WEX (WEX) 10-Q 8 Nov 17 2017 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2017	Oct. 31, 2017
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	Sep. 30, 2017
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		42,909,927

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 251,118	$ 190,930
Accounts receivable (net of allowances of $32,712 in 2017 and $20,092 in 2016)	2,595,371	2,054,701
Securitized accounts receivable, restricted	150,845	97,417
Income taxes receivable	12,904	10,765
Available-for-sale securities	23,584	23,525
Property, equipment and capitalized software (net of accumulated depreciation of $264,098 in 2017 and $228,336 in 2016)	185,350	167,278
Deferred income taxes, net	8,462	6,934
Goodwill	1,813,805	1,838,441
Other intangible assets (net of accumulated amortization of $375,004 in 2017 and $254,142 in 2016)	1,155,631	1,265,468
Other assets	344,058	341,638
Total assets	6,541,128	5,997,097
Liabilities and Stockholders’ Equity
Accounts payable	849,326	617,118
Accrued expenses	318,402	331,579
Deposits	1,091,530	1,118,823
Borrowed federal funds	28,462	0
Securitized debt	122,475	84,323
Revolving line of credit facilities and term loans, net	1,727,472	1,599,291
Deferred income taxes, net	149,605	152,906
Notes outstanding, net	396,085	395,534
Other debt	166,264	125,755
Amounts due under tax receivable agreement	38,375	47,302
Other liabilities	20,178	18,719
Total liabilities	4,908,174	4,491,350
Commitments and contingencies
Stockholders’ Equity
Common stock $0.01 par value; 175,000 shares authorized; 47,349 shares issued in 2017 and 47,173 in 2016; 42,921 shares outstanding in 2017 and 42,841 in 2016	473	472
Additional paid-in capital	561,155	547,627
Non-controlling interest	8,446	8,558
Retained earnings	1,324,994	1,244,271
Accumulated other comprehensive loss	(89,772)	(122,839)
Treasury stock at cost; 4,428 shares in 2017 and 2016	(172,342)	(172,342)
Total stockholders’ equity	1,632,954	1,505,747
Total liabilities and stockholders’ equity	$ 6,541,128	$ 5,997,097

CONDENSED CONSOLIDATED BALANCE3

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Accounts receivable, reserve for credit losses	$ 32,712	$ 20,092
Property, equipment and capitalized software, accumulated depreciation	264,098	228,336
Accumulated amortization of intangible assets	$ 375,004	$ 254,142
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	175,000,000	175,000,000
Common stock, shares issued (in shares)	47,349,000	47,173,000
Common stock, shares outstanding (in shares)	42,921,000	42,841,000
Treasury stock, shares (in shares)	4,428,000	4,428,000

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues
Payment processing revenue	$ 145,702	$ 146,182	$ 423,434	$ 383,319
Account servicing revenue	71,322	58,815	198,538	150,770
Finance fee revenue	50,879	36,138	136,336	92,348
Other revenue	56,099	46,621	160,935	101,184
Total revenues	324,002	287,756	919,243	727,621
Expenses
Salary and other personnel	92,321	76,706	261,717	206,778
Restructuring	4,639	2,531	6,799	7,626
Service fees	41,205	53,415	115,306	136,098
Provision for credit losses	19,614	9,489	47,927	19,849
Technology leasing and support	13,628	12,517	40,245	34,525
Occupancy and equipment	6,526	7,271	19,352	19,096
Depreciation and amortization	51,229	46,008	150,428	91,381
Operating interest expense	7,382	2,599	16,694	5,490
Cost of hardware and equipment sold	1,066	859	3,193	2,429
Impairment charge	0	0	16,175	0
Other expenses	22,669	21,793	69,351	57,018
Total operating expenses	260,279	233,188	747,187	580,290
Operating income	63,723	54,568	172,056	147,331
Financing interest expense	(25,754)	(35,064)	(81,449)	(87,040)
Net foreign currency gain	14,611	5,932	33,578	17,233
Net unrealized loss on interest rate swap agreements	(150)	0	(849)	0
Net realized and unrealized gain on fuel price derivatives	0	0	0	711
Non-cash adjustments related to tax receivable agreement	0	(168)	0	(168)
Operating income	52,430	25,268	123,336	78,067
Income taxes	18,570	6,065	43,760	23,730
Net income	33,860	19,203	79,576	54,337
Less: Net loss from non-controlling interest	(111)	(493)	(886)	(1,013)
Net earnings attributable to shareholders	$ 33,971	$ 19,696	$ 80,462	$ 55,350
Net earnings attributable to WEX Inc. per share:
Basic (in dollars per share)	$ 0.79	$ 0.46	$ 1.87	$ 1.38
Diluted (in dollars per share)	$ 0.79	$ 0.46	$ 1.87	$ 1.38
Weighted average common shares outstanding:
Basic (in shares)	43,014	42,788	42,963	40,126
Diluted (in shares)	43,101	42,871	43,092	40,199

CONDENSED CONSOLIDATED STATEME5

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 33,860	$ 19,203	$ 79,576	$ 54,337
Changes in available-for-sale securities, net of tax (benefit) expense of $(10) and $(37) for the three months ended September 30, 2017 and 2016 and $53 and $123 for the nine months ended September 30, 2017 and 2016, respectively	(12)	(62)	97	209
Foreign currency translation	11,042	1,549	33,744	709
Comprehensive income	44,890	20,690	113,417	55,255
Less: Comprehensive gain (loss) attributable to non-controlling interest	122	(438)	(112)	(823)
Comprehensive income attributable to WEX Inc.	$ 44,768	$ 21,128	$ 113,529	$ 56,078

CONDENSED CONSOLIDATED STATEME6

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Changes in available-for-sale securities, tax effect	$ (10)	$ (37)	$ 53	$ 123

