v2.4.1.9

Business Acquisitions and Other Intangible Assets Acquisitions - Summary of UNIK Acquisition (Details) (USD $)
In Thousands, unless otherwise specified

0 Months Ended

Aug. 30, 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

Unik Financial Services

Business Acquisition [Line Items]

Total UNIK value

44,701wex_BusinessAcquisitionPurchasePriceAllocationIncludingPortionAttributableToNoncontrollingInterest
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

Less: Redeemable non-controlling interest

21,904wex_BusinessAcquisitionPurchasePriceAllocationRedeemableNoncontrollingInterest
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

Consideration paid (net of cash acquired)

22,797us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedNet
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

Cash

1,566us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCashAndEquivalents
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

Accounts receivable

11,726us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsReceivables
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

Accounts payable

(12,640)us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesAccountsPayable
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

Other tangible liabilities, net

(36,866)wex_BusinessAcquisitionPurchasePriceAllocationOtherAssetsLiabilitiesNet
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

Acquired software and developed technology

14,193wex_BusinessAcquisitionPurchasePriceAllocationSoftware
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

^[2]

Customer relationships

15,171wex_BusinessAcquisitionPurchasePriceAllocationCustomerRelationships
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

^[3]

Trademarks and trade name

1,272wex_BusinessAcquisitionPurchasePriceAllocationIntangibleAssetsTradeNamesAndTrademarks
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

^[4]

Goodwill

28,375us-gaap_Goodwill
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

Estimated earn out associated with acquisition

$ 991wex_EarnoutConsiderationAssociatedWithAcquisition
/ us-gaap_BusinessAcquisitionAxis
= wex_UnikSAMember

Unik Financial Services | Acquired software and developed technology

Business Acquisition [Line Items]

Weighted average life

6 years 2 months 12 days

Unik Financial Services | Customer relationships

Business Acquisition [Line Items]

Weighted average life

5 years 10 months 24 days

Unik Financial Services | 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 – 6.2 years.
[3]	Weighted average life – 5.9 years.
[4]	Weighted average life – 5.5 years.

X

- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275

+ Details

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Balance Type:	na
Period Type:	duration

X

- Details

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X

- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472

+ Details

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X

- Definition

Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

X

- Definition

Business Acquisition, Purchase Price Allocation, Customer Relationships

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Business Acquisition Purchase Price Allocation, Including Portion Attributable to Noncontrolling Interest

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Business Acquisition, Purchase Price Allocation, Intangible Assets, Trade Names And Trademarks

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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X

- Definition

Business Acquisition, Purchase Price Allocation, Other Assets (Liabilities) Net

+ References

No definition available.

+ Details

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Namespace Prefix:	wex_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Business Acquisition, Purchase Price Allocation, Redeemable Noncontrolling Interest

+ References

No definition available.

+ Details

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Namespace Prefix:	wex_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Business Acquisition, Purchase Price Allocation, Software

+ References

No definition available.

+ Details

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Namespace Prefix:	wex_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The cash outflow associated with the acquisition of assets of a business not deemed a business combination.

+ References

No definition available.

+ Details

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Namespace Prefix:	wex_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- Details

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Namespace Prefix:
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Period Type: