WEX (WEX) 10-Q 31 Jul 15 2015 Q2 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Jul. 24, 2015
Document And Entity Information [Abstract]
Entity Registrant Name	WEX INC.
Trading Symbol	WEX
Entity Central Index Key	1,309,108
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2,015
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Common Stock, Shares Outstanding		38,652,393

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents	$ 184,332	$ 284,763
Accounts receivable (less reserve for credit losses of $9,665 in 2015 and $13,919 in 2014)	1,972,141	1,865,538
Securitized accounts receivable, restricted	104,259	0
Income taxes receivable	0	6,859
Available-for-sale securities	18,672	18,940
Fuel price derivatives, at fair value	16,668	40,969
Property, equipment and capitalized software (net of accumulated depreciation of $176,950 in 2015 and $169,382 in 2014)	114,729	105,596
Deferred income taxes, net	11,415	5,764
Goodwill	1,089,271	1,117,149
Other intangible assets, net	461,727	497,297
Other assets	206,559	175,506
Total assets	4,179,773	4,118,381
Liabilities and Stockholders’ Equity
Accounts payable	596,526	425,956
Accrued expenses	125,865	137,227
Income taxes payable	3,032	0
Deposits	905,193	979,553
Securitized debt	89,176	0
Borrowed federal funds	50,500	0
Revolving line-of-credit facilities and term loan	720,970	901,564
Deferred income taxes, net	58,766	44,004
Notes outstanding	400,000	400,000
Other debt	51,446	52,975
Amounts due under tax receivable agreement	64,516	69,637
Other liabilities	10,837	13,154
Total liabilities	$ 3,076,827	$ 3,024,070
Commitments and contingencies (Note 14)
Redeemable non-controlling interest	$ 14,992	$ 16,590
Stockholders’ Equity
Common stock $0.01 par value; 175,000 shares authorized; 43,077 shares issued in 2015 and 43,021 in 2014; 38,745 shares outstanding in 2015 and 38,897 in 2014	431	430
Additional paid-in capital	183,655	179,077
Non-controlling interest	13,165	17,396
Retained earnings	1,130,567	1,081,730
Accumulated other comprehensive income	(67,522)	(50,581)
Less treasury stock at cost; 4,428 shares in 2015 and 4,218 shares in 2014	(172,342)	(150,331)
Total stockholders’ equity	1,087,954	1,077,721
Total liabilities and stockholders’ equity	$ 4,179,773	$ 4,118,381

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Accounts receivable, reserve for credit losses	$ 9,665	$ 13,919
Property, equipment and capitalized software, accumulated depreciation	$ 176,950	$ 169,382
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	175,000,000	175,000,000
Common stock, shares issued	43,077,000	43,021,000
Common stock, shares outstanding	38,745,000	38,897,000
Treasury stock, shares	4,428,000	4,218,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues
Fleet payment solutions	$ 135,520	$ 145,828	$ 264,010	$ 281,263
Other payment solutions	78,133	55,753	151,928	102,386
Total revenues	213,653	201,581	415,938	383,649
Expenses
Salary and other personnel	59,091	43,426	117,508	87,328
Restructuring	0	0	8,559	0
Service fees	33,941	27,831	64,011	54,136
Provision for credit losses	3,983	6,803	7,897	15,893
Technology leasing and support	10,021	7,151	19,455	14,178
Occupancy and equipment	5,034	3,761	10,031	8,127
Depreciation, amortization and impairment	20,759	15,176	42,146	30,194
Operating interest expense	1,357	1,599	2,936	2,887
Cost of hardware and equipment sold	684	2,255	1,793	3,203
Other	15,865	13,250	31,659	25,837
Gain on divestiture	0	0	(1,215)	0
Total operating expenses	150,735	121,252	304,780	241,783
Operating income	62,918	80,329	111,158	141,866
Financing interest expense	(11,916)	(7,276)	(24,004)	(14,632)
Net foreign currency (loss) gain	(2,161)	1,238	(6,537)	2,271
Net realized and unrealized loss on fuel price derivative instruments	(6,000)	(7,561)	(3,251)	(5,716)
Income before income taxes	42,841	66,730	77,366	123,789
Income taxes	16,441	23,881	30,933	44,860
Net income	26,400	42,849	46,433	78,929
Less: Net loss attributable to non-controlling interests	(92)	(484)	(2,404)	(946)
Net earnings attributable to WEX Inc.	$ 26,492	$ 43,333	$ 48,837	$ 79,875
Net earnings attributable to WEX Inc. per share:
Basic (in dollars per share)	$ 0.68	$ 1.12	$ 1.26	$ 2.05
Diluted (in dollars per share)	$ 0.68	$ 1.11	$ 1.26	$ 2.05
Weighted average common shares outstanding:
Basic (in shares)	38,739	38,856	38,798	38,911
Diluted (in shares)	38,799	38,946	38,880	39,031

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 26,400	$ 42,849	$ 46,433	$ 78,929
Changes in available-for-sale securities, net of tax effect of $(82) and $88 for the three months ended June 30, 2015 and 2014 and $(29) and $131 for the six months ended June 30, 2015 and 2014	(140)	152	(49)	226
Foreign currency translation	8,749	7,883	(20,317)	22,662
Comprehensive income	35,009	50,884	26,067	101,817
Less: comprehensive income (loss)attributable to non-controlling interests	866	(8)	(5,829)	310
Comprehensive income attributable to WEX Inc.	$ 34,143	$ 50,892	$ 31,896	$ 101,507

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Changes in available-for-sale securities, tax effect	$ (82)	$ 88	$ (29)	$ 131

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Retained Earnings [Member]	Non-controlling interest in subsidiaries [Member]
Beginning Balance (in shares) at Dec. 31, 2013		38,987
Beginning Balance at Dec. 31, 2013	$ 903,297	$ 429	$ 168,891	$ (15,495)	$ (130,566)	$ 879,519	$ 519
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued upon exercise of stock options (in shares)		12
Stock issued upon exercise of stock options	158	$ 0	158
Tax benefit (expense) from stock option and restricted stock units	1,232		1,232
Stock issued upon vesting of restricted and deferred stock units (in shares)		76
Stock issued upon vesting of restricted and deferred stock units	0	$ 1	(1)
Stock-based compensation, net of share repurchases for tax withholdings	2,165		2,165
Purchase of shares of treasury stock (in shares)		(211)
Purchase of shares of treasury stock	(19,765)				(19,765)
Changes in available-for-sale securities, net of tax effect of $131 in 2014 and $29 in 2015	226			226
Foreign currency translation	21,410			21,406			4
Non-controlling interest investment	1,033						1,033
Net income (loss)	79,178					79,875	(697)
Ending Balance (in shares) at Jun. 30, 2014		38,864
Ending Balance at Jun. 30, 2014	988,934	$ 430	172,445	6,137	(150,331)	959,394	859
Beginning Balance (in shares) at Dec. 31, 2014		38,897
Beginning Balance at Dec. 31, 2014	1,077,721	$ 430	179,077	(50,581)	(150,331)	1,081,730	17,396
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued upon exercise of stock options (in shares)		2
Stock issued upon exercise of stock options	24	$ 0	24
Tax benefit (expense) from stock option and restricted stock units	(234)		(234)
Stock issued upon vesting of restricted and deferred stock units (in shares)		56
Stock issued upon vesting of restricted and deferred stock units	0	$ 1	(1)
Stock-based compensation, net of share repurchases for tax withholdings	4,789		4,789
Purchase of shares of treasury stock (in shares)		(210)
Purchase of shares of treasury stock	(22,011)				(22,011)
Changes in available-for-sale securities, net of tax effect of $131 in 2014 and $29 in 2015	(49)			(49)
Foreign currency translation	(18,060)						(1,168)
Non-controlling interest investment	0						0
Net income (loss)	45,774					48,837	(3,063)
Ending Balance (in shares) at Jun. 30, 2015		38,745
Ending Balance at Jun. 30, 2015	$ 1,087,954	$ 431	$ 183,655	$ (67,522)	$ (172,342)	$ 1,130,567	$ 13,165

CONDENSED CONSOLIDATED STATEME8

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Statement of Stockholders' Equity [Abstract]
Changes in available-for-sale securities, tax effect	$ (29)	$ 131

CONDENSED CONSOLIDATED STATEME9

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities
Net income	$ 46,433	$ 78,929
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Fair value change of fuel price derivatives	24,301	2,073
Stock-based compensation	7,160	5,540
Depreciation, amortization and impairment	43,687	31,383
Gain on divestiture	(1,215)	0
Deferred taxes	9,026	14,631
Foreign currency remeasurement	24,460	0
Restructuring charge	8,567	0
Provision for credit losses	7,897	15,893
Loss on disposal of property, equipment and capitalized software	119	338
Changes in operating assets and liabilities:
Accounts receivable	(244,537)	(499,349)
Other assets	(32,769)	(4,647)
Accounts payable	177,671	181,664
Accrued expenses	(19,133)	7,289
Income taxes	10,130	(2,707)
Other liabilities	(3,661)	350
Amounts due under tax receivable agreement	(5,121)	(4,749)
Net cash provided by (used for) operating activities	53,015	(173,362)
Cash flows from investing activities
Purchases of property, equipment and capitalized software	(27,701)	(22,604)
Purchases of available-for-sale securities	(174)	(2,654)
Maturities of available-for-sale securities	364	166
Proceeds from divestitures	17,265	0
Net cash used for investing activities	(10,246)	(25,092)
Cash flows from financing activities
Excess tax benefits from equity instrument share-based payment arrangements	653	1,232
Repurchase of share-based awards to satisfy tax withholdings	(2,371)	(3,375)
Proceeds from stock option exercises	24	158
Net change in deposits	(73,079)	162,442
Net change in borrowed federal funds	50,500	0
Other debt	(482)	22,262
Net activity on 2014 revolving credit facility	(168,829)	0
Net change in securitized debt	90,382	0
Net activity on term loan	(13,750)	(7,500)
Purchase of shares of treasury stock	(22,011)	(19,765)
Net cash (used for) provided by financing activities	(138,963)	155,454
Effect of exchange rate changes on cash and cash equivalents	(4,237)	537
Net change in cash and cash equivalents	(100,431)	(42,463)
Cash and cash equivalents, beginning of period	284,763	361,486
Cash and cash equivalents, end of period	184,332	319,023
Supplemental cash flow information
Interest paid	25,391	16,822
Income taxes paid	$ 11,309	$ 32,115

Basis of Presentation

Basis of Presentation	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements Disclosure	1. Basis of Presentation The acronyms and abbreviations identified below are used in the accompanying unaudited condensed consolidated financial statements and the notes thereto. The following is provided to aid the reader and provide a reference point when reviewing the unaudited condensed consolidated financial statements. 2011 Credit Agreement Credit agreement entered into on May 23, 2011 among the Company, as borrower, WEX Card Holdings Australia Pty Ltd, a wholly-owned subsidiary of the Company, as specified designated borrower, Bank of America, N.A., as administrative agent and letter of credit issuer, and the other lenders party thereto 2013 Credit Agreement Amended and restated credit agreement entered into on January 18, 2013 by and among the Company and certain of our subsidiaries, as borrowers, and WEX Card Holdings Australia Pty Ltd, as specified designated borrower, with a lending syndicate 2014 Amendment Agreement Amendment and restatement agreement entered into on August 22, 2014, among the Company, the lenders party thereto, and Bank of America, N.A., as administrative agent 2014 Credit Agreement Second amended and restated credit agreement entered into on August 22, 2014, by and among the Company and certain of our subsidiaries, as borrowers, and WEX Card Holding Australia Adjusted Net Income or ANI A non-GAAP metric that adjusts net earnings attributable to WEX Inc. to exclude fair value changes of fuel-price related derivative instruments, the amortization of purchased intangibles, the impact of net foreign currency gains and losses, the expense associated with stock-based compensation, acquisition related expenses, the net impact of tax rate changes on the Company’s deferred tax asset and related changes in the tax-receivable agreement, deferred loan costs associated with the extinguishment of debt, certain non-cash asset impairment charges, restructuring charges, gains on the extinguishment of a portion of the tax receivable agreement, gains or losses on divestitures and adjustments attributable to non-controlling interests, as well as the related tax impacts of the adjustments ASU 2014-09 Accounting Standards Update No. 2014-09 Revenue from Contracts with Customers (Topic 606) ASU 2015-03 Accounting Standards Update No. 2015-03 Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs ASU 2015-04 Accounting Standards Update No. 2015-04 Compensation—Retirement Benefits (Topic 715): Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets Company WEX Inc. and all entities included in the unaudited condensed consolidated financial statements European fleet business Consist primarily of our European commercial fleet card portfolio acquired by the Company from ExxonMobil on December 1, 2014 ("Esso portfolio in Europe") Evolution1 EB Holdings Corp. and its subsidiaries which includes Evolution1, Inc., acquired by the Company on July 16, 2014 FASB Financial Accounting Standards Board GAAP Generally Accepted Accounting Principles in the United States Indenture Indenture dated as of January 30, 2013 among the Company, the guarantors listed therein, and The Bank of New York Mellon Trust Company, N.A., as trustee NCI Non-controlling interests Notes $400 million notes with a 4.75% fixed rate, issued on January 30, 2013 NOW deposits Negotiable order of withdrawal deposits Pacific Pride Pacific Pride Services, LLC, previously a wholly owned subsidiary, sold on July 29, 2014 rapid! PayCard rapid! PayCard, previously a line of business of the Company, sold on January 7, 2015 SEC Securities and Exchange Commission Securitization Subsidiary Southern Cross WEX 2015-1 Trust, a bankruptcy-remote subsidiary consolidated by the Company UNIK UNIK S.A., the Company's Brazilian 51 percent majority owned subsidiary WEX WEX Inc. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. They do not include all information and notes required by GAAP for complete financial statements. However, except as disclosed herein, there have been no material changes in the information disclosed in the notes to the consolidated financial statements included in the Annual Report on Form 10-K of WEX Inc. for the year ended December 31, 2014 . These unaudited condensed consolidated financial statements should be read in conjunction with the financial statements that are included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2014 , filed with the SEC on February 26, 2015 . In the opinion of management, all adjustments (including normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and six months ended June 30, 2015 are not necessarily indicative of the results that may be expected for any future quarter(s) or the year ending December 31, 2015 . Fair Value of Financial Instruments The carrying values of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses, and other liabilities approximate their respective fair values due to the short-term nature of such instruments. The carrying values of certificates of deposit, interest-bearing money market deposits, borrowed federal funds and credit agreement borrowings approximate their respective fair values as the interest rates on these financial instruments are variable. All other financial instruments are reflected at fair value on the condensed consolidated balance sheets.