CONDENSED CONSOLIDATED STATEME7

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Loss	Treasury Stock	Retained Earnings	Non-Controlling Interest
Beginning Balance (in shares) at Dec. 31, 2015			38,746
Beginning balance at Dec. 31, 2015		$ 1,095,681	$ 431	$ 174,972	$ (103,451)	$ (172,342)	$ 1,183,634	$ 12,437
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued upon exercise of stock options (in shares)			21
Stock issued upon exercise of stock options		283		283
Tax expense from stock option and restricted stock units		(300)		(300)
Stock issued upon vesting of restricted and deferred stock units (in shares)			61
Stock issued upon vesting of restricted and deferred stock units		1	$ 1
Stock-based compensation, net of share repurchases for tax withholdings		12,142		12,142
Changes in available-for-sale securities, net of tax expense		209			209
Stock issued for July 1, 2016 purchase of EFS (in shares)			4,012
Stock issued for July 1, 2016 purchase of EFS		354,953	$ 40	354,913
Foreign currency translation		899			709			190
Net income (loss)		54,337					55,350	(1,013)
Ending Balance (in shares) at Sep. 30, 2016			42,840
Ending balance at Sep. 30, 2016		1,518,205	$ 472	542,010	(102,533)	(172,342)	1,238,984	11,614
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative-effect adjustment	[1]	261					261
Beginning Balance (in shares) at Dec. 31, 2016			42,841
Beginning balance at Dec. 31, 2016		1,505,747	$ 472	547,627	(122,839)	(172,342)	1,244,271	8,558
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued upon exercise of stock options (in shares)			11
Stock issued upon exercise of stock options		595		595
Stock issued upon vesting of restricted and deferred stock units (in shares)			69
Stock issued upon vesting of restricted and deferred stock units		0	$ 1	(1)
Stock-based compensation, net of share repurchases for tax withholdings		12,934		12,934
Changes in available-for-sale securities, net of tax expense		97			97
Foreign currency translation		33,744			32,970			774
Net income (loss)		79,576					80,462	(886)
Ending Balance (in shares) at Sep. 30, 2017			42,921
Ending balance at Sep. 30, 2017		$ 1,632,954	$ 473	$ 561,155	$ (89,772)	$ (172,342)	$ 1,324,994	$ 8,446
[1]	Impact of modified retrospective transition as part of the Company's ASU 2016-09 adoption to recognize previously disallowed excess tax benefits that increased a net operating loss.

CONDENSED CONSOLIDATED STATEME8

CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Statement of Stockholders' Equity [Abstract]
Changes in available-for-sale securities, tax effect	$ 53	$ 123

CONDENSED CONSOLIDATED STATEME9

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net income	$ 79,576	$ 54,337
Adjustments to reconcile net income to net cash provided by (used for) operating activities:
Net unrealized loss (gain)	6,411	(17,402)
Stock-based compensation	22,354	14,312
Depreciation and amortization	150,428	91,381
Ticking fees expensed	0	30,045
Debt restructuring and debt issuance cost amortization	5,935	10,649
Provision for deferred taxes	29,924	15,668
Provision for credit losses	47,927	19,849
Impairment charge	16,175	0
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(595,804)	(405,616)
Other assets	(18,713)	(44,051)
Accounts payable	228,284	169,716
Accrued expenses	(7,740)	1,572
Income taxes	(2,799)	(12,993)
Other liabilities	1,300	(416)
Amounts due under tax receivable agreement	(8,927)	(7,924)
Net cash used for operating activities	(45,669)	(80,873)
Cash flows from investing activities
Purchases of property, equipment and capitalized software	(56,095)	(45,016)
Purchases of available-for-sale securities	(355)	(5,716)
Maturities of available-for-sale securities	445	450
Acquisitions and investment, net of cash	0	(1,089,280)
Net cash used for investing activities	(56,005)	(1,139,562)
Cash flows from financing activities
Excess tax benefits from equity instrument share-based payment arrangements	0	391
Repurchase of share-based awards to satisfy tax withholdings	(9,420)	(2,170)
Proceeds from stock option exercises	595	284
Net change in deposits	(29,052)	415,737
Increase in borrowed federal funds	28,462	0
Net activity on other debt	39,554	56,442
Ticking fees paid	0	(22,171)
Debt issuance costs	(438)	(40,868)
Net change in securitized debt	29,874	(1,696)
Net cash provided by financing activities	177,109	1,472,062
Effect of exchange rate changes on cash and cash equivalents	(15,247)	5,534
Net change in cash and cash equivalents	60,188	257,161
Cash and cash equivalents, beginning of period	190,930	279,989
Cash and cash equivalents, end of period	251,118	537,150
2016 Credit Agreement
Cash flows from financing activities
Proceeds from (repayments of) lines of credit	143,597	96,100
Borrowings on 2016 term loans	0	1,643,000
Repayments on term loans	(26,063)	(8,688)
2014 Credit Agreement
Cash flows from financing activities
Proceeds from (repayments of) lines of credit	0	(205,549)
Repayments on term loans	$ 0	$ (458,750)

Basis of Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	1. Basis of Presentation 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 to 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, 2016 . 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, 2016 , filed with the SEC on March 6, 2017 . 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 nine months ended September 30, 2017 are not necessarily indicative of the results for any future periods or the year ending December 31, 2017 . The Company rounds amounts in the unaudited condensed consolidated financial statements to thousands and calculates all per-share data from underlying whole-dollar amounts. Thus, certain amounts may not recalculate based on reported numbers due to rounding.

