
= wex_TrademarksTradeNamesAndBrandNamesMember

[1]	The prior years amounts have been adjusted to reflect changes as a result of finalizing the purchase accounting.
[2]	The prior years amounts have been adjusted to reflect changes as a result of finalizing the purchase accounting

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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- Definition

Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

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-Publisher FASB

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