New Accounting Standards

New Accounting Standards	6 Months Ended
	Jun. 30, 2015
Accounting Changes and Error Corrections [Abstract]
New Accounting Standards	2. New Accounting Standards In May 2014, the FASB issued ASU 2014-09 related to revenue recognition, which will supersede most existing revenue recognition guidance under U.S. GAAP. The new revenue recognition standard requires entities to recognize revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard permits the use of either the retrospective or cumulative effect transition method. On July 9, 2015, the the Board voted to defer the effective date by one year to interim and annual reporting periods beginning after December 15, 2017, and permitted early adoption of the standard, but not for periods beginning on or before the original effective date of December 15, 2016. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method. In April 2015, the FASB issued ASU 2015-03 related to the simplification of the presentation of debt issuance costs. The standard requires entities to present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs is reported as interest expense. The new standard is effective for interim and annual reporting periods beginning after December 15, 2015. Early adoption is permitted. Entities would apply the new guidance retrospectively to all prior periods and provide the applicable disclosures for a change in accounting principal: (i) the nature of and reason for the change in accounting principle; (ii) the transition method; (iii) a description of the prior-period information that has been retrospectively adjusted; and, (iv) the effect of the change on the financial statement line item. The adoption of this standard affects presentation only and, as such, is not expected to have a material impact on the Company's consolidated financial statements. In April 2015, the FASB issued ASU 2015-04 related to using a practical expedient for the measurement date of an employer’s defined benefit obligation and plan assets.The new standard gives an entity with a fiscal year-end that does not coincide with a calendar month-end the ability, as a practical expedient, to measure its defined benefit retirement obligations and related plan assets as of the month-end that is closest to its fiscal year-end. Additionally, the new standard provides guidance on accounting for (i) contributions to the plan and (ii) significant events that require a remeasurement (e.g., a plan amendment, settlement, or curtailment) that occur during the period between a month-end measurement date and the employer’s fiscal year-end. An entity should reflect the effects of those contributions or significant events in the measurement of the retirement benefit obligations and related plan assets. As a separate practical expedient, an entity may elect to measure the effects of a significant event as of the calendar month-end closest to the date of the significant event. The new standard is effective for interim and annual reporting periods beginning after December 15, 2015. Early adoption is permitted and the new standard should be applied prospectively. The Company does not believe that the adoption of ASU 2014-05 will have a material impact on its results of operations.

Business Acquisitions

Business Acquisitions	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Business Acquisitions	3. Business Acquisitions Esso portfolio in Europe On December 1, 2014, the Company acquired certain assets of the Esso portfolio in Europe through a majority owned subsidiary, WEX Europe Services Limited. The Company formed this entity during 2013 and has 75 percent ownership. The Company paid $379,458 in cash, which includes an $80,000 advance payment made in the third quarter of 2014. The transaction was financed through the Company’s cash on hand and existing credit facility. Under the terms of the transaction, WEX purchased ExxonMobil’s commercial fleet fuel card program which includes operations, funding, pricing, sales and marketing in nine countries in Europe. As part of the transaction, both parties have agreed to enter into a long term supply agreement to serve the current and future Esso Card customers and to grow the business. The Company entered into this transaction in order to expand its presence in the European market and to broaden its international footprint, while laying the foundation for further expansion. During the fourth quarter of 2014, the Company obtained preliminary information to assist in determining the fair values of certain tangible and intangible assets acquired and liabilities assumed in the Esso portfolio in Europe transaction. During the first six months of 2015, the Company obtained additional information to assist in determining the fair values of certain tangible and intangible assets acquired and liabilities assumed as of the acquisition date. Based on such information, the Company retrospectively adjusted the fiscal year 2014 comparative information resulting in an increase in goodwill of $405 , a decrease in accounts receivable of $2 , a decrease in the customer relationship intangible asset of $374 , a decrease in the licensing agreements intangible asset of $374 , and an increase in other tangible assets and liabilities, net, including consideration receivable of $345 . Based on such information, the Company recorded intangible assets and goodwill as described below. The Company is still reviewing the valuation as well as performing procedures to verify the completeness and accuracy of the data used in the independent valuation of all assets and liabilities. The Company has not finalized the purchase accounting. Goodwill related to this transaction is expected to be deductible for income tax purposes. The results of operations for the Esso portfolio in Europe are presented in the Company's Fleet Payment Solutions segment. The following is a summary of the preliminary allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired and consideration receivable) $ 379,458 Less: Accounts receivable 303,376 Other tangible assets and liabilities, net (8,365 ) Licensing agreements (a) 36,605 Customer relationships (b) 7,346 Recorded goodwill $ 40,496 (a) Weighted average life – 4.6 years . (b) Weighted average life – 7.2 years . Supplemental pro forma financial information related to the Esso portfolio in Europe acquisition has not been provided as it would be impracticable to do so. Historical financial information regarding the acquired assets is not accessible and, thus, the amounts would require estimates to be significant and render the disclosure irrelevant. Acquisition of Evolution1 On July 16, 2014, the Company acquired all of the outstanding stock of Evolution1, a leading provider of cloud-based technology and payment solutions within the healthcare industry, for approximately $532,174 in cash. The transaction was financed through the Company’s cash on hand and existing credit facility. Evolution1 developed and operates an all-in-one, multi-tenant technology platform, card products, and mobile offering that supports a full range of healthcare account types. This includes consumer-directed payments for health savings accounts, health reimbursement arrangements, flexible spending accounts, voluntary employee beneficiary associations, and defined contribution and wellness programs. The Company acquired Evolution1 to enhance the Company's capabilities and positioning in the growing healthcare market. During the third quarter of 2014, the Company obtained preliminary information to assist in determining the fair values of certain tangible and intangible assets acquired and liabilities assumed in the Evolution1 acquisition. During the fourth quarter of 2014 and the first half of 2015, the Company obtained additional information to assist in determining the fair values of certain tangible and intangible assets acquired and liabilities assumed as of the acquisition date. Based on such information, the Company retrospectively adjusted the fiscal year 2014 comparative information resulting in an increase in goodwill of $379 , an increase in other tangible assets and liabilities of $127 , and an increase in deferred income tax liabilities of $252 . There were no changes to the previously reported consolidated statements of operations or statements of cash flows. The valuation of all assets and liabilities have been finalized. Evolution1 had previously recorded goodwill on its financial statements from a prior acquisition, some of which is expected to be deductible for tax purposes. The results of operations for Evolution1 are presented in the Company's Other Payment Solutions segment. The following is a summary of the allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired) $ 532,174 Less: Accounts receivable 8,418 Accounts payable (175 ) Deferred tax liabilities, net (68,768 ) Other tangible assets and liabilities, net (3,712 ) Acquired software and developed technology (a) 70,000 Customer relationships (b) 211,000 Trade name (c) 7,900 Trade name (d) 11,000 Recorded goodwill $ 296,511 (a) Weighted average life – 6.4 years . (b) Weighted average life – 9.7 years . (c) Weighted average life – 9.9 years . (d) Indefinite-lived The following represents unaudited pro forma operational results as if Evolution1 had been included in the Company’s unaudited condensed consolidated statements of operations as of the beginning of the fiscal periods ended: Three Months Ended Six months Ended Revenue $ 222,741 $ 428,011 Net income attributable to WEX Inc. $ 37,180 $ 71,317 Pro forma net income attributable to WEX Inc. per common share: Net income per share – basic $ 0.96 $ 1.83 Net income per share – diluted $ 0.95 $ 1.83 The pro forma financial information assumes that the companies were combined as of January 1, 2013, and includes the business combination accounting impact from the acquisition, including acquisition related expenses, amortization charges from acquired intangible assets, interest expense for debt incurred in the acquisition and net income tax effects. The pro forma results of operations do not include any cost savings or other synergies that may result from the acquisition or any estimated integration costs that have been or will be incurred by the Company. The pro forma information as presented above is for informational purposes only and is not indicative of the results of operations that would have been achieved if the acquisition had taken place at the beginning of fiscal year 2014.

Sale of Subsidiary and Assets

Sale of Subsidiary and Assets	6 Months Ended
	Jun. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Sale of Subsidiary and Assets	4. Sale of Subsidiary and Assets rapid! PayCard On January 7, 2015, the Company sold the assets of its operations of rapid! PayCard for $20,000 , subject to final working capital adjustments which resulted in a pre-tax gain of approximately $1,215 . The Company's primary focus in the U.S. continues to be in the fleet, travel, and healthcare industries. As such, the Company divested the operations of rapid! PayCard. The operations of rapid! PayCard were not material to the Company's annual revenue, net income or earnings per share. The Company does not view this divestiture as a strategic shift in its Other Payment Solution segment. Pacific Pride On July 29, 2014, the Company sold its wholly owned subsidiary Pacific Pride for $49,664 , which resulted in a pre-tax gain of $27,490 . The transfer of the operations of Pacific Pride occurred on July 31, 2014. The Company decided to sell the operations of Pacific Pride as it did not align with the long-term strategy of the core fleet business. The operations of Pacific Pride were not material to the Company's annual revenue, net income or earnings per share. Simultaneously with the sale, the Company entered into a multi-year agreement with the buyer that will continue to allow WEX branded card acceptance at Pacific Pride locations. The Company does not view this divestiture as a strategic shift in its Fleet Payment Solution segment. The following is a summary of the allocation of the assets and liabilities sold: Consideration received $ 49,664 Less: Expenses associated with the sale 1,340 Accounts receivable 48,699 Accounts payable (53,001 ) Other tangible assets and liabilities, net 828 Customer relationships 3,727 Trademarks and trade name 1,444 Goodwill 19,137 Gain on sale $ 27,490

Reserves for Credit Losses

Reserves for Credit Losses	6 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Reserves for Credit Losses	5. Reserves for Credit Losses In general, the Company’s trade receivables provide for payment terms of 30 days or less. The portfolio of receivables consists of a large group of smaller balance homogeneous amounts that are collectively evaluated for impairment. No customer made up more than seven percent of the outstanding receivables at June 30, 2015 . Receivables are generally written off when they are 150 days past due or declaration of upon bankruptcy by the customer. The Company considers whether to adjust the reserve that is calculated by the analytic model primarily based on other factors, such as the actual charge-offs for the preceding reporting periods, expected charge-offs and recoveries for the subsequent reporting periods, a review of accounts receivable balances which become past due, changes in customer payment patterns, known fraudulent activity in the portfolio, as well as leading economic and market indicators. As of June 30, 2015 , approximately 98 percent of the outstanding balance of total trade accounts receivable was less than 60 days past due. As of June 30, 2014 , approximately 99 percent of the total trade accounts receivable outstanding balance was less than 60 days past due. The following table presents changes in reserves for credit losses related to accounts receivable: Six months ended June 30, 2015 2014 Balance, beginning of period $ 13,919 $ 10,396 Provision for credit losses 7,897 15,893 Charge-offs (15,019 ) (17,515 ) Recoveries of amounts previously charged-off 2,931 3,644 Currency translation (63 ) 119 Balance, end of period $ 9,665 $ 12,537