New Accounting Standards

New Accounting Standards	9 Months Ended
	Sep. 30, 2017
Accounting Changes and Error Corrections [Abstract]
New Accounting Standards	2. New Accounting Standards Adopted During the Nine Months Ended September 30, 2017 Effective January 1, 2017, the Company adopted ASU 2016-09, which simplifies several aspects of accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, statutory tax withholding requirements, and classification in the statement of cash flows. Prior to the adoption of this guidance, the Company recognized the net excess tax benefits of vested or settled awards in additional paid-in capital. This standard required prospective recognition of all the tax effects related to share-based payments in the income statement. The impact of adoption was recorded as a cumulative effect adjustment to Retained earnings of approximately $300 . For the nine months ended September 30, 2017, the Company recognized approximately $1,600 of excess tax benefits within our income tax provision, which would have been recognized in additional paid-in-capital under previous guidance. For the three months ended September 30, 2017, the amount of excess tax benefits recognized was not material. The Company has elected to prospectively classify these excess tax benefits as cash flows from operating activities effective January 1, 2017. The Company will continue to estimate the number of awards expected to vest, rather than electing to account for forfeitures as they occur. Adoption of this standard has not impacted the Company's minimum statutory tax withholding practices. In May 2017, the FASB issued ASU 2017-09, which clarifies when a change to the terms or conditions of a share-based payment award must be accounted for as a modification. Under the new guidance, an entity will not apply modification accounting to a share-based payment award if there is no change to the award’s fair value, vesting conditions and classification as an equity or liability instrument. The guidance is effective prospectively for all companies for annual periods beginning on or after December 15, 2017. The Company elected to early adopt this ASU and such adoption has not impacted the Company's consolidated financial statements and related disclosures. Not Yet Adopted In May 2014, the FASB issued ASU 2014-09 ("Topic 606"), which will supersede most existing revenue recognition guidance under 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. In addition, the standard requires disclosure of the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The Company will adopt this standard on January 1, 2018. The guidance permits two methods of adoption: full retrospective approach, which requires an entity to restate each prior period that is reported in the financial statements and modified retrospective approach, which requires a cumulative adjustment to retained earnings as of the effective date, without restatement of prior period amounts. The Company will adopt the standard using the modified retrospective method. Topic 606 does not apply to rights or obligations associated with financial instruments (e.g. interest income), including the Company’s finance fee and interest income from banking relationships and cardholders. In addition, fees associated with cardholder arrangements are outside the scope of Topic 606. As a result of further internal analysis, management now estimates approximately 25 percent of consolidated revenues for the period ended December 31, 2016 are outside the scope of Topic 606. The Company’s revenue from discount and interchange, transaction processing and certain fees is within the scope of Topic 606. FASB and its Transition Resource Group have issued clarifications on various aspects of ASU 2014-09. Those clarifications, along with the guidance under Topic 606 support the conclusion that timing and measurement of revenue associated with the Company’s transaction processing services, including discount and interchange and other transaction processing fees, will not be significantly impacted by the new standard. Management estimates approximately 70 percent of consolidated revenues for the period ended December 31, 2016 will remain substantially unchanged under the new standard. Under the new guidance certain costs to obtain a contract, such as sales commissions are to be capitalized and amortized over the life of the contract, with a practical expedient available for contracts under one year in duration. Sales commissions expensed were approximately $20,000 for the year ended December 31, 2016. The Company currently anticipates that the treatment of over 90 percent of commission expenses will remain unchanged and will continue to be expensed. The Company is currently in the process of implementing changes to its accounting policies, business processes and internal controls to support the recognition, measurement and disclosure requirements under the new standard.

Business Acquisition

Business Acquisition	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Business Acquisition	3. Business Acquisition EFS On July 1, 2016, the Company acquired all of the outstanding membership interests of EFS, a provider of customized payment solutions for fleet and corporate customers with a focus on the large and mid-sized over-the-road fleets. The acquisition enabled the Company to expand its customer footprint and to utilize EFS' technology to better serve the needs of all fleet customers. In consideration for the acquisition of EFS, the Company issued 4,012 shares of its common stock valued at approximately $355,000 based on the July 1, 2016 closing price of the Company's common stock on the NYSE. This represented approximately 9.4 percent of the Company's outstanding common stock after giving effect to the issuance of the new shares in connection with this acquisition. The cash consideration for the transaction totaled approximately $1,182,000 , and was funded with amounts received under the 2016 Credit Agreement described further in Note 7 , Financing and Other Debt. The value of the total cash and stock consideration paid for the acquisition of EFS was approximately $1,444,000 , net of $93,000 in cash acquired. The Company obtained information to determine the fair values of certain assets acquired and liabilities assumed throughout the one year measurement period and recorded adjustments to the assets acquired and liabilities assumed, resulting in the recording of other intangible assets and goodwill as described below. Goodwill is calculated as the consideration in excess of net assets recognized and represents the future economic benefits arising from other assets acquired that could not be individually identified and separately recognized, including synergies derived from the acquisition. The tax structure of EFS consists of limited liability companies and corporations. The Company’s tax election will allow a step-up in tax basis related to its 49.5 percent direct ownership in the parent limited liability company. The remaining 50.5 percent ownership in the parent limited liability company is held by another limited liability company, taxed as a corporation, that is part of the EFS structure and will therefore receive carry over tax basis. The difference between book and tax basis resulting from receiving carry over tax basis has been reflected in the financial statements as an investment in partnership deferred tax liability. The Company has determined that approximately $557,000 of the goodwill recognized in this business combination will be deductible for income tax purposes. The following represents the components and final allocation of the purchase price: As Reported December 31, 2016 Measurement Period Adjustments As Reported, Final Total consideration, net of cash acquired $ 1,444,235 $ — $ 1,444,235 Less: Accounts receivable 162,684 — 162,684 Property and equipment 2,387 1 2,388 Customer relationships (a)(b) 842,700 (1,300 ) 841,400 Developed technologies (a)(c) 32,120 — 32,120 Trademarks and trade names (a)(d) 13,700 — 13,700 Deferred income tax assets 34,992 6,352 41,344 Other assets — 739 739 Accounts payable (153,777 ) 248 (153,529 ) Accrued expenses (128,267 ) 9,361 (118,906 ) Deferred income tax liabilities (91,194 ) 28,071 (63,123 ) Recorded goodwill (a) $ 728,890 $ (43,472 ) $ 685,418 (a) $1,235,331 in goodwill and other intangible assets recorded from this business combination were allocated to our Fleet Solutions segment; the remaining $337,307 was allocated to our Travel and Corporate Solutions segment. (b) Weighted average life – 8.1 years . (c) Weighted average life – 2.0 years . (d) Weighted average life – 7.7 years . At September 30, 2017 , estimated amortization expense related to the definite-lived intangible assets listed above for each of the next five fiscal years and thereafter is as follows: Remaining 2017 $ 21,344 2018 $ 80,987 2019 $ 74,548 2020 $ 68,685 2021 $ 60,654 2022 $ 53,537 Thereafter $ 427,408 The pro forma financial information presented below includes the effects of the EFS acquisition as if it had been consummated on January 1, 2015. These pro forma results have been calculated after applying the Company's accounting policies and adjusting results to reflect the intangible amortization and interest expense associated with the 2016 Credit Agreement used to fund the acquisition and related income tax results assuming they were applied and incurred since January 1, 2015. As a result, $11,903 and $18,497 in transaction costs, which are directly attributable to the acquisition, have been excluded from pro forma results for the three and nine months ended September 30, 2016. 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. Accordingly, the following pro forma information is not necessarily indicative of either the future results of operations or results that would have been achieved if the acquisition had taken place at the beginning of 2015. The operations of EFS contributed revenues of approximately $46,957 and $135,578 and net loss before taxes of approximately $8,058 and $28,070 for the three and nine months ended September 30, 2017, respectively, to the Company's unaudited condensed consolidated statements of income. The following represents unaudited pro forma operational results as if the acquisition had occurred January 1, 2015: Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Total revenues $ 287,756 $ 799,039 Net earnings attributable to shareholders $ 27,973 $ 48,584 Net income attributable to shareholders per share: Basic $ 0.65 $ 1.14 Diluted $ 0.65 $ 1.13