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	6. Goodwill and Other Intangible Assets Goodwill The changes in goodwill during the first six months of 2015 were as follows: Fleet Payment Solutions Segment Other Payment Solutions Segment Total Gross goodwill, January 1, 2015 $ 759,855 $ 374,424 $ 1,134,279 Impact of foreign currency translation (13,409 ) (1,558 ) (14,967 ) Disposal of certain assets (147 ) (12,386 ) (12,533 ) Gross goodwill, June 30, 2015 746,299 360,480 1,106,779 Accumulated impairment, June 30, 2015 (1,337 ) (16,171 ) (17,508 ) Net goodwill, June 30, 2015 $ 744,962 $ 344,309 $ 1,089,271 As described in Note 3, the Company adjusted the amount of goodwill as of December 31, 2014 in the accompanying unaudited condensed consolidated balance sheet to account for the measurement period adjustments to the Esso portfolio in Europe purchase price allocation. The Company had no impairments to goodwill during the six months ended June 30, 2015 . Management is currently evaluating its internal reporting structure and is in the process of determining the impact of the changes on the Company’s segment and goodwill reporting. Other Intangible Assets The changes in other intangible assets during the first six months of 2015 were as follows: Net Amortization Disposals Impact of foreign currency translation Net Carrying Definite-lived intangible assets Acquired software and developed technology $ 119,509 $ (5,758 ) $ — $ (1,597 ) $ 112,154 Customer relationships 309,450 (15,390 ) (2,329 ) (3,389 ) 288,342 Licensing agreements 35,341 (2,128 ) (164 ) (2,934 ) 30,115 Patent 1,245 (309 ) — 117 1,053 Trade names 15,373 (590 ) (723 ) (118 ) 13,942 Indefinite-lived intangible assets Trademarks and trade names 16,379 — — (258 ) 16,121 Total $ 497,297 $ (24,175 ) $ (3,216 ) $ (8,179 ) $ 461,727 The following table presents the estimated amortization expense related to the definite-lived intangible assets listed above for the remainder of 2015 and for each of the five succeeding fiscal years: Remaining 2015 $ 24,190 2016 $ 47,760 2017 $ 47,406 2018 $ 43,946 2019 $ 40,623 2020 $ 37,201 Other intangible assets, net consist of the following: June 30, 2015 December 31, 2014 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived intangible assets Acquired software and developed technology $ 148,481 $ (36,327 ) $ 112,154 $ 150,458 $ (30,949 ) $ 119,509 Customer relationships 382,723 (94,381 ) 288,342 393,942 (84,492 ) 309,450 Licensing agreements 32,590 (2,475 ) 30,115 35,726 (385 ) 35,341 Patent 2,552 (1,499 ) 1,053 2,697 (1,452 ) 1,245 Trademarks and trade names 16,675 (2,733 ) 13,942 17,786 (2,413 ) 15,373 $ 583,021 $ (137,415 ) 445,606 $ 600,609 $ (119,691 ) 480,918 Indefinite-lived intangible assets Trademarks and trade names 16,121 16,379 Total $ 461,727 $ 497,297

Earnings per Share

Earnings per Share	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Earnings per Share	7. Earnings per Share The following is a reconciliation of the income and share data used in the basic and diluted earnings per share computations for the three and six months ended June 30, 2015 and 2014 : Three months ended Six months ended 2015 2014 2015 2014 Net earnings attributable to WEX Inc. available for common stockholders – Basic and Diluted $ 26,492 $ 43,333 $ 48,837 $ 79,875 Weighted average common shares outstanding – Basic 38,739 38,856 38,798 38,911 Unvested restricted stock units 43 68 65 96 Stock options 17 22 17 24 Weighted average common shares outstanding – Diluted 38,799 38,946 38,880 39,031 No material amount of shares were considered anti-dilutive during the periods reported.

Derivative Instruments

Derivative Instruments	6 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	8. Derivative Instruments The Company is exposed to certain market risks relating to its ongoing business operations. Derivative instruments are utilized to manage the Company's commodity price risk. The Company enters into put and call option contracts related to the Company’s commodity price risk, which are based on the wholesale price of gasoline and the retail price of diesel fuel and settle on a monthly basis. These put and call option contracts, or fuel price derivative instruments, are designed to reduce the volatility of the Company’s cash flows associated with its fuel price-related earnings exposure in North America. During the fourth quarter of 2014 the Company suspended purchases under its fuel derivatives program due to unusually low prices in the commodities market. Management will continue to monitor the fuel price market and evaluate its alternatives as it relates to this hedging program. For the third quarter of 2015, the Company has purchased fuel price sensitive derivative instruments to hedge approximately 60 percent of our anticipated U.S. fuel-price related earnings exposure. For the fourth quarter of 2015 and first quarter of 2016, the amount hedged declines to 40 percent and 20 percent , respectively. At this time, there are no hedges beyond the first quarter of 2016. Beginning in April 2014, the Company initiated a partial foreign currency exchange hedging program. The Company uses currency forward contracts to offset the foreign currency impact of balance sheet translation. Prior to the first quarter of 2015, the Company managed foreign currency exchange exposure on an intra-quarter basis. Beginning in the first quarter of 2015, the Company held foreign currency exchange contracts that were outstanding over the quarter-end period, minimized foreign cash balances, and expanded the scope of its hedging program to include more currencies. The Company plans to discontinue the foreign currency hedging program in August of 2015. The realized and unrealized gains or losses on the currency forward contracts are reported in earnings within the same unaudited condensed consolidated statement of income line as the impact of the foreign currency translation, net foreign currency (loss) gain. Accounting guidance requires companies to recognize all derivative instruments as either assets or liabilities at fair value in the unaudited condensed consolidated balance sheet. The Company’s fuel price derivative instruments and foreign currency instruments do not qualify for hedge accounting treatment, and therefore, no such hedging designation has been made. Derivatives Not Designated as Hedging Instruments For derivative instruments that are not designated as hedging instruments, the gain or loss on the derivative is recognized in current earnings. As of June 30, 2015 , the Company had the following put and call option contracts related to the Company's commodity fuel price derivatives, which are not designated as hedging contracts and settle on a monthly basis: Aggregate Notional Amount (gallons) (a) Fuel price derivative instruments – unleaded fuel Option contracts settling July 2015 – March 2016 15,868 Fuel price derivative instruments – diesel Option contracts settling July 2015 – March 2016 7,857 Total fuel price derivative instruments 23,725 (a) The settlement of the put and call option contracts is based upon the New York Mercantile Exchange’s New York Harbor Reformulated Gasoline Blendstock for Oxygenate Blending and the U.S. Department of Energy’s weekly retail on-highway diesel fuel price for the month. As of June 30, 2015 , the Company had the following forward and spot contracts related to its foreign currency exchange contracts, which are not designated as hedging contracts and settle at various dates within approximately 40 days : Aggregate Notional Amount ($) Foreign currency exchange contracts 383,788 The following table presents information on the location and amounts of derivative fair values in the unaudited condensed consolidated balance sheets: Derivatives Classified as Assets Derivatives Classified as Liabilities June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 Derivatives Not Designated as Hedging Instruments Balance Fair Balance Fair Balance Sheet Location Fair Value Balance Sheet Location Fair Value Commodity contracts Fuel price $ 16,668 Fuel price $ 40,969 Fuel price derivatives, at fair value $ — Fuel price derivatives, at fair value $ — Foreign currency exchange contracts Other assets $ — Other assets $ — Other liabilities $ 1,433 Other liabilities $ — The following table presents information on the location and amounts of derivative gains and losses in the unaudited condensed consolidated statements of income: Amount of Gain or Derivatives Not Designated as Hedging Instruments Location of Gain or (Loss) Recognized in Three months ended June 30, Six months ended Income on Derivative 2015 2014 2015 2014 Commodity contracts Net realized and unrealized loss on fuel price derivatives $ (6,000 ) $ (7,561 ) $ (3,251 ) $ (5,716 ) Foreign currency exchange contracts Net foreign currency (loss) gain $ (5,838 ) $ (1,284 ) 21,967 $ (1,284 )

Financing and Other Debt

Financing and Other Debt	6 Months Ended
	Jun. 30, 2015
Debt Disclosure [Abstract]
Financing and Other Debt	9. Financing and Other Debt 2014 Credit Agreement As of June 30, 2015 , the Company has $248,470 of borrowings against its $700,000 revolving credit facility. The outstanding debt under the Company's amortizing term loan arrangement, which expires in January of 2018, totaled $472,500 at June 30, 2015 and $486,250 at December 31, 2014 . As of June 30, 2015 , amounts outstanding under the amortizing term loan bear interest at a rate of LIBOR plus 225 basis points . The revolving credit facility currently bears interest at a rate equal to, at our option, (a) LIBOR plus 225 basis points , (b) the prime rate plus 125 basis points for our domestic borrowings; and the Eurocurrency rate plus 225 basis points for our international borrowings. Borrowed Federal Funds In the second quarter of 2015, the Company increased its federal funds lines of credit by $135,000 to $260,000 . As of June 30, 2015 , the Company had $50,500 outstanding, at a rate of 0.375 percent , on its $260,000 federal funds lines of credit. As of December 31, 2014 the Company had no outstanding balance on its $125,000 of available credit on these lines. UNIK debt UNIK had approximately $6,446 of debt as of June 30, 2015 , and $7,975 of debt as of December 31, 2014 . UNIK's debt is comprised of various credit facilities held in Brazil, with various maturity dates. The weighted average annual interest rate was 13.5 percent as of June 30, 2015 , and 13.9 percent as of December 31, 2014 . This debt is classified in Other debt on the Company’s unaudited condensed consolidated balance sheets for the periods presented. Participation debt During the second quarter of 2014, WEX Bank entered into an agreement with a third party bank to fund a customer balance that exceeded WEX Bank's lending limit to an individual customer. This borrowing carries a variable interest rate of 3-month LIBOR plus a margin of 2.25 percent . The balance of the debt as of both June 30, 2015 and December 31, 2014 , was $45,000 . The participation debt balance will fluctuate on a daily basis based on customer funding needs, and will range from $0 to $45,000 . The participation debt agreement will mature on April 1, 2016 . This debt is classified in Other debt on the Company’s unaudited condensed consolidated balance sheets for the periods presented. Securitization facility On April 28, 2015, the Company entered into a one year securitized debt agreement with a bank. Under the terms of the agreement, each month, on a revolving basis, the Company sells certain of its Australian receivables to a bankruptcy-remote subsidiary consolidated by the Company ("Securitization Subsidiary"). The Securitization Subsidiary, in turn, uses the receivables as collateral to issue asset-backed commercial paper ("securitized debt") for approximately 85 percent of the securitized receivables. The amount collected on the securitized receivables is restricted to pay the securitized debt and is not available for general corporate purposes. The Company pays a variable interest rate on the outstanding balance of the securitized debt, based on the Australian Bank Bill Rate plus an applicable margin. The interest rate as of June 30, 2015, was 2.89 percent . As of June 30, 2015, the Company had $89,176 of securitized debt.