Accounts Receivable

Accounts Receivable	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Accounts Receivable	4. Accounts Receivable Payment Terms In general, the Company’s trade receivables provide for payment terms of 30 days or less. Receivables not paid within the terms of the customer agreement are generally subject to late fees based upon the outstanding customer receivable balance. The Company extends revolving credit to certain small fleet customers. These accounts are also subject to late fees and balances that are not paid in full are subject to interest charges based on the revolving balance. The Company had approximately $11,200 and $3,400 in receivables with revolving credit balances as of September 30, 2017 and December 31, 2016 , respectively. Concentration of Credit Risk The receivables portfolio consists of a large group of homogeneous smaller balances from customers across a wide range of industries, which are collectively evaluated for impairment. No one customer constitutes more than 10 percent of the outstanding receivables balance at September 30, 2017 . One customer represented 11 percent of the outstanding receivables balance at December 31, 2016 . The following table presents the delinquency status as a percentage of total trade accounts receivable: September 30, Delinquency Status 2017 2016 Current–29 days past due 95 % 93 % Current–59 days past due 97 % 97 % Reserves for Accounts Receivable Receivables are generally written-off when they are 150 days past due or upon declaration of bankruptcy by the customer. The reserve for credit losses is calculated by an analytic model that also takes into account 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 past due accounts receivable balances, changes in customer payment patterns, known fraudulent activity in the portfolio, as well as leading economic and market indicators. The following table presents changes in reserves for accounts receivable: Nine Months Ended September 30, 2017 2016 Balance, beginning of year $ 20,092 $ 13,832 Provision for credit losses 47,927 19,849 Charges to other accounts 12,221 — Charge-offs (53,044 ) (24,825 ) Recoveries of amounts previously charged-off 5,085 4,980 Currency translation 431 151 Balance, end of period $ 32,712 $ 13,987

Earnings per Share

Earnings per Share	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Earnings per Share	5. Earnings per Share Basic earnings per share is computed by dividing net earnings attributable to shareholders by the weighted average number of shares of common stock and vested deferred stock units outstanding during the year. The computation of diluted earnings per share is similar to the computation of basic earnings per share, except that the denominator is increased for the assumed exercise of dilutive options, the assumed issuance of unvested restricted stock units and deferred stock units, and unvested performance-based restricted stock units for which the performance condition has been met as of the date of determination using the treasury stock method unless the effect is anti-dilutive. The treasury stock method assumes that proceeds, including cash received from the exercise of employee stock options and the total unrecognized compensation expense for unvested share-based compensation awards, would be used to purchase the Company's common stock at the average market price during the period. Prior to the January 2017 adoption of ASU 2016-09, the treasury stock method also included excess tax benefits in its proceeds calculation. The following table summarizes net earnings attributable to shareholders and reconciles basic and diluted shares outstanding used in the earnings per share computations: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Net earnings attributable to shareholders $ 33,971 $ 19,696 $ 80,462 $ 55,350 Weighted average common shares outstanding – Basic 43,014 42,788 42,963 40,126 Dilutive impact of share-based compensation awards 87 83 129 73 Weighted average common shares outstanding – Diluted 43,101 42,871 43,092 40,199 For the three and nine months ended September 30, 2017 and September 30, 2016 , an immaterial number of outstanding share-based awards were excluded from the computation of diluted earnings per share because the effect of including these awards would be anti-dilutive.

Derivative Instruments

Derivative Instruments	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	6. Derivative Instruments The Company is exposed to certain market risks relating to its ongoing business operations. From time to time, the Company enters into derivative instrument arrangements to manage various risks including interest rate risk, foreign exchange risk and commodity price risk. None of these derivative instruments qualify for hedge accounting treatment. Interest Rate Swap Agreements In November 2016 , the Company entered into three forward-fixed interest rate swap agreements to manage the interest rate risk associated with the Company's outstanding variable-interest rate borrowings. Under these swap agreements, the Company receives variable interest of 1-month LIBOR and pays fixed rates between 0.896% to 1.125% , reducing the variability of the future interest payments associated with a portion of the Company's borrowings. The terms of the interest rate swap agreements are as follows: Tranche A Tranche B Tranche C Notional amount at inception $400,000 $150,000 $250,000 Amortization 5% annually N/A N/A Maturity date December 31, 2020 December 31, 2020 December 31, 2018 Fixed interest rate 1.108% 1.125% 0.896% See Note 9 , Fair Value for more information regarding the valuation of the Company's interest rate swaps. Foreign Currency Exchange Program The Company utilizes a limited foreign currency exchange hedging program, entering into short-term foreign currency swaps to convert the foreign currency exposures of certain foreign currency denominated intercompany loans and investments to the base currency. The Company will continue to monitor its foreign currency exposure for discrete items and may, from time to time, hedge certain foreign currency transactions. The following table summarizes the contracts related to foreign currency swaps, which settle in the base currency at various dates within 5 days after quarter-end: Aggregate Notional Amount September 30, 2017 2016 Australian dollar A$ 10,000 A$ 10,000 The amount of gains and losses associated with these foreign currency swaps were not material for the three and nine months ended September 30, 2017 and September 30, 2016 . Fuel Derivatives Program In prior years, the Company entered into put and call option contracts related to the Company’s commodity price risk. These put and call option contracts, or fuel price derivative instruments, were 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. During the first quarter of 2016, the Company held fuel price sensitive derivative instruments to hedge approximately 20 percent of its anticipated U.S. fuel-price related earnings exposure based on assumptions at time of purchase and all of these positions were settled as of March 31, 2016. The Company is no longer hedged for changes in fuel prices. Management will continue to monitor the fuel price market and evaluate its alternatives as it relates to this hedging program. Consolidated Derivative Instruments The following table presents information on the location and fair value of asset derivatives recorded in the unaudited condensed consolidated balance sheets: Derivatives Not Designated as Hedging Instruments Balance Sheet Location September 30, 2017 December 31, 2016 Interest rate swaps Other assets $ 12,059 $ 12,908 Given that the Company's commodity contracts and interest rate swap agreements are not designated as hedging instruments, changes in the fair value of these instruments, which represent unrealized gains and losses, are recognized in the unaudited condensed consolidated statements of income. The following table presents information on the amounts of derivative gains and losses and the locations in the unaudited condensed consolidated statements of income: Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) on Derivatives Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Commodity contracts Net realized and unrealized gain on fuel price derivatives $ — $ — $ — $ 711 Interest rate swap agreements - unrealized portion Net unrealized loss on interest rate swap agreements $ (150 ) $ — $ (849 ) $ — Interest rate swap agreements - realized portion Financing interest income (expense) $ 377 $ — $ (243 ) $ —