Fair Value

Fair Value	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Fair Value	10. Fair Value The Company holds mortgage-backed securities, fixed income and equity securities, derivatives (see Note 8, Derivative Instruments) and certain other financial instruments which are carried at fair value. The Company determines fair value based upon quoted prices when available or through the use of alternative approaches, such as model pricing, when market quotes are not readily accessible or available. In determining the fair value of the Company’s obligations, various factors are considered, including: closing exchange or over-the-counter market price quotations; time value and volatility factors underlying options and derivatives; price activity for equivalent instruments; and the Company’s own credit standing. These valuation techniques may be based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs create the following fair value hierarchy: • Level 1 – Quoted prices for identical instruments in active markets. • Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. • Level 3 – Instruments whose significant value drivers are unobservable. The following table presents the Company’s assets that are measured at fair value and the related hierarchy levels as of June 30, 2015 : Fair Value Measurements at Reporting Date Using June 30, 2015 Quoted Prices Significant Significant Assets: Mortgage-backed securities $ 665 $ — $ 665 $ — Asset-backed securities 996 — 996 — Municipal bonds 488 — 488 — Equity securities 16,523 16,523 — — Total available-for-sale securities $ 18,672 $ 16,523 $ 2,149 $ — Executive deferred compensation plan trust (a) $ 6,124 $ 6,124 $ — $ — Fuel price derivatives – unleaded fuel (b) $ 10,590 $ — $ 10,590 $ — Fuel price derivatives – diesel (b) 6,078 — — 6,078 Total fuel price derivatives $ 16,668 $ — $ 10,590 $ 6,078 Liabilities: Foreign currency exchange contracts (c) $ 1,433 $ — $ 1,433 $ — (a) The fair value of these instruments is recorded in Other assets. (b) The balance sheet presentation combines unleaded fuel and diesel fuel positions. (c) The fair value of these instruments is recorded in Other liabilities. The following table presents the Company’s assets and liabilities that are measured at fair value and the related hierarchy levels as of December 31, 2014 : Fair Value Measurements at Reporting Date Using December 31, 2014 Quoted Prices Significant Significant Assets: Mortgage-backed securities $ 810 $ — $ 810 $ — Asset-backed securities 1,165 — 1,165 — Municipal bonds 554 — 554 — Equity securities 16,411 16,411 — — Total available-for-sale securities $ 18,940 $ 16,411 $ 2,529 $ — Executive deferred compensation plan trust (a) $ 5,927 $ 5,927 $ — $ — Fuel price derivatives – unleaded fuel (b) $ 29,120 $ — $ 29,120 $ — Fuel price derivatives – diesel (b) 11,849 — — 11,849 Total fuel price derivatives $ 40,969 $ — $ 29,120 $ 11,849 (a) The fair value of these instruments is recorded in Other assets. (b) The balance sheet presentation combines unleaded fuel and diesel fuel positions. The following table presents a reconciliation of the beginning and ending balances for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the three months ended : June 30, 2015 June 30, 2014 Fuel Price Fuel Price Beginning balance $ 10,261 $ (623 ) Total gains and (losses) – realized/unrealized Included in earnings (a) (4,183 ) (1,302 ) Included in other comprehensive income — — Purchases, issuances and settlements — — Transfers (in)/out of Level 3 — — Ending balance $ 6,078 $ (1,925 ) (a) Gains and losses (realized and unrealized) associated with fuel price derivatives, included in earnings for the three months ended June 30, 2015 and 2014 , are reported in net realized and unrealized losses on fuel price derivatives on the unaudited condensed consolidated statements of income. The following table presents a reconciliation of the beginning and ending balances for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the six months ended: June 30, 2015 June 30, 2014 Fuel Price Fuel Price Beginning balance $ 11,848 $ (2,142 ) Total gains and (losses) – realized/unrealized Included in earnings (a) (5,770 ) 217 Included in other comprehensive income — — Purchases, issuances and settlements — — Transfers (in)/out of Level 3 — — Ending balance $ 6,078 $ (1,925 ) (a) Gains and losses (realized and unrealized) associated with fuel price derivatives, included in earnings for the six months ended June 30, 2015 and 2014 , are reported in net realized and unrealized losses on fuel price derivatives on the unaudited condensed consolidated statements of income. $400 Million Notes outstanding The Notes outstanding as of June 30, 2015 , have a carrying value of $400,000 and fair value of $385,500 . As of December 31, 2014 , the carrying value of the $400,000 in Notes outstanding had a fair value of $388,000 . The fair value is based on market rates for the issuance of our debt. The Company determined the fair value of its Notes outstanding are classified as Level 2 in the fair value hierarchy. Available-for-sale securities and executive deferred compensation plan trust When available, the Company uses quoted market prices to determine the fair value of available-for-sale securities; such items are classified in Level 1 of the fair-value hierarchy. These securities primarily consist of exchange-traded equity securities. For mortgage-backed and asset-backed debt securities and bonds, the Company generally uses quoted prices for recent trading activity of assets with similar characteristics to the debt security or bond being valued. The securities and bonds priced using such methods are generally classified as Level 2. The obligations related to the deferred compensation plan trust are classified as Level 1 in the fair value hierarchy because the fair value is determined using quoted prices for identical instruments in active markets. Foreign currency exchange contracts Derivatives include foreign currency forward contracts. Our foreign currency forward contracts are valued using an income approach (Level 2) based on the spot rate less the contract rate multiplied by the notional amount. We consider counterparty credit risk in the valuation of our derivatives. However, counterparty credit risk did not impact the valuation of our derivatives during 2014 and 2015. Fuel price derivative instruments The majority of fuel price derivative instruments entered into by the Company are executed over-the-counter and are valued using internal valuation techniques, as no quoted market prices exist for such instruments. The valuation technique and inputs depend on the type of derivative and the nature of the underlying instrument. The principal technique used to value these instruments is a comparison of the spot price of the underlying instrument to its related futures curve adjusted for the Company’s assumptions of volatility and present value, where appropriate. The fair values of derivative contracts reflect the expected cash the Company will pay or receive upon settlement of the respective contracts. The key inputs depend upon the type of derivative and the nature of the underlying instrument and include interest rate yield curves, the spot price of the underlying instruments, volatility, and correlation. The item is placed in either Level 2 or Level 3 depending on the observability of the significant inputs to the model. Correlation and inputs with longer tenures are generally less observable. Fuel price derivative instruments – diesel. The assumptions used in the valuation of the diesel fuel price derivative instruments use both observable and unobservable inputs. There is a lack of price transparency with respect to forward prices for diesel fuel. Such unobservable inputs are significant to the diesel fuel derivative contract valuation methodology. Quantitative Information About Level 3 Fair Value Measurements. The significant unobservable inputs used in the fair value measurement of the Company’s diesel fuel price derivative instruments designated as Level 3 as of June 30, 2015 , are as follows: Fair Value Valuation Unobservable Input Range Fuel price derivatives – diesel $ 6,078 Option model Future retail price of diesel fuel after June 30, 2015 $3.72 – 3.86 Sensitivity to Changes in Significant Unobservable Inputs. As presented in the table above, the significant unobservable inputs used in the fair value measurement of the Company’s diesel fuel price derivative instruments are the future retail price of diesel fuel from the third quarter of 2015 through the first quarter of 2016 . Significant changes in these unobservable inputs in isolation would result in a significant change in the fair value measurement.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Accumulated Other Comprehensive Income	11. Accumulated Other Comprehensive Income A reconciliation of accumulated other comprehensive income for the three month periods ended June 30, 2015 and 2014 , is as follows: 2015 2014 Unrealized Gains and Losses on Available- for-Sale Securities Foreign Currency Items Unrealized Gains and Losses on Available- for-Sale Securities Foreign Currency Items Beginning balance $ (38 ) $ (75,135 ) $ (359 ) $ (1,063 ) Other comprehensive (loss) income (140 ) 7,791 152 7,407 Ending balance $ (178 ) $ (67,344 ) $ (207 ) $ 6,344 A reconciliation of accumulated other comprehensive income for the six month periods ended June 30, 2015 and 2014 , is as follows: 2015 2014 Unrealized Gains and Losses on Available- for-Sale Securities Foreign Currency Items Unrealized Gains and Losses on Available- for-Sale Securities Foreign Currency Items Beginning balance $ (129 ) $ (50,452 ) $ (433 ) $ (15,062 ) Other comprehensive (loss) income (49 ) (16,892 ) 226 21,406 Ending balance $ (178 ) $ (67,344 ) $ (207 ) $ 6,344 No amounts were reclassified from accumulated other comprehensive income in the periods presented. The change in foreign currency items is primarily due to the foreign currency translation of non-cash assets such as goodwill and other intangible assets related to the Company's foreign subsidiaries. The total tax effect on accumulated unrealized losses, as of June 30, 2015 , was $933 , and the total tax effect on accumulated unrealized net gain, as of June 30, 2014 , was $364 .

Non-controlling interests

Non-controlling interests	6 Months Ended
	Jun. 30, 2015
Noncontrolling Interest [Abstract]
Non-controlling interests	12. Non-controlling interests On August 30, 2012 , the Company acquired a 51 percent ownership interest in UNIK. Redeemable non-controlling interest was measured at fair value at the date of acquisition. The redeemable non-controlling interest is reported on the Company’s unaudited condensed consolidated balance sheets as “Redeemable non-controlling interest." A reconciliation of redeemable non-controlling interest for the three and six month periods ended June 30, 2015 and June 30, 2014 , is as follows: Three months ended Six months ended 2015 2014 2015 2014 Balance, beginning of period $ 13,647 $ 19,338 $ 16,590 $ 18,729 Net gain (loss) attributable to redeemable non-controlling interest 670 (82 ) 659 (249 ) Currency translation adjustment 675 476 (2,257 ) 1,252 Ending balance $ 14,992 $ 19,732 $ 14,992 $ 19,732 On December 1, 2014, WEX acquired the assets of ExxonMobil's Esso portfolio in Europe through its majority owned subsidiary, WEX Europe Services Limited. The Company formed this entity during 2013 and has 75 percent ownership. A reconciliation of non-controlling interest for the three and six month periods ended June 30, 2015 and June 30, 2014 is as follows: Three months ended Six months ended 2015 2014 2015 2014 Balance, beginning of period $ 13,644 $ 228 $ 17,396 $ 519 Non-controlling interest investment — 1,033 — 1,033 Net loss attributable to non-controlling interest (762 ) (402 ) (3,063 ) (697 ) Currency translation adjustment 283 — (1,168 ) 4 Ending balance $ 13,165 $ 859 $ 13,165 $ 859

Income Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	13. Income Taxes Undistributed earnings of certain foreign subsidiaries of the Company amounted to $11,494 at June 30, 2015 , and $7,733 at December 31, 2014 . These earnings are considered to be indefinitely reinvested, and accordingly, no U.S. federal and state income taxes have been provided thereon. Upon distribution of these earnings in the form of dividends or otherwise, the Company would be subject to both U.S. income taxes (subject to an adjustment for foreign tax credits) and withholding taxes payable to the various foreign countries. The Company has determined that the amount of taxes attributable to these undistributed earnings is not practicably determinable.

Commitments and Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	14. Commitments and Contingencies Litigation The Company is involved in pending litigation in the ordinary course of business. In the opinion of management, such litigation will not have a material adverse effect on the Company’s consolidated financial position, results of operations or cash flows.

Restructuring

Restructuring	6 Months Ended
	Jun. 30, 2015
Restructuring and Related Activities [Abstract]
Restructuring	15. Restructuring In the first half of 2015 the Company recorded initial restructuring costs of approximately $8,559 related to the Company's global review of operations. This global review identified certain initiatives to further streamline the business, improve the Company's efficiency, and to globalize the Company's operations, all with an objective to improve scale and increase profitability going forward. The costs related to this initiative are employee termination benefits. No costs were paid during the second quarter of 2015. These costs are expected to be paid during the remainder of 2015 and 2016. The Company has determined that the amount of expense related to this program is probable and estimable and has recorded the impact on the unaudited condensed consolidated statements of income and in Accrued expenses on the unaudited condensed consolidated balance sheet. The following table presents the Company’s restructuring charges for the six months ended June 30, 2015: Accrual Balance at December 31, 2014 Restructuring Charges Reserve Release Cash Paid Impact of foreign currency translation Accrual Balance at June 30, 2015 2015 Restructuring: Employee separation costs $ — 8,559 — — $ 263 $ 8,822

Segment Information

Segment Information	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Segment Information	16. Segment Information Operating segments are defined as components of an enterprise about which separate financial information is available that is evaluated regularly by the chief operating decision maker in deciding how to allocate resources and in assessing performance. The Company’s chief operating decision maker is its Chief Executive Officer. The operating segments are reviewed separately because each operating segment represents a strategic business unit that generally offers different products and serves different markets. The operating segments are aggregated into the two reportable segments as described below. The Company’s chief operating decision maker evaluates the operating results of the Company’s operating and reportable segments based upon revenues and adjusted pre-tax income before NCI which adjusts income before income taxes to exclude fair value changes of fuel price derivative instruments, net foreign currency gains and losses, the amortization of acquired intangible assets, the expense associated with stock-based compensation, acquisition related expenses and adjustments, the net impact of tax rate changes on the Company’s deferred tax asset and related changes in the tax-receivable agreement, deferred loan costs associated with the extinguishment of debt, certain non-cash asset impairment charges, gains on the extinguishment of a portion of the tax receivable agreement, restructuring charges, gain or losses on divestitures and adjustments attributable to non-controlling interests. The Company operates in two reportable segments, Fleet Payment Solutions and Other Payment Solutions. The Fleet Payment Solutions segment provides customers with payment and transaction processing services specifically designed for the needs of vehicle fleet customers. This segment also provides information management services to these fleet customers. The Other Payment Solutions segment provides customers with a payment processing solution for their corporate purchasing and transaction monitoring needs. Revenue in this segment is derived from our corporate purchase cards and virtual and prepaid card products. The corporate purchase card products are used by businesses to facilitate purchases of products and to utilize the Company’s information management capabilities. The results of operations for Evolution1 are presented in the Company's Other Payment Solutions segment. Evolution1 contributed net revenues of approximately $48,860 and are not significant to the adjusted pre-tax income before NCI. Management is currently evaluating its internal reporting structure and is in the process of determining the impact of the changes on the Company’s segment and goodwill reporting. Net realized and unrealized losses on derivative instruments are allocated to the Fleet Payment Solutions segment in the computation of segment results for internal evaluation purposes. Total assets are not allocated to the segments. Beginning in the second quarter of 2015, adjusted net income attributable to WEX Inc. excludes net foreign currency gains and losses. For comparative purposes, adjusted net income attributable to WEX Inc. for the prior periods has been adjusted to reflect the exclusion of net foreign currency gains and losses and differs from the figure previously reported due to this adjustment. Management believes this information is useful to investors to facilitate comparison of operating results and better identify trends in our businesses. The following table presents the Company’s reportable segment results on an adjusted pre-tax net income before NCI basis for the three months ended June 30, 2015 and 2014 : Total Revenues Operating Interest Expense Depreciation and Amortization Adjusted Pre-Tax Income before NCI Three months ended June 30, 2015 Fleet payment solutions $ 135,520 $ 421 $ 6,975 $ 49,490 Other payment solutions 78,133 936 1,768 26,426 Total $ 213,653 $ 1,357 $ 8,743 $ 75,916 Three months ended June 30, 2014 Fleet payment solutions $ 145,828 $ 586 $ 6,436 $ 57,621 Other payment solutions 55,753 1,013 410 24,714 Total $ 201,581 $ 1,599 $ 6,846 $ 82,335 The following table presents the Company’s reportable segment results on an adjusted pre-tax net income before NCI basis for the six months ended June 30, 2015 and 2014 : Total Revenues Operating Interest Expense Depreciation and Amortization Adjusted Pre-Tax Income before NCI Six months ended June 30, 2015 Fleet payment solutions $ 264,010 $ 1,161 $ 14,433 $ 94,774 Other payment solutions 151,928 1,775 3,538 52,109 Total $ 415,938 $ 2,936 $ 17,971 $ 146,883 Six months Ended June 30, 2014 Fleet payment solutions $ 281,263 $ 1,110 $ 12,813 $ 105,328 Other payment solutions 102,386 1,777 764 40,920 Total $ 383,649 $ 2,887 $ 13,577 $ 146,248 The following table reconciles adjusted pre-tax income before NCI to income before income taxes: Three months ended Six months ended 2015 2014 2015 2014 Adjusted pre-tax income before NCI $ 75,916 $ 82,335 $ 146,883 $ 146,248 Unrealized loss on fuel price derivatives (14,956 ) (4,896 ) (24,301 ) (2,073 ) Net foreign currency (loss) gain (2,161 ) 1,238 (6,537 ) 2,271 Amortization of acquired intangible assets (12,016 ) (8,330 ) (24,175 ) (16,617 ) Stock-based compensation (3,942 ) (3,117 ) (7,160 ) (5,540 ) Expenses and adjustments related to acquisitions — (500 ) — (500 ) Restructuring — — (8,559 ) — Gain on divestitures — — 1,215 — Income before income taxes $ 42,841 $ 66,730 $ 77,366 $ 123,789