Financing and Other Debt

Financing and Other Debt	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Financing and Other Debt	7. Financing and Other Debt 2016 Credit Agreement On July 1, 2016 , the Company entered into the 2016 Credit Agreement, which replaced the 2014 Credit Agreement. The 2016 Credit Agreement provides for term loan facilities and a secured revolving credit facility, with a sublimit for letters of credit and swingline loans. Under this agreement, $925,000 matures on July 1, 2021 and $1,200,000 matures on July 1, 2023. Prior to maturity, amounts under the credit facility will be reduced by mandatory payments. Additional loans may be made available under the 2016 Credit Agreement upon request of the Company subject to specified terms and conditions, including receipt of lender commitments. Proceeds from the 2016 Credit Agreement may be used for working capital purposes, acquisitions, payment of dividends and other restricted payments, refinancing of indebtedness and other general corporate purposes. As of September 30, 2017 , the Company had $149,423 of borrowings against its $470,000 secured revolving credit facility, or approximately $320,000 of availability under the 2016 Credit Agreement, subject to the covenants as described below. The outstanding amortizing term loans under the 2016 Credit Agreement totaled $1,611,563 at September 30, 2017 . As of September 30, 2017 and December 31, 2016 , amounts outstanding under the 2016 Credit Agreement bore a weighted average effective interest rate of 3.9 percent and 4.2 percent , respectively. As of both September 30, 2017 and December 31, 2016 , the Company has posted approximately $13,000 in letters of credit as collateral for lease agreements and virtual card and fuel payment processing activity at its foreign subsidiaries. Effective July 3, 2017, the Company repriced the secured term loans under the 2016 Credit Agreement (the "2016 First Amendment"), which reduced the applicable interest rate margin at current borrowing levels for both LIBOR borrowings and base rate borrowings for the Company's tranche A term loans and tranche B term loans. The applicable interest rate margin for the tranche A term loans will continue to be determined based on the Company's consolidated leverage ratio, with the interest rate margin initially set at 2.75% for LIBOR borrowings, and 1.75% for base rate borrowings. The applicable interest rate margin for the tranche B term loans will no longer be determined based on the Company's consolidated leverage ratio and will instead be set at 2.75% for LIBOR borrowings, and 1.75% for base rate borrowings. The consolidated leverage ratio as defined in the 2016 Credit Agreement (i.e. consolidated funded indebtedness less up to $350,000 in permitted securitization transactions of the Company and its subsidiaries to consolidated EBITDA) was also modified for purposes of calculating the interest rate margin for tranche A term loans and revolving loans and determining compliance with the financial covenant by allowing the Company to exclude up to $75 million of certain corporate cash balances for purposes of determining consolidated funded indebtedness. After giving effect to the terms of the 2016 First Amendment, amounts outstanding under the 2016 Credit Agreement were repriced to bear interest at a rate equal to, at the Company’s option, (a) the Eurocurrency Rate, as defined in the 2016 Credit Agreement, plus a margin of between 1.75% to 3.25% ( 2.75% at September 30, 2017 ) with respect to the revolving credit facility, between 1.75% to 2.75% ( 2.25% at September 30, 2017 ) with respect to the tranche A term loan facility, which represents a reduction of 50 basis points and 2.75% with respect to the tranche B term loan facility, which represents a reduction of 75 basis points (with the Eurocurrency Rate subject to a 0.0% floor), in each case, based on the consolidated leverage ratio or (b) the highest of (i) the Federal Funds Rate plus 0.50% , (ii) the prime rate announced by Bank of America, and (iii) the Eurocurrency Rate plus 1.00% , in each case plus a margin of 0.75% to 2.25% ( 1.75% at September 30, 2017 ) with respect to the revolving credit facility, 0.75% to 1.75% ( 1.25% at September 30, 2017 ) with respect to the tranche A term loan facility and 1.75% with respect to the tranche B term loan facility, with the margin determined in the case of the revolving credit facility and the tranche A term loan facility based on the consolidated leverage ratio. In November 2016, the Company entered into three interest rate swap agreements to manage the interest rate risk associated with its outstanding variable-interest rate borrowings under the 2016 Credit Agreement. See Note 6 , Derivative Instruments, for further discussion. In addition, the Company has agreed to pay a quarterly commitment fee at a rate per annum ranging from 0.30% to 0.50% ( 0.45% at September 30, 2017 ) based on the consolidated leverage ratio of the daily unused portion of the 2016 Credit Agreement. The tranche B term loan facility was issued with an original issue discount of 1.00% . As the debt repricings under the 2016 First Amendment were not considered substantially different, the Company applied modification accounting and no gain or loss was recognized as a result of the debt modification. Amounts paid as part of this repricing were not material. On October 30, 2017, the Company added $100,000 of capacity under our secured revolving credit facility. See Note 16, Subsequent Event, for further discussion. Debt Covenants As more fully described in the Company's Annual Report on Form 10-K for the year ended December 31, 2016 , the 2016 Credit Agreement and the Indenture contain covenants that limit the Company's and its subsidiaries' ability to (i) incur additional debt, (ii) pay dividends or make other distributions on, redeem or repurchase capital stock, or make investments or other restricted payments, (iii) enter into transactions with affiliates, (iv) dispose of assets or issue stock of restricted subsidiaries or regulated subsidiaries, (v) create liens on assets, or (vi) effect a consolidation or merger or sell all, or substantially all, of the Company’s assets. As of September 30, 2017 , the Company was in compliance with all material covenants of its 2016 Credit Agreement and the Indenture. Borrowed Federal Funds WEX Bank borrows from lines of credit on a federal funds rate basis to supplement the financing of its accounts receivable. The Company's federal funds available lines of credit were $246,500 and $250,000 , with approximately $28,500 and $0 outstanding as of September 30, 2017 and December 31, 2016 , respectively. Other Debt WEX Brazil Debt WEX Brazil had debt of approximately $11,743 and $30,755 as of September 30, 2017 and December 31, 2016 , respectively. This was comprised of credit facilities and loan arrangements related to its accounts receivable, with various maturity dates. The interest rate was 21.4 percent and 19.7 percent as of September 30, 2017 and December 31, 2016 , respectively. This debt is recorded in Other debt on the Company’s unaudited condensed consolidated balance sheets for the periods presented. Participation Debt WEX Bank maintains agreements with third-party banks to fund customer balances that exceed WEX Bank's lending limit to an individual customer. During the nine months ended September 30, 2017, the Company increased the funding capacity by $90,000 to $185,000 . Associated borrowings carry a variable interest rate of 1 month to 3 month LIBOR plus a margin of 225 basis points. The balance of the debt was approximately $154,521 and $95,000 at September 30, 2017 and December 31, 2016 , respectively, and was secured by an interest in the underlying customer receivables. The balance will fluctuate on a daily basis based on customer funding needs. The balance will mature in amounts of $85,000 and $50,000 on May 30, 2018 and December 31, 2021, respectively, with the remaining $19,521 maturing on demand. This debt is recorded in Other debt on the Company’s unaudited condensed consolidated balance sheets for the periods presented. WEX Brazil Securitization Facility During the second quarter of 2017, WEX Brazil entered into a securitized debt agreement to sell certain unsecured receivables associated with our salary payment card product to an investment fund managed by an unrelated third-party financial institution. Under the terms of the agreement, the investment fund's purchase price incorporates a discount relative to the face value of the transferred receivables. Additionally, the investment fund compensates WEX Brazil for continuing to service these receivables through their duration, which on average is less than six months. This securitization arrangement does not meet the derecognition conditions and accordingly WEX Brazil continues to report the transferred receivables in our unaudited condensed consolidated balance sheet with no change in the basis of accounting. Additionally, we recognize the cash proceeds received from the investment fund and record offsetting securitized debt in our unaudited condensed consolidated balance sheet. During the third quarter of 2017, WEX Brazil transferred approximately $31,200 of receivables to the investment fund for cash proceeds of approximately $27,700 . This $3,500 discount is recognized as operating interest in the Company's unaudited condensed consolidated statements of income using the effective interest method over the weighted average term of the salary advances. The Company received approximately $2,000 of servicing fee income upon the sale of these receivables, which is recognized as other revenue in our unaudited condensed consolidated statements of income on a straight-line basis over the anticipated loan servicing period. As of September 30, 2017, the Company recognized approximately $20,000 of both transferred receivables and securitized debt on our unaudited condensed consolidated balance sheet. Australian Securitization Facility During the second quarter of 2017, the Company extended an existing securitized debt agreement with the Bank of Tokyo-Mitsubishi UFJ, Ltd through April 2018. Under the terms of the agreement, each month, on a revolving basis, the Company sells certain of its Australian receivables to the Company's Australian Securitization Subsidiary. The Australian 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 was 2.70 percent and 2.65 percent as of September 30, 2017 and December 31, 2016 , respectively. The Company had $83,100 and $78,600 of securitized debt under this facility as of September 30, 2017 and December 31, 2016 , respectively. European Securitization Facility On April 7, 2016, the Company entered into a five year securitized debt agreement with the Bank of Tokyo-Mitsubishi UFJ, Ltd. Under the terms of the agreement, the Company sells certain of its receivables from selected European countries to its European Securitization Subsidiary. The European Securitization Subsidiary, in turn, uses the receivables as collateral to issue securitized debt. The amount collected on the securitized receivables is restricted to pay the securitized debt and is not available for general corporate purposes. The amounts of receivables to be securitized under this agreement will be determined by management on a monthly basis. The interest rate was 0.42 percent and 0.95 percent as of September 30, 2017 and December 31, 2016 , respectively. The Company had $18,800 and $5,700 of securitized debt under this facility as of September 30, 2017 and December 31, 2016 , respectively. Debt Issuance Costs The following table presents the Company's net debt issuance costs related to its revolving line-of-credit facilities, term loans and notes outstanding: September 30, 2017 December 31, 2016 Revolving line of credit facility and term loans $ 33,514 $ 38,334 Notes outstanding 1 $ 3,915 $ 4,466 1 See Note 9 , Fair Value for more information regarding the Company's Notes outstanding.

Fair Value

Fair Value	9 Months Ended
	Sep. 30, 2017
Fair Value Disclosures [Abstract]
Fair Value	9. Fair Value The Company holds mortgage-backed securities, fixed-income securities, derivatives (see Note 6 , Derivative Instruments) and certain other financial instruments that 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. Various factors are considered in determining the fair value of the Company’s obligations, 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. Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. We did not have any transfers between Level 1 and Level 2 of the fair value hierarchy during either of the three or nine months ended September 30, 2017 or September 30, 2016 . The following table presents the Company’s assets that are measured at fair value and the related hierarchy levels: Fair Value Hierarchy September 30, 2017 December 31, 2016 Assets Municipal bonds 2 $ 534 $ 682 Asset-backed securities 2 395 648 Mortgage-backed securities 2 450 490 Fixed-income mutual fund 1 22,205 21,705 Available-for-sale securities $ 23,584 $ 23,525 Executive deferred compensation plan trust (a) 1 $ 6,517 $ 5,673 Interest rate swaps (a) 2 $ 12,059 $ 12,908 (a) The fair value of these instruments is recorded in Other assets. Available-For-Sale Securities When available, the Company uses quoted market prices to determine the fair value of available-for-sale securities; such inputs are classified as Level 1 of the fair-value hierarchy. These securities primarily consist of an open-ended mutual fund which is invested in fixed-income securities and is held in order to satisfy the regulatory requirements of WEX Bank. For mortgage-backed and asset-backed debt securities and municipal 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 valued using Level 2 inputs. Executive Deferred Compensation Plan Trust 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. Interest Rate Swaps The Company determines the fair value of its interest rate swaps based on the discounted cash flows of the difference between the projected fixed payments on the swaps and the implied floating payments using the current LIBOR curve, which are Level 2 inputs of the fair value hierarchy. $400 Million Notes Outstanding On January 30, 2013, the Company completed a $400,000 offering in an aggregate principal amount of 4.750 percent senior notes due February 1, 2023, with interest payable semiannually. The Notes outstanding have a fair value of $411,500 and $390,000 as of September 30, 2017 and December 31, 2016 , respectively. The fair value is based on market rates for the issuance of our debt. The Company determined the fair value of its Notes outstanding is classified as Level 2 in the fair value hierarchy. Debt The Company determines the fair value of the amount outstanding under its 2016 Credit Agreement based on the market rates for the issuance of the Company's debt, which are Level 2 inputs in the fair value hierarchy. As of both September 30, 2017 and December 31, 2016 , the carrying value of the 2016 Credit Agreement approximated its fair value.