New Accounting Standards (Polic

New Accounting Standards (Policies)	6 Months Ended
	Jun. 30, 2015
Accounting Changes and Error Corrections [Abstract]
New Accounting Standards	In May 2014, the FASB issued ASU 2014-09 related to revenue recognition, which will supersede most existing revenue recognition guidance under U.S. GAAP. The new revenue recognition standard requires entities to recognize revenue for the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The standard permits the use of either the retrospective or cumulative effect transition method. On July 9, 2015, the the Board voted to defer the effective date by one year to interim and annual reporting periods beginning after December 15, 2017, and permitted early adoption of the standard, but not for periods beginning on or before the original effective date of December 15, 2016. The Company is evaluating the effect that ASU 2014-09 will have on its consolidated financial statements and related disclosures. The Company has not yet selected a transition method. In April 2015, the FASB issued ASU 2015-03 related to the simplification of the presentation of debt issuance costs. The standard requires entities to present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs is reported as interest expense. The new standard is effective for interim and annual reporting periods beginning after December 15, 2015. Early adoption is permitted. Entities would apply the new guidance retrospectively to all prior periods and provide the applicable disclosures for a change in accounting principal: (i) the nature of and reason for the change in accounting principle; (ii) the transition method; (iii) a description of the prior-period information that has been retrospectively adjusted; and, (iv) the effect of the change on the financial statement line item. The adoption of this standard affects presentation only and, as such, is not expected to have a material impact on the Company's consolidated financial statements. In April 2015, the FASB issued ASU 2015-04 related to using a practical expedient for the measurement date of an employer’s defined benefit obligation and plan assets.The new standard gives an entity with a fiscal year-end that does not coincide with a calendar month-end the ability, as a practical expedient, to measure its defined benefit retirement obligations and related plan assets as of the month-end that is closest to its fiscal year-end. Additionally, the new standard provides guidance on accounting for (i) contributions to the plan and (ii) significant events that require a remeasurement (e.g., a plan amendment, settlement, or curtailment) that occur during the period between a month-end measurement date and the employer’s fiscal year-end. An entity should reflect the effects of those contributions or significant events in the measurement of the retirement benefit obligations and related plan assets. As a separate practical expedient, an entity may elect to measure the effects of a significant event as of the calendar month-end closest to the date of the significant event. The new standard is effective for interim and annual reporting periods beginning after December 15, 2015. Early adoption is permitted and the new standard should be applied prospectively. The Company does not believe that the adoption of ASU 2014-05 will have a material impact on its results of operations.

Basis of Presentation (Tables)

Basis of Presentation (Tables)	6 Months Ended
	Jun. 30, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Glossary of Terms in Document	The following is provided to aid the reader and provide a reference point when reviewing the unaudited condensed consolidated financial statements. 2011 Credit Agreement Credit agreement entered into on May 23, 2011 among the Company, as borrower, WEX Card Holdings Australia Pty Ltd, a wholly-owned subsidiary of the Company, as specified designated borrower, Bank of America, N.A., as administrative agent and letter of credit issuer, and the other lenders party thereto 2013 Credit Agreement Amended and restated credit agreement entered into on January 18, 2013 by and among the Company and certain of our subsidiaries, as borrowers, and WEX Card Holdings Australia Pty Ltd, as specified designated borrower, with a lending syndicate 2014 Amendment Agreement Amendment and restatement agreement entered into on August 22, 2014, among the Company, the lenders party thereto, and Bank of America, N.A., as administrative agent 2014 Credit Agreement Second amended and restated credit agreement entered into on August 22, 2014, by and among the Company and certain of our subsidiaries, as borrowers, and WEX Card Holding Australia Adjusted Net Income or ANI A non-GAAP metric that adjusts net earnings attributable to WEX Inc. to exclude fair value changes of fuel-price related derivative instruments, the amortization of purchased intangibles, the impact of net foreign currency gains and losses, the expense associated with stock-based compensation, acquisition related expenses, the net impact of tax rate changes on the Company’s deferred tax asset and related changes in the tax-receivable agreement, deferred loan costs associated with the extinguishment of debt, certain non-cash asset impairment charges, restructuring charges, gains on the extinguishment of a portion of the tax receivable agreement, gains or losses on divestitures and adjustments attributable to non-controlling interests, as well as the related tax impacts of the adjustments ASU 2014-09 Accounting Standards Update No. 2014-09 Revenue from Contracts with Customers (Topic 606) ASU 2015-03 Accounting Standards Update No. 2015-03 Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs ASU 2015-04 Accounting Standards Update No. 2015-04 Compensation—Retirement Benefits (Topic 715): Practical Expedient for the Measurement Date of an Employer’s Defined Benefit Obligation and Plan Assets Company WEX Inc. and all entities included in the unaudited condensed consolidated financial statements European fleet business Consist primarily of our European commercial fleet card portfolio acquired by the Company from ExxonMobil on December 1, 2014 ("Esso portfolio in Europe") Evolution1 EB Holdings Corp. and its subsidiaries which includes Evolution1, Inc., acquired by the Company on July 16, 2014 FASB Financial Accounting Standards Board GAAP Generally Accepted Accounting Principles in the United States Indenture Indenture dated as of January 30, 2013 among the Company, the guarantors listed therein, and The Bank of New York Mellon Trust Company, N.A., as trustee NCI Non-controlling interests Notes $400 million notes with a 4.75% fixed rate, issued on January 30, 2013 NOW deposits Negotiable order of withdrawal deposits Pacific Pride Pacific Pride Services, LLC, previously a wholly owned subsidiary, sold on July 29, 2014 rapid! PayCard rapid! PayCard, previously a line of business of the Company, sold on January 7, 2015 SEC Securities and Exchange Commission Securitization Subsidiary Southern Cross WEX 2015-1 Trust, a bankruptcy-remote subsidiary consolidated by the Company UNIK UNIK S.A., the Company's Brazilian 51 percent majority owned subsidiary WEX WEX Inc.

Business Acquisitions (Tables)

Business Acquisitions (Tables)	6 Months Ended
	Jun. 30, 2015
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following is a summary of the preliminary allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired and consideration receivable) $ 379,458 Less: Accounts receivable 303,376 Other tangible assets and liabilities, net (8,365 ) Licensing agreements (a) 36,605 Customer relationships (b) 7,346 Recorded goodwill $ 40,496 (a) Weighted average life – 4.6 years . (b) Weighted average life – 7.2 years . The following is a summary of the allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired) $ 532,174 Less: Accounts receivable 8,418 Accounts payable (175 ) Deferred tax liabilities, net (68,768 ) Other tangible assets and liabilities, net (3,712 ) Acquired software and developed technology (a) 70,000 Customer relationships (b) 211,000 Trade name (c) 7,900 Trade name (d) 11,000 Recorded goodwill $ 296,511 (a) Weighted average life – 6.4 years . (b) Weighted average life – 9.7 years . (c) Weighted average life – 9.9 years . (d) Indefinite-lived The following is a summary of the preliminary allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired and consideration receivable) $ 379,458 Less: Accounts receivable 303,376 Other tangible assets and liabilities, net (8,365 ) Licensing agreements (a) 36,605 Customer relationships (b) 7,346 Recorded goodwill $ 40,496 (a) Weighted average life – 4.6 years . (b) Weighted average life – 7.2 years .
Business Acquisition, Pro Forma Information	The following represents unaudited pro forma operational results as if Evolution1 had been included in the Company’s unaudited condensed consolidated statements of operations as of the beginning of the fiscal periods ended: Three Months Ended Six months Ended Revenue $ 222,741 $ 428,011 Net income attributable to WEX Inc. $ 37,180 $ 71,317 Pro forma net income attributable to WEX Inc. per common share: Net income per share – basic $ 0.96 $ 1.83 Net income per share – diluted $ 0.95 $ 1.83

Sale of Subsidiary and Assets (

Sale of Subsidiary and Assets (Tables)	6 Months Ended
	Jun. 30, 2015
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	The following is a summary of the allocation of the assets and liabilities sold: Consideration received $ 49,664 Less: Expenses associated with the sale 1,340 Accounts receivable 48,699 Accounts payable (53,001 ) Other tangible assets and liabilities, net 828 Customer relationships 3,727 Trademarks and trade name 1,444 Goodwill 19,137 Gain on sale $ 27,490

Reserves for Credit Losses (Tab

Reserves for Credit Losses (Tables)	6 Months Ended
	Jun. 30, 2015
Receivables [Abstract]
Changes in Reserves for Credit Losses Related to Accounts Receivable	The following table presents changes in reserves for credit losses related to accounts receivable: Six months ended June 30, 2015 2014 Balance, beginning of period $ 13,919 $ 10,396 Provision for credit losses 7,897 15,893 Charge-offs (15,019 ) (17,515 ) Recoveries of amounts previously charged-off 2,931 3,644 Currency translation (63 ) 119 Balance, end of period $ 9,665 $ 12,537

Goodwill and Other Intangible31

Goodwill and Other Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Goodwill	The changes in goodwill during the first six months of 2015 were as follows: Fleet Payment Solutions Segment Other Payment Solutions Segment Total Gross goodwill, January 1, 2015 $ 759,855 $ 374,424 $ 1,134,279 Impact of foreign currency translation (13,409 ) (1,558 ) (14,967 ) Disposal of certain assets (147 ) (12,386 ) (12,533 ) Gross goodwill, June 30, 2015 746,299 360,480 1,106,779 Accumulated impairment, June 30, 2015 (1,337 ) (16,171 ) (17,508 ) Net goodwill, June 30, 2015 $ 744,962 $ 344,309 $ 1,089,271
Changes in Other Intangible Assets	The changes in other intangible assets during the first six months of 2015 were as follows: Net Amortization Disposals Impact of foreign currency translation Net Carrying Definite-lived intangible assets Acquired software and developed technology $ 119,509 $ (5,758 ) $ — $ (1,597 ) $ 112,154 Customer relationships 309,450 (15,390 ) (2,329 ) (3,389 ) 288,342 Licensing agreements 35,341 (2,128 ) (164 ) (2,934 ) 30,115 Patent 1,245 (309 ) — 117 1,053 Trade names 15,373 (590 ) (723 ) (118 ) 13,942 Indefinite-lived intangible assets Trademarks and trade names 16,379 — — (258 ) 16,121 Total $ 497,297 $ (24,175 ) $ (3,216 ) $ (8,179 ) $ 461,727
Estimated Amortization Expense Related to Definite Lived Intangible Assets	The following table presents the estimated amortization expense related to the definite-lived intangible assets listed above for the remainder of 2015 and for each of the five succeeding fiscal years: Remaining 2015 $ 24,190 2016 $ 47,760 2017 $ 47,406 2018 $ 43,946 2019 $ 40,623 2020 $ 37,201
Other Intangible Assets	Other intangible assets, net consist of the following: June 30, 2015 December 31, 2014 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived intangible assets Acquired software and developed technology $ 148,481 $ (36,327 ) $ 112,154 $ 150,458 $ (30,949 ) $ 119,509 Customer relationships 382,723 (94,381 ) 288,342 393,942 (84,492 ) 309,450 Licensing agreements 32,590 (2,475 ) 30,115 35,726 (385 ) 35,341 Patent 2,552 (1,499 ) 1,053 2,697 (1,452 ) 1,245 Trademarks and trade names 16,675 (2,733 ) 13,942 17,786 (2,413 ) 15,373 $ 583,021 $ (137,415 ) 445,606 $ 600,609 $ (119,691 ) 480,918 Indefinite-lived intangible assets Trademarks and trade names 16,121 16,379 Total $ 461,727 $ 497,297

Earnings per Share (Tables)

Earnings per Share (Tables)	6 Months Ended
	Jun. 30, 2015
Earnings Per Share [Abstract]
Reconciliation of Income and Share Data Used in Basic and Diluted Earnings Per Share Computations	The following is a reconciliation of the income and share data used in the basic and diluted earnings per share computations for the three and six months ended June 30, 2015 and 2014 : Three months ended Six months ended 2015 2014 2015 2014 Net earnings attributable to WEX Inc. available for common stockholders – Basic and Diluted $ 26,492 $ 43,333 $ 48,837 $ 79,875 Weighted average common shares outstanding – Basic 38,739 38,856 38,798 38,911 Unvested restricted stock units 43 68 65 96 Stock options 17 22 17 24 Weighted average common shares outstanding – Diluted 38,799 38,946 38,880 39,031

Derivative Instruments (Tables)