Off-Balance Sheet Arrangements

Off-Balance Sheet Arrangements	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Off-Balance Sheet Arrangements	8. Off-Balance Sheet Arrangements WEX Europe Services Accounts Receivable Factoring During the first quarter of 2017 , WEX Europe Services ("WES") entered into a factoring arrangement with an unrelated third-party financial institution (the "Purchasing Bank") to sell certain of its accounts receivable in order to accelerate the collection of the Company's cash and reduce internal costs, thereby improving liquidity. Under this arrangement, the Purchasing Bank establishes a credit limit for each customer account. The factored receivables are without recourse to the extent that the customer balances are maintained at or below the established credit limit. For customer receivable balances in excess of the Purchasing Bank's credit limit, the Company maintains the risk of default. We obtained a true sale opinion from an independent attorney, which states that the factoring agreement creates a sale of receivables under local law for amounts transferred both below and above the established credit limits. Additionally, there are no indications of the Company's continuing involvement in the factored receivables. As a result, the Purchasing Bank is deemed the purchaser of these receivables and is entitled to enforce payment of these amounts from the debtor. This factoring arrangement is accounted for as a sale and accordingly the Company records the receivables sold as a reduction of accounts receivable and proceeds as cash provided by operating activities. The Company sold approximately $170,000 and $394,000 of receivables under this arrangement during the three and nine months ended September 30, 2017 , respectively. Proceeds received are recorded net of applicable expenses, interest and commissions. This resulted in a loss on factoring of $1,150 and $2,600 for the three and nine months ended September 30, 2017 , respectively, which was recorded in Other expenses in the unaudited condensed consolidated statement of income. As of September 30, 2017 , the Company had associated factoring receivables of approximately $54,000 , of which approximately $3,600 were in excess of the established credit limit. Charge-backs on balances in excess of the credit limit during the three and nine months ended September 30, 2017 were insignificant. Brazil Accounts Receivable Factoring During the first quarter of 2017 , WEX Brazil entered into a factoring agreement to sell certain unsecured receivables associated with our salary payment card product, without recourse, to an unrelated third-party financial institution. Under the terms of the agreement, the Company retains no rights or interest and has no obligations with respect to the receivables. As such, the factoring under this arrangement is accounted for as a sale. The Company sold $16,300 of receivables during the nine months ended September 30, 2017. This resulted in a loss on factoring of $800 for the nine months ended September 30, 2017 , which was recorded in Other expenses in the unaudited condensed consolidated statement of income. There were no sales under this factoring arrangement during the three months ended September 30, 2017; a recently executed securitization agreement has replaced this factoring arrangement as Brazil's primary funding mechanism. See Note 7, Financing and Other Debt, for more information on this securitization arrangement. The receivables sold under this agreement were recorded as a reduction of accounts receivable and proceeds as cash provided by operating activities.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	10. Income Taxes The Company's effective tax rate was 35.4 percent for the third quarter of 2017 as compared to 24.0 percent in the same period last year. The increase in our effective tax rate was primarily due to the absence of several discrete tax benefits including a decrease in valuation allowance recorded during the third quarter of 2016 . The Company's effective tax rate was 35.5 percent for the first nine months of 2017 as compared to 30.4 percent in the same period last year. The increase in our effective tax rate was primarily due to the absence of tax benefits recorded during the first nine months of 2016. These unfavorable factors were partly offset by the $1,600 tax effect of excess tax benefits related to share-based payments recorded in the income statement in the first nine months of 2017. See Note 2, New Accounting Standards for more information. Undistributed earnings of certain foreign subsidiaries of the Company amounted to $45,981 and $25,824 at September 30, 2017 and December 31, 2016 , respectively. 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	9 Months Ended
	Sep. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	11. Commitments and Contingencies Litigation On August 11, 2016, the Company was sued in the Circuit Court of St. Charles County, Missouri, in a putative class action alleging the Company improperly sent unauthorized facsimile advertisements in violation of the Telephone Consumer Protection Act, 47 U.S.C. § 227 (the “TCPA”). The named plaintiff seeks to represent a nationwide class of recipients of unauthorized facsimile advertisements from the Company (collectively, the "Plaintiffs") and requests statutory damages for each facsimile advertisement. The Plaintiffs further allege that the opt-out notice of the faxes did not meet the criteria set forth in the TCPA or its underlying regulations. The Company removed the case to the United States District Court for the Eastern District of Missouri on September 15, 2016. On October 14, 2016, the Company filed an answer denying liability and stating the facsimile advertisement at issue was sent by FleetOne, LLC, the Company’s wholly-owned subsidiary. On May 10, 2017, the parties agreed to a settlement in principle to resolve the class claims, which was preliminarily approved by the court on October 6, 2017. The expected settlement amount is not material to the Company's unaudited condensed consolidated financial position, results of operations, cash flows or liquidity. The Company is involved in other 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 unaudited condensed consolidated financial position, results of operations or cash flows. Commitments Significant commitments and contingencies as of September 30, 2017 are consistent with those discussed in Note 18, Commitments and Contingencies to the consolidated financial statements in the Annual Report on Form 10-K for the year ended December 31, 2016 .