Derivative Instruments (Tables)	6 Months Ended
	Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Put and Call Option Contracts	As of June 30, 2015 , the Company had the following put and call option contracts related to the Company's commodity fuel price derivatives, which are not designated as hedging contracts and settle on a monthly basis: Aggregate Notional Amount (gallons) (a) Fuel price derivative instruments – unleaded fuel Option contracts settling July 2015 – March 2016 15,868 Fuel price derivative instruments – diesel Option contracts settling July 2015 – March 2016 7,857 Total fuel price derivative instruments 23,725 (a) The settlement of the put and call option contracts is based upon the New York Mercantile Exchange’s New York Harbor Reformulated Gasoline Blendstock for Oxygenate Blending and the U.S. Department of Energy’s weekly retail on-highway diesel fuel price for the month.
Schedule of Forward and Spot Contracts related to Foreign Exchange Contracts	As of June 30, 2015 , the Company had the following forward and spot contracts related to its foreign currency exchange contracts, which are not designated as hedging contracts and settle at various dates within approximately 40 days : Aggregate Notional Amount ($) Foreign currency exchange contracts 383,788
Location and Amounts of Derivative Fair Values in Condensed Consolidated Balance Sheets	The following table presents information on the location and amounts of derivative fair values in the unaudited condensed consolidated balance sheets: Derivatives Classified as Assets Derivatives Classified as Liabilities June 30, 2015 December 31, 2014 June 30, 2015 December 31, 2014 Derivatives Not Designated as Hedging Instruments Balance Fair Balance Fair Balance Sheet Location Fair Value Balance Sheet Location Fair Value Commodity contracts Fuel price $ 16,668 Fuel price $ 40,969 Fuel price derivatives, at fair value $ — Fuel price derivatives, at fair value $ — Foreign currency exchange contracts Other assets $ — Other assets $ — Other liabilities $ 1,433 Other liabilities $ —
Location and Amounts of Derivative Gains and Losses in Condensed Consolidated Statements of Income	The following table presents information on the location and amounts of derivative gains and losses in the unaudited condensed consolidated statements of income: Amount of Gain or Derivatives Not Designated as Hedging Instruments Location of Gain or (Loss) Recognized in Three months ended June 30, Six months ended Income on Derivative 2015 2014 2015 2014 Commodity contracts Net realized and unrealized loss on fuel price derivatives $ (6,000 ) $ (7,561 ) $ (3,251 ) $ (5,716 ) Foreign currency exchange contracts Net foreign currency (loss) gain $ (5,838 ) $ (1,284 ) 21,967 $ (1,284 )

Fair Value (Tables)

Fair Value (Tables)	6 Months Ended
	Jun. 30, 2015
Fair Value Disclosures [Abstract]
Assets and Liabilities Measured at Fair Value	The following table presents the Company’s assets that are measured at fair value and the related hierarchy levels as of June 30, 2015 : Fair Value Measurements at Reporting Date Using June 30, 2015 Quoted Prices Significant Significant Assets: Mortgage-backed securities $ 665 $ — $ 665 $ — Asset-backed securities 996 — 996 — Municipal bonds 488 — 488 — Equity securities 16,523 16,523 — — Total available-for-sale securities $ 18,672 $ 16,523 $ 2,149 $ — Executive deferred compensation plan trust (a) $ 6,124 $ 6,124 $ — $ — Fuel price derivatives – unleaded fuel (b) $ 10,590 $ — $ 10,590 $ — Fuel price derivatives – diesel (b) 6,078 — — 6,078 Total fuel price derivatives $ 16,668 $ — $ 10,590 $ 6,078 Liabilities: Foreign currency exchange contracts (c) $ 1,433 $ — $ 1,433 $ — (a) The fair value of these instruments is recorded in Other assets. (b) The balance sheet presentation combines unleaded fuel and diesel fuel positions. The following table presents the Company’s assets and liabilities that are measured at fair value and the related hierarchy levels as of December 31, 2014 : Fair Value Measurements at Reporting Date Using December 31, 2014 Quoted Prices Significant Significant Assets: Mortgage-backed securities $ 810 $ — $ 810 $ — Asset-backed securities 1,165 — 1,165 — Municipal bonds 554 — 554 — Equity securities 16,411 16,411 — — Total available-for-sale securities $ 18,940 $ 16,411 $ 2,529 $ — Executive deferred compensation plan trust (a) $ 5,927 $ 5,927 $ — $ — Fuel price derivatives – unleaded fuel (b) $ 29,120 $ — $ 29,120 $ — Fuel price derivatives – diesel (b) 11,849 — — 11,849 Total fuel price derivatives $ 40,969 $ — $ 29,120 $ 11,849 (a) The fair value of these instruments is recorded in Other assets. (b) The balance sheet presentation combines unleaded fuel and diesel fuel positions.
Reconciliation of Beginning and Ending Balances for Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs	The following table presents a reconciliation of the beginning and ending balances for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the three months ended : June 30, 2015 June 30, 2014 Fuel Price Fuel Price Beginning balance $ 10,261 $ (623 ) Total gains and (losses) – realized/unrealized Included in earnings (a) (4,183 ) (1,302 ) Included in other comprehensive income — — Purchases, issuances and settlements — — Transfers (in)/out of Level 3 — — Ending balance $ 6,078 $ (1,925 ) (a) Gains and losses (realized and unrealized) associated with fuel price derivatives, included in earnings for the three months ended June 30, 2015 and 2014 , are reported in net realized and unrealized losses on fuel price derivatives on the unaudited condensed consolidated statements of income. June 30, 2015 June 30, 2014 Fuel Price Fuel Price Beginning balance $ 11,848 $ (2,142 ) Total gains and (losses) – realized/unrealized Included in earnings (a) (5,770 ) 217 Included in other comprehensive income — — Purchases, issuances and settlements — — Transfers (in)/out of Level 3 — — Ending balance $ 6,078 $ (1,925 )
Quantitative Information About Level Three Fair Value Measurements	The significant unobservable inputs used in the fair value measurement of the Company’s diesel fuel price derivative instruments designated as Level 3 as of June 30, 2015 , are as follows: Fair Value Valuation Unobservable Input Range Fuel price derivatives – diesel $ 6,078 Option model Future retail price of diesel fuel after June 30, 2015 $3.72 – 3.86

Accumulated Other Comprehensi35

Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Jun. 30, 2015
Equity [Abstract]
Reconciliation of Accumulated Other Comprehensive Income	2015 2014 Unrealized Gains and Losses on Available- for-Sale Securities Foreign Currency Items Unrealized Gains and Losses on Available- for-Sale Securities Foreign Currency Items Beginning balance $ (129 ) $ (50,452 ) $ (433 ) $ (15,062 ) Other comprehensive (loss) income (49 ) (16,892 ) 226 21,406 Ending balance $ (178 ) $ (67,344 ) $ (207 ) $ 6,344 A reconciliation of accumulated other comprehensive income for the three month periods ended June 30, 2015 and 2014 , is as follows: 2015 2014 Unrealized Gains and Losses on Available- for-Sale Securities Foreign Currency Items Unrealized Gains and Losses on Available- for-Sale Securities Foreign Currency Items Beginning balance $ (38 ) $ (75,135 ) $ (359 ) $ (1,063 ) Other comprehensive (loss) income (140 ) 7,791 152 7,407 Ending balance $ (178 ) $ (67,344 ) $ (207 ) $ 6,344

Non-controlling interests (Tabl

Non-controlling interests (Tables)	6 Months Ended
	Jun. 30, 2015
Noncontrolling Interest [Abstract]
Redeemable Noncontrolling Interest	A reconciliation of redeemable non-controlling interest for the three and six month periods ended June 30, 2015 and June 30, 2014 , is as follows: Three months ended Six months ended 2015 2014 2015 2014 Balance, beginning of period $ 13,647 $ 19,338 $ 16,590 $ 18,729 Net gain (loss) attributable to redeemable non-controlling interest 670 (82 ) 659 (249 ) Currency translation adjustment 675 476 (2,257 ) 1,252 Ending balance $ 14,992 $ 19,732 $ 14,992 $ 19,732
Summary of Noncontrolling Interests	A reconciliation of non-controlling interest for the three and six month periods ended June 30, 2015 and June 30, 2014 is as follows: Three months ended Six months ended 2015 2014 2015 2014 Balance, beginning of period $ 13,644 $ 228 $ 17,396 $ 519 Non-controlling interest investment — 1,033 — 1,033 Net loss attributable to non-controlling interest (762 ) (402 ) (3,063 ) (697 ) Currency translation adjustment 283 — (1,168 ) 4 Ending balance $ 13,165 $ 859 $ 13,165 $ 859

Restructuring Restructuring (Ta

Restructuring Restructuring (Tables)	6 Months Ended
	Jun. 30, 2015
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	The following table presents the Company’s restructuring charges for the six months ended June 30, 2015: Accrual Balance at December 31, 2014 Restructuring Charges Reserve Release Cash Paid Impact of foreign currency translation Accrual Balance at June 30, 2015 2015 Restructuring: Employee separation costs $ — 8,559 — — $ 263 $ 8,822

Segment Information (Tables)

Segment Information (Tables)	6 Months Ended
	Jun. 30, 2015
Segment Reporting [Abstract]
Reportable Segment Results	The following table presents the Company’s reportable segment results on an adjusted pre-tax net income before NCI basis for the three months ended June 30, 2015 and 2014 : Total Revenues Operating Interest Expense Depreciation and Amortization Adjusted Pre-Tax Income before NCI Three months ended June 30, 2015 Fleet payment solutions $ 135,520 $ 421 $ 6,975 $ 49,490 Other payment solutions 78,133 936 1,768 26,426 Total $ 213,653 $ 1,357 $ 8,743 $ 75,916 Three months ended June 30, 2014 Fleet payment solutions $ 145,828 $ 586 $ 6,436 $ 57,621 Other payment solutions 55,753 1,013 410 24,714 Total $ 201,581 $ 1,599 $ 6,846 $ 82,335 The following table presents the Company’s reportable segment results on an adjusted pre-tax net income before NCI basis for the six months ended June 30, 2015 and 2014 : Total Revenues Operating Interest Expense Depreciation and Amortization Adjusted Pre-Tax Income before NCI Six months ended June 30, 2015 Fleet payment solutions $ 264,010 $ 1,161 $ 14,433 $ 94,774 Other payment solutions 151,928 1,775 3,538 52,109 Total $ 415,938 $ 2,936 $ 17,971 $ 146,883 Six months Ended June 30, 2014 Fleet payment solutions $ 281,263 $ 1,110 $ 12,813 $ 105,328 Other payment solutions 102,386 1,777 764 40,920 Total $ 383,649 $ 2,887 $ 13,577 $ 146,248
Reconciliation of Adjusted Net Income to Net Income	The following table reconciles adjusted pre-tax income before NCI to income before income taxes: Three months ended Six months ended 2015 2014 2015 2014 Adjusted pre-tax income before NCI $ 75,916 $ 82,335 $ 146,883 $ 146,248 Unrealized loss on fuel price derivatives (14,956 ) (4,896 ) (24,301 ) (2,073 ) Net foreign currency (loss) gain (2,161 ) 1,238 (6,537 ) 2,271 Amortization of acquired intangible assets (12,016 ) (8,330 ) (24,175 ) (16,617 ) Stock-based compensation (3,942 ) (3,117 ) (7,160 ) (5,540 ) Expenses and adjustments related to acquisitions — (500 ) — (500 ) Restructuring — — (8,559 ) — Gain on divestitures — — 1,215 — Income before income taxes $ 42,841 $ 66,730 $ 77,366 $ 123,789

Basis of Presentation - Additio

Basis of Presentation - Additional Information (Details) - USD ($)	Jun. 30, 2015	Aug. 30, 2012
Unik [Member]
Debt Instrument [Line Items]
Percent of ownership interest acquired	51.00%	51.00%
Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount	$ 400,000,000
Debt instrument, interest rate	4.75%

Business Acquisitions - Additio

Business Acquisitions - Additional Information (Detail)	Jul. 16, 2014USD ($)	Dec. 31, 2014USD ($)	Sep. 30, 2014USD ($)	Dec. 01, 2014USD ($)Country	Jun. 30, 2015USD ($)
ESSO Portfolio [Member]
Business Acquisition [Line Items]
Percent of ownership interest acquired				75.00%
Consideration paid (net of cash acquired)			$ 80,000,000	$ 379,458,000
Number of countries the purchased fleet fuel card program operates | Country				9
Increase (decrease) in goodwill		$ 405,000
Increase (decrease) in accounts receivable		(2,000)
Increase (decrease) in licensing agreements intangible asset		(374,000)
Increase (decrease) in other tangible assets and liabilities, net		345,000
Evolution1 [Member]
Business Acquisition [Line Items]
Consideration paid (net of cash acquired)	$ 532,174,000
Increase (decrease) in goodwill		0
Payments to acquire business, gross	$ 532,174,000
Increase (decrease) in intangible assets		0
Increase (decrease) in deferred income tax liabilities					$ 252
Changes to statements of operations and cash flows					$ 0
Customer Relationships [Member] | ESSO Portfolio [Member]
Business Acquisition [Line Items]
Increase (decrease) in customer relationship intangible asset		$ (374,000)

Business Acquisitions - Summary

Business Acquisitions - Summary of Esso Portfolio Acquisition (Details) - USD ($) $ in Thousands		Dec. 01, 2014	Sep. 30, 2014	Dec. 01, 2014	Jun. 30, 2015	Dec. 31, 2014
Less:
Goodwill					$ 1,089,271	$ 1,117,149
ESSO Portfolio [Member]
Business Acquisition [Line Items]
Consideration paid (net of cash acquired and consideration receivable)			$ 80,000	$ 379,458
Less:
Accounts receivable		$ 303,376		303,376
Other tangible assets and liabilities, net		(8,365)		(8,365)
Goodwill		40,496		40,496
ESSO Portfolio [Member] | Licensing agreements [Member]
Less:
Finite-lived intangible assets	[1]	$ 36,605		36,605
Weighted average life		4 years 7 months 6 days
ESSO Portfolio [Member] | Customer Relationships [Member]
Less:
Finite-lived intangible assets	[2]	$ 7,346		$ 7,346
Weighted average life		7 years 2 months 12 days
[1]	Weighted average life – 4.6 years.
[2]	Weighted average life – 7.2 years.

Business Acquisitions - Summa42

Business Acquisitions - Summary of Evolution1 Acquisition (Details) - USD ($) $ in Thousands		Jul. 16, 2014	Jun. 30, 2015	Dec. 31, 2014
Less:
Recorded goodwill			$ 1,089,271	$ 1,117,149
Evolution1 [Member]
Business Acquisition [Line Items]
Consideration paid (net of cash acquired)		$ 532,174
Less:
Accounts receivable		8,418
Accounts payable		(175)
Deferred tax liabilities, net		(68,768)
Other tangible assets and liabilities, net		(3,712)
Recorded goodwill		296,511
Acquired software and developed technology [Member] | Evolution1 [Member]
Less:
Finite-lived intangible assets	[1]	$ 70,000
Weighted average life		6 years 4 months 24 days
Customer Relationships [Member] | Evolution1 [Member]
Less:
Finite-lived intangible assets	[2]	$ 211,000
Weighted average life		9 years 8 months 12 days
Trademarks and trade names [Member] | Evolution1 [Member]
Less:
Finite-lived intangible assets	[3]	$ 7,900
Indefinite-lived intangible assets	[4]	$ 11,000
Weighted average life		9 years 10 months 24 days
[1]	Weighted average life – 6.4 years.
[2]	Weighted average life – 9.7 years.
[3]	Weighted average life – 9.9 years.
[4]	Indefinite-lived

Business Acquisitions - Pro For

Business Acquisitions - Pro Forma Results of Operations of Evolution1 (Details) - Jun. 30, 2014 - Evolution1 [Member] - USD ($) $ / shares in Units, $ in Thousands	Total	Total
Business Acquisition [Line Items]
Revenue	$ 222,741	$ 428,011
Net income attributable to WEX Inc.	$ 37,180	$ 71,317
Pro forma net income attributable to WEX Inc. per common share:
Net income per share – basic (in usd per share)	$ 0.96	$ 1.83
Net income per share – diluted (in usd per share)	$ 0.95	$ 1.83

Sale of Subsidiary and Assets -

Sale of Subsidiary and Assets - Additional Information (Details) - USD ($) $ in Thousands	Jan. 07, 2015	Jul. 29, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestitures			$ 0	$ 0	$ 1,215	$ 0
Rapid! Paycard [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of subsidiary	$ 20,000
Gain on divestitures	$ 1,215
Pacific Pride [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from sale of subsidiary		$ 49,664
Gain on divestitures		$ 27,490

Sale of Subsidiary and Assets45

Sale of Subsidiary and Assets - Summary of Sale of Pacific Pride LLC (Details) - USD ($) $ in Thousands	Jul. 29, 2014	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestitures		$ 0	$ 0	$ 1,215	$ 0
Pacific Pride [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration received	$ 49,664
Expenses associated with the sale	1,340
Accounts receivable	48,699
Accounts payable	(53,001)
Other tangible assets and liabilities, net	828
Goodwill	19,137
Gain on divestitures	27,490
Pacific Pride [Member] | Customer Relationships [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Intangible assets	3,727
Pacific Pride [Member] | Trademarks and trade names [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Intangible assets	$ 1,444

Reserves for Credit Losses - Ad

Reserves for Credit Losses - Additional Information (Detail) - customer	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Concentration Risk [Line Items]
Trade receivable payments period	30 days
Days past due when receivables are generally written off	150 days
Percentage of trade accounts receivables less than 60 days past due	98.00%	99.00%
Customer Concentration Risk [Member] | Accounts Receivable [Member]
Concentration Risk [Line Items]
Concentration risk, number of customers	0
Concentration risk, percentage	7.00%

Reserves for Credit Losses - Re

Reserves for Credit Losses - Related to Accounts Receivable (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance, beginning of period	$ 13,919	$ 10,396
Provision for credit losses	7,897	15,893
Charge-offs	(15,019)	(17,515)
Recoveries of amounts previously charged-off	2,931	3,644
Currency translation	(63)	119
Balance, end of period	$ 9,665	$ 12,537

Goodwill and Other Intangible48

Goodwill and Other Intangible Assets - Changes In Goodwill (Detail) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Gross goodwill, January 1, 2015	$ 1,134,279
Impact of foreign currency translation	(14,967)
Disposal of certain assets	(12,533)
Gross goodwill, June 30, 2015	1,106,779
Accumulated impairment, June 30, 2015	(17,508)
Net goodwill, June 30, 2015	1,089,271	$ 1,117,149
Fleet Payment Solutions Segment [Member]
Goodwill [Roll Forward]
Gross goodwill, January 1, 2015	759,855
Impact of foreign currency translation	(13,409)
Disposal of certain assets	(147)
Gross goodwill, June 30, 2015	746,299
Accumulated impairment, June 30, 2015	(1,337)
Net goodwill, June 30, 2015	744,962
Other Payment Solutions Segment [Member]
Goodwill [Roll Forward]
Gross goodwill, January 1, 2015	374,424
Impact of foreign currency translation	(1,558)
Disposal of certain assets	(12,386)
Gross goodwill, June 30, 2015	360,480
Accumulated impairment, June 30, 2015	(16,171)
Net goodwill, June 30, 2015	$ 344,309

Goodwill and Other Intangible49

Goodwill and Other Intangible Assets - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2015USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill impairment	$ 0

Goodwill and Other Intangible50

Goodwill and Other Intangible Assets - Changes in Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Definite-lived intangible assets
Net Carrying Amount, January 1, 2015			$ 480,918
Amortization	$ (12,016)	$ (8,330)	(24,175)	$ (16,617)
Net Carrying Amount, June 30, 2015	445,606		445,606
Indefinite-lived intangible assets
Net Carrying Amount, January 1, 2015			497,297
Disposals			(3,216)
Impact of foreign currency translation			(8,179)
Net Carrying Amount, June 30, 2015	461,727		461,727
Trademarks and trade names [Member]
Definite-lived intangible assets
Disposals			0
Indefinite-lived intangible assets
Net Carrying Amount, January 1, 2015			16,379
Impact of foreign currency translation			(258)
Net Carrying Amount, June 30, 2015	16,121		16,121
Acquired software and developed technology [Member]
Definite-lived intangible assets
Net Carrying Amount, January 1, 2015			119,509
Amortization			(5,758)
Disposals			0
Impact of foreign currency translation			(1,597)
Net Carrying Amount, June 30, 2015	112,154		112,154
Customer Relationships [Member]
Definite-lived intangible assets
Net Carrying Amount, January 1, 2015			309,450
Amortization			(15,390)
Disposals			(2,329)
Impact of foreign currency translation			(3,389)
Net Carrying Amount, June 30, 2015	288,342		288,342
Licensing agreements [Member]
Definite-lived intangible assets
Net Carrying Amount, January 1, 2015			35,341
Amortization			(2,128)
Disposals			(164)
Impact of foreign currency translation			(2,934)
Net Carrying Amount, June 30, 2015	30,115		30,115
Patent [Member]
Definite-lived intangible assets
Net Carrying Amount, January 1, 2015			1,245
Amortization			(309)
Disposals			0
Impact of foreign currency translation			117
Net Carrying Amount, June 30, 2015	1,053		1,053
Trade names [Member]
Definite-lived intangible assets
Net Carrying Amount, January 1, 2015			15,373
Amortization			(590)
Disposals			(723)
Impact of foreign currency translation			(118)
Net Carrying Amount, June 30, 2015	$ 13,942		$ 13,942

Goodwill and Other Intangible51

Goodwill and Other Intangible Assets - Estimated Amortization Expense Related to Definite Lived Intangible Assets (Detail) $ in Thousands	Jun. 30, 2015USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
Remaining 2,015	$ 24,190
2,016	47,760
2,017	47,406
2,018	43,946
2,019	40,623
2,020	$ 37,201

Goodwill and Other Intangible52

Goodwill and Other Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Other Intangible Assets [Line Items]
Gross Carrying Amount, Definite-lived intangible assets	$ 583,021	$ 600,609
Accumulated Amortization, Definite-lived intangible assets	(137,415)	(119,691)
Net Carrying Amount, Definite-lived intangible assets	445,606	480,918
Other intangible assets, net	461,727	497,297
Acquired software and developed technology [Member]
Other Intangible Assets [Line Items]
Gross Carrying Amount, Definite-lived intangible assets	148,481	150,458
Accumulated Amortization, Definite-lived intangible assets	(36,327)	(30,949)
Net Carrying Amount, Definite-lived intangible assets	112,154	119,509
Customer Relationships [Member]
Other Intangible Assets [Line Items]
Gross Carrying Amount, Definite-lived intangible assets	382,723	393,942
Accumulated Amortization, Definite-lived intangible assets	(94,381)	(84,492)
Net Carrying Amount, Definite-lived intangible assets	288,342	309,450
Licensing agreements [Member]
Other Intangible Assets [Line Items]
Gross Carrying Amount, Definite-lived intangible assets	32,590	35,726
Accumulated Amortization, Definite-lived intangible assets	(2,475)	(385)
Net Carrying Amount, Definite-lived intangible assets	30,115	35,341
Patent [Member]
Other Intangible Assets [Line Items]
Gross Carrying Amount, Definite-lived intangible assets	2,552	2,697
Accumulated Amortization, Definite-lived intangible assets	(1,499)	(1,452)
Net Carrying Amount, Definite-lived intangible assets	1,053	1,245
Trademarks and trade names [Member]
Other Intangible Assets [Line Items]
Gross Carrying Amount, Definite-lived intangible assets	16,675	17,786
Accumulated Amortization, Definite-lived intangible assets	(2,733)	(2,413)
Net Carrying Amount, Definite-lived intangible assets	13,942	15,373
Net Carrying Amount, Indefinite-lived intangible assets	$ 16,121	$ 16,379

Earnings per Share - Reconcilia

Earnings per Share - Reconciliation of Income and Share Data Used in Basic and Diluted Earnings Per Share Computations (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Net earnings attributable to WEX Inc. available for common stockholders – Basic and Diluted	$ 26,492	$ 43,333	$ 48,837	$ 79,875
Weighted average common shares outstanding – Basic (in shares)	38,739	38,856	38,798	38,911
Unvested restricted stock units (in shares)	43	68	65	96
Stock options (in shares)	17	22	17	24
Weighted average common shares outstanding – Diluted (in shares)	38,799	38,946	38,880	39,031

Derivative Instruments Derivati

Derivative Instruments Derivative Instruments - Fuel Derivate Program (Details) - Price Risk Derivative [Member]	Jun. 30, 2015
Third Quarter 2015 [Member]
Derivative [Line Items]
Fuel price sensitive derivative instrument heading percentage	0.60
Fourth Quarter 2015 [Member]
Derivative [Line Items]
Fuel price sensitive derivative instrument heading percentage	0.40
First Quarter 2016 [Member]
Derivative [Line Items]
Fuel price sensitive derivative instrument heading percentage	0.20
After First Quarter 2016 [Member]
Derivative [Line Items]
Fuel price sensitive derivative instrument heading percentage	0

Derivative Instruments - Put an

Derivative Instruments - Put and Call Option Contracts (Detail) gal in Thousands		6 Months Ended
		Jun. 30, 2015gal
Derivative [Line Items]
Total fuel price derivative instruments, gallons	[1]	23,725
Unleaded Fuel [Member]
Derivative [Line Items]
Total fuel price derivative instruments, gallons	[1]	15,868
Diesel [Member]
Derivative [Line Items]
Total fuel price derivative instruments, gallons	[1]	7,857
[1]	The settlement of the put and call option contracts is based upon the New York Mercantile Exchange’s New York Harbor Reformulated Gasoline Blendstock for Oxygenate Blending and the U.S. Department of Energy’s weekly retail on-highway diesel fuel price for the month.

Derivative Instruments - Put 56

Derivative Instruments - Put and Call Option Contracts (Phantom) (Detail)		6 Months Ended
		Jun. 30, 2015
Minimum [Member] | Unleaded Fuel [Member]
Derivative [Line Items]
Derivative settlement date	[1]	2015-07
Minimum [Member] | Diesel [Member]
Derivative [Line Items]
Derivative settlement date	[1]	2015-07
Maximum [Member] | Unleaded Fuel [Member]
Derivative [Line Items]
Derivative settlement date	[1]	2016-03
Maximum [Member] | Diesel [Member]
Derivative [Line Items]
Derivative settlement date	[1]	2016-03
[1]	The settlement of the put and call option contracts is based upon the New York Mercantile Exchange’s New York Harbor Reformulated Gasoline Blendstock for Oxygenate Blending and the U.S. Department of Energy’s weekly retail on-highway diesel fuel price for the month.

Derivative Instruments - Forwar

Derivative Instruments - Forward and Spot Contracts on Foreign Currency Exchange Contracts (Details) - Jun. 30, 2015 - Foreign Currency Exchange Contract [Member] - Derivatives Not Designated as Hedging Instruments [Member] - USD ($) $ in Thousands	Total
Derivatives, Fair Value [Line Items]
Derivative, Higher Remaining Maturity Range	40 days
Aggregate Notional Amount	$ 383,788

Derivative Instruments - Locati

Derivative Instruments - Location and Amounts of Derivative Fair Values in Condensed Consolidated Balance Sheets (Detail) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Commodity contracts [Member] | Fuel Price Derivatives at Fair Value [Member]
Derivatives, Fair Value [Line Items]
Derivatives Classified as Assets	$ 16,668	$ 40,969
Derivatives Classified as Liabilities	0	0
Foreign Currency Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivatives Classified as Assets	0	0
Derivatives Classified as Liabilities	$ 1,433	$ 0

Derivative Instruments - Loca59

Derivative Instruments - Location and Amounts of Derivative Gains and Losses in Condensed Consolidated Statements of Income (Detail) - Derivatives Not Designated as Hedging Instruments [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Commodity contracts [Member] | Net realized and unrealized gains (losses) on fuel price derivatives [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ (6,000)	$ (7,561)	$ (3,251)	$ (5,716)
Foreign Currency Exchange Contract [Member] | Net unrealized gain (loss) on currency forward contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivative	$ (5,838)	$ (1,284)	$ 21,967	$ (1,284)

Financing and Other Debt - Addi

Financing and Other Debt - Additional Information (Detail) - USD ($)	Apr. 28, 2015	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Lines of credit		$ 720,970,000	$ 720,970,000	$ 901,564,000
Borrowed federal funds		50,500,000	50,500,000	0
Securitization facility		89,176,000	89,176,000	0
Unik [Member]
Debt Instrument [Line Items]
Outstanding debt		$ 6,446,000	$ 6,446,000	$ 7,975,000
Weighted average annual interest rate		13.50%	13.50%	13.90%
2014 Credit Agreement [Member] | Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Lines of credit		$ 248,470,000	$ 248,470,000
Maximum borrowing capacity		700,000,000	$ 700,000,000
2014 Credit Agreement [Member] | Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member] | Interest Rate Option One [Member]
Debt Instrument [Line Items]
Margin on variable rate			2.25%
2014 Credit Agreement [Member] | Revolving Credit Facility [Member] | Prime Rate [Member] | Interest Rate Option One [Member]
Debt Instrument [Line Items]
Margin on variable rate			1.25%
2014 Credit Agreement [Member] | Foreign Line of Credit [Member] | Eurocurrency Rate [Member] | Interest Rate Option Two [Member]
Debt Instrument [Line Items]
Margin on variable rate			2.25%
2014 Credit Agreement [Member] | Credit Facility Term Loans [Member]
Debt Instrument [Line Items]
Lines of credit		472,500,000	$ 472,500,000	$ 486,250,000
2014 Credit Agreement [Member] | Credit Facility Term Loans [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Margin on variable rate			2.25%
Federal Funds Purchased [Member]
Debt Instrument [Line Items]
Increase in federal funds lines of credit		135,000,000
Borrowed federal funds, current borrowing capacity		260,000,000	$ 260,000,000
Borrowed federal funds				125,000,000
Debt Instrument, Interest Rate During Period			0.375%
Loan Participations and Assignments [Member]
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount		45,000,000	$ 45,000,000	$ 45,000,000
Loan Participations and Assignments [Member] | Minimum [Member]
Debt Instrument [Line Items]
Range of daily balance		0	0
Loan Participations and Assignments [Member] | Maximum [Member]
Debt Instrument [Line Items]
Range of daily balance		$ 45,000,000	$ 45,000,000
Loan Participations and Assignments [Member] | London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Margin on variable rate			2.25%
Securitization Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate During Period			2.89%
Term of securitization facility	1 year

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value and Related Hierarchy Levels (Detail) - USD ($) $ in Thousands		Jun. 30, 2015		Dec. 31, 2014
Fair Value Measurements [Line Items]
Total available-for-sale securities		$ 18,672		$ 18,940
Executive deferred compensation plan trust		6,124	[1]	5,927	[2]
Total fuel price derivatives		16,668		40,969
Mortgage-backed securities [Member]
Fair Value Measurements [Line Items]
Total available-for-sale securities		665		810
Asset-backed securities [Member]
Fair Value Measurements [Line Items]
Total available-for-sale securities		996		1,165
Municipal bonds [Member]
Fair Value Measurements [Line Items]
Total available-for-sale securities		488		554
Equity securities [Member]
Fair Value Measurements [Line Items]
Total available-for-sale securities		16,523		16,411
Fuel price derivatives – unleaded fuel [Member]
Fair Value Measurements [Line Items]
Total fuel price derivatives		10,590	[3]	29,120	[4]
Fuel price derivatives – diesel [Member]
Fair Value Measurements [Line Items]
Total fuel price derivatives		6,078	[3]	11,849	[4]
Forward Contracts [Member]
Fair Value Measurements [Line Items]
Foreign currency exchange contracts	[1]	1,433
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Fair Value Measurements [Line Items]
Total available-for-sale securities		16,523		16,411
Executive deferred compensation plan trust		6,124	[1]	5,927	[2]
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] | Equity securities [Member]
Fair Value Measurements [Line Items]
Total available-for-sale securities		16,523		16,411
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Measurements [Line Items]
Total available-for-sale securities		2,149		2,529
Total fuel price derivatives		10,590		29,120
Significant Other Observable Inputs (Level 2) [Member] | Mortgage-backed securities [Member]
Fair Value Measurements [Line Items]
Total available-for-sale securities		665		810
Significant Other Observable Inputs (Level 2) [Member] | Asset-backed securities [Member]
Fair Value Measurements [Line Items]
Total available-for-sale securities		996		1,165
Significant Other Observable Inputs (Level 2) [Member] | Municipal bonds [Member]
Fair Value Measurements [Line Items]
Total available-for-sale securities		488		554
Significant Other Observable Inputs (Level 2) [Member] | Fuel price derivatives – unleaded fuel [Member]
Fair Value Measurements [Line Items]
Total fuel price derivatives		10,590	[3]	29,120	[4]
Significant Other Observable Inputs (Level 3) [Member]
Fair Value Measurements [Line Items]
Total fuel price derivatives		6,078		11,849
Significant Other Observable Inputs (Level 3) [Member] | Fuel price derivatives – diesel [Member]
Fair Value Measurements [Line Items]
Total fuel price derivatives		$ 6,078	[3]	$ 11,849	[4]
[1]	The fair value of these instruments is recorded in Other assets.
[2]	The fair value of these instruments is recorded in Other assets.
[3]	The balance sheet presentation combines unleaded fuel and diesel fuel positions.
[4]	The balance sheet presentation combines unleaded fuel and diesel fuel positions.

Fair Value - Reconciliation of

Fair Value - Reconciliation of Beginning and Ending Balances for Assets (Liabilities) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level Three) (Detail) - Fuel price derivatives – diesel [Member] - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2015		Jun. 30, 2014		Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 10,261		$ (623)		$ 11,848	$ (2,142)
Included in earnings	(4,183)	[1]	(1,302)	[1]	(5,770)	217
Included in other comprehensive income	0		0		0	0
Ending balance	$ 6,078		$ (1,925)		$ 6,078	$ (1,925)
[1]	Gains and losses (realized and unrealized) associated with fuel price derivatives, included in earnings for the three months ended June 30, 2015 and 2014, are reported in net realized and unrealized losses on fuel price derivatives on the unaudited condensed consolidated statements of income.

Fair Value - Additional Informa

Fair Value - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value Disclosures [Abstract]
Notes outstanding, carrying value	$ 400,000	$ 400,000
Notes outstanding, fair value	$ 385,500	$ 388,000

Fair Value - Quantitative Infor

Fair Value - Quantitative Information About Level Three Fair Value Measurements (Detail) - Jun. 30, 2015 - Fuel price derivatives – diesel [Member] $ in Thousands	USD ($)$ / gal
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value | $	$ 6,078
Option Model [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Future retail price of diesel (in dollars per gallon)	3.72
Option Model [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Future retail price of diesel (in dollars per gallon)	3.86

Accumulated Other Comprehensi65

Accumulated Other Comprehensive Income - Reconciliation of Accumulated Other Comprehensive Income (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance			$ (50,581,000)
Ending balance	$ (67,522,000)		(67,522,000)
Unrealized Gains and Losses on Available-for-Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(38,000)	$ (359,000)	(129,000)	$ (433,000)
Other comprehensive (loss) income	(140,000)	152,000	(49,000)	226,000
Ending balance	(178,000)	(207,000)	(178,000)	(207,000)
Reclassified from accumulated other comprehensive income	0	0	0	0
Accumulated other comprehensive income (loss), tax	933,000	364,000	933,000	364,000
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(75,135,000)	(1,063,000)	(50,452,000)	(15,062,000)
Other comprehensive (loss) income	7,791,000	7,407,000	(16,892,000)	21,406,000
Ending balance	$ (67,344,000)	$ 6,344,000	$ (67,344,000)	$ 6,344,000

Non-controlling interests - Add

Non-controlling interests - Additional Information (Details)	Jun. 30, 2015	Aug. 30, 2012
Unik [Member]
Noncontrolling Interest [Line Items]
Percent of ownership interest acquired	51.00%	51.00%
WEX Europe Services [Member]
Noncontrolling Interest [Line Items]
Percent of ownership interest acquired	75.00%

Non-controlling interests - Sch

Non-controlling interests - Schedules of Non-controlling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reconcilliation of Redeemable Noncontrolling Interest [Roll Forward]
Balance, beginning of period	$ 13,647	$ 19,338	$ 16,590	$ 18,729
Net gain (loss) attributable to redeemable non-controlling interest	670	(82)	659	(249)
Currency translation adjustment	675	476	(2,257)	1,252
Ending balance	14,992	19,732	14,992	19,732
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance, beginning of period			17,396
Net loss attributable to non-controlling interest	(92)	(484)	(2,404)	(946)
Ending balance	13,165		13,165
WEX Europe Services [Member]
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance, beginning of period	13,644	228	17,396	519
Non-controlling interest investment	0	1,033	0	1,033
Net loss attributable to non-controlling interest	(762)	(402)	(3,063)	(697)
Currency translation adjustment	283	0	(1,168)	(4)
Ending balance	$ 13,165	$ 859	$ 13,165	$ 859

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Undistributed earnings of certain foreign subsidiaries	$ 11,494	$ 7,733

Restructuring - Additional Info

Restructuring - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring Reserve [Roll Forward]
Restructuring Charges	$ 0	$ 0	$ 8,559,000	$ 0
Cash Paid	0		0
Accrual Balance at March 31, 2015			0
Reserve Release			0
Impact of foreign currency translation			263,000
Accrual Balance at June 30, 2015	$ 8,822,000		$ 8,822,000

Segment Information - Additiona

Segment Information - Additional Information (Detail) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015USD ($)	Jun. 30, 2014USD ($)	Jun. 30, 2015USD ($)Segment	Jun. 30, 2014USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment			2
Revenues	$ 213,653	$ 201,581	$ 415,938	$ 383,649
Evolution1 [Member]
Segment Reporting Information [Line Items]
Revenues			$ 48,860

Segment Information - Reportabl

Segment Information - Reportable Segment Results (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting Disclosure [Line Items]
Total Revenues	$ 213,653	$ 201,581	$ 415,938	$ 383,649
Adjusted Pre-Tax Income before NCI	75,916	82,335	146,883	146,248
Operating Segments [Member]
Segment Reporting Disclosure [Line Items]
Total Revenues	213,653	201,581	415,938	383,649
Operating Interest Expense	1,357	1,599	2,936	2,887
Depreciation and Amortization	8,743	6,846	17,971	13,577
Adjusted Pre-Tax Income before NCI	75,916	82,335	146,883	146,248
Operating Segments [Member] | Fleet payment solutions [Member]
Segment Reporting Disclosure [Line Items]
Total Revenues	135,520	145,828	264,010	281,263
Operating Interest Expense	421	586	1,161	1,110
Depreciation and Amortization	6,975	6,436	14,433	12,813
Adjusted Pre-Tax Income before NCI	49,490	57,621	94,774	105,328
Operating Segments [Member] | Other payment solutions [Member]
Segment Reporting Disclosure [Line Items]
Total Revenues	78,133	55,753	151,928	102,386
Operating Interest Expense	936	1,013	1,775	1,777
Depreciation and Amortization	1,768	410	3,538	764
Adjusted Pre-Tax Income before NCI	$ 26,426	$ 24,714	$ 52,109	$ 40,920

Segment Information - Reconcili

Segment Information - Reconciliation of Adjusted Pre-Tax Income Before NCI to Income Before Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting [Abstract]
Adjusted Pre-Tax Income before NCI	$ 75,916	$ 82,335	$ 146,883	$ 146,248
Unrealized gain (loss) on fuel price derivatives	(14,956)	(4,896)	(24,301)	(2,073)
Net foreign currency (loss) gain	(2,161)	1,238	(6,537)	2,271
Amortization of acquired intangible assets	(12,016)	(8,330)	(24,175)	(16,617)
Stock-based compensation	(3,942)	(3,117)	(7,160)	(5,540)
Expenses and adjustments related to acquisitions	0	(500)	0	(500)
Restructuring	0	0	(8,559)	0
Gain on divestitures	0	0	1,215	0
Income before income taxes	$ 42,841	$ 66,730	$ 77,366	$ 123,789