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	12. Stock-Based Compensation The fair value of restricted stock units, deferred stock units, performance-based restricted stock units, performance-based stock options and service-based stock options awarded during the three and nine months ended September 30, 2017 totaled $400 and $45,741 , respectively, as compared to $4,416 and $30,343 for the three and nine months ended September 30, 2016 , respectively. Stock Options Performance-Based Stock Options In May 2017, the Company granted performance-based stock options with a contractual term of ten years to members of senior management. The options contain a market condition that begins operating on the third anniversary of the grant date, requiring the closing price of the Company's stock to meet or exceed certain price thresholds for twenty consecutive trading days (“Stock Price Hurdle”) in order for shares to vest. In addition, award recipients must be continually employed from the grant date until such date that the Stock Price Hurdle is satisfied in order for shares to vest. To the extent both the service condition and the Stock Price Hurdle are not met by the end of a defined measurement period, these performance-based stock options will be canceled. The grant date fair value of these performance options was estimated on the date of the grant using a Monte-Carlo simulation model used to simulate a distribution of future stock price paths based on historical volatility levels. The table below summarizes the assumptions used to calculate the fair value: Exercise price $ 99.69 Expected stock price volatility 31.14 % Risk-free interest rate 2.18 % Weighted average fair value of performance options granted $ 28.69 These performance-based stock options are expensed on a graded basis over the derived service period of approximately three years regardless of whether the market condition is satisfied. Upon satisfaction of a Stock Price Hurdle, any unrecognized compensation expense for that specific tranche will be accelerated. Service-Based Stock Options On March 20, 2017, the Company approved the grant of stock options to certain officers and employees under the 2010 Equity Incentive Plan. Stock options granted generally become exercisable over three years (with approximately 33 percent of the total grant vesting each year on the anniversary of the grant date) and expire 10 years from the date of grant. The fair value of each option award is estimated on the grant date using a Black-Scholes-Merton option-pricing model and the following assumptions: March 20, 2017 Weighted average expected life (in years) 6.0 Weighted average exercise price $ 104.95 Weighted average volatility 30.67 % Weighted average risk-free rate 2.13 % Weighted average fair value $ 35.58

Impairment and Restructuring Ac

Impairment and Restructuring Activities	9 Months Ended
	Sep. 30, 2017
Restructuring and Related Activities [Abstract]
Impairment and Restructuring Activities	13. Impairment and Restructuring Activities Impairment During the nine months ended September 30, 2017, the Company executed a vendor contract amendment based on a strategic decision to in-source certain previously outsourced technology functions. As a result of this action, the Company determined that $16,175 of prepaid services had no future benefit and were therefore written off within the Fleet Solutions segment during the nine months ended September 30, 2017. Restructuring In the first quarter of 2015, the Company commenced a restructuring initiative (the "2015 Restructuring Initiative") as a result of its global review of operations. The global review of operations identified certain initiatives to further streamline the business, to 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 Company continued its efforts to improve its overall operational efficiency and began a second restructuring initiative (the "2016 Restructuring Initiative") during the second quarter of 2016. In connection with the EFS acquisition, the Company initiated a restructuring program in the third quarter of 2016 (the "Acquisition Integration Restructuring Initiative"). The restructuring expenses related to these initiatives primarily consist of employee costs and office closure costs directly associated with the respective program. The Company has determined the amount of expenses related to these initiatives is probable and reasonably estimable. As such, the Company has recorded the impact on the unaudited condensed consolidated statements of income and in Accrued expenses on the unaudited condensed consolidated balance sheets. Restructuring charges incurred to date under these initiatives were $25,689 as of September 30, 2017 . The balances under the 2015 Restructuring Initiative and the Acquisition Integration Restructuring Initiative are expected to be paid through 2018. Amounts under the 2016 Restructuring Initiative are expected to be paid through 2017. Based on current plans, which are subject to change, the amount of restructuring costs that the Company expects to incur is immaterial. The following table presents the Company's 2015 Restructuring Initiative liability: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balance, beginning of period $ 3,008 $ 7,085 $ 5,231 $ 7,249 Restructuring charges 1 431 446 1,964 2,035 Cash paid (656 ) (638 ) (3,492 ) (2,763 ) Liability transfer to 2016 Restructuring Initiative — — (1,158 ) — Impact of foreign currency translation (22 ) 701 216 1,073 Balance, end of period $ 2,761 $ 7,594 $ 2,761 $ 7,594 1 Primarily consists of employee costs. The following table presents the Company’s 2016 Restructuring Initiative liability: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balance, beginning of period $ 4,342 $ 3,488 $ 3,662 $ — Restructuring charges 1 88 — 307 3,506 Reserve release — — (533 ) — Cash paid (1,778 ) (4 ) (2,265 ) (4 ) Liability transfer from 2015 Restructuring Initiative — — 1,158 — Impact of foreign currency translation 35 264 358 246 Balance, end of period $ 2,687 $ 3,748 $ 2,687 $ 3,748 1 Primarily consists of employee costs. The following table presents the Company’s Acquisition Integration Restructuring Initiative liability: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balance, beginning of period $ 1,333 $ — $ 1,764 $ — Restructuring charges 1 4,120 2,085 5,061 2,085 Cash paid (937 ) (421 ) (2,416 ) (421 ) Other — — 107 — Balance, end of period $ 4,516 $ 1,664 $ 4,516 $ 1,664 1 Primarily consists of office closure costs. The following table presents the Company's total restructuring liability: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balance, beginning of period $ 8,683 $ 10,573 $ 10,657 $ 7,249 Restructuring charges 4,639 2,531 7,332 7,626 Reserve release — — (533 ) — Cash paid (3,371 ) (1,063 ) (8,173 ) (3,188 ) Other — — 107 — Impact of foreign currency translation 13 965 574 1,319 Balance, end of period $ 9,964 $ 13,006 $ 9,964 $ 13,006

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Segment Information	14. Segment Information Operating segments are defined as components of an enterprise about which separate financial information is available and is evaluated regularly by the chief operating decision maker ("CODM") in deciding how to allocate resources and assess performance. The Company’s CODM is its Chief Executive Officer. The operating segments are aggregated into the three reportable segments described below. • Fleet Solutions provides customers with payment and transaction processing services specifically designed for the needs of commercial and government fleets. This segment also provides information management services to these fleet customers. • Travel and Corporate Solutions focuses on the complex payment environment of business-to-business payments, providing customers with payment processing solutions for their corporate payment and transaction monitoring needs. • Health and Employee Benefit Solutions provides healthcare payment products and SaaS consumer directed platforms, as well as payroll related benefits to customers. During the third quarter of 2017, the Company revised its operating segment measurement from pre-tax adjusted income to adjusted operating income. The Company no longer allocates financing interest expense to our operating segments as management believes this item can obscure underlying business trends. As such, we believe adjusted operating income reflects a more enhanced measurement of segment profitability. Segment results for the three and nine months ended September 30, 2016 have been revised to reflect this change in operating segment measurement. Adjusted operating income adjusts operating income to exclude: (i) acquisition and divestiture related items (including acquisition-related intangible amortization); (ii) stock-based compensation; (iii) restructuring and other costs; and (iv) debt restructuring costs. In addition, for the nine months ended September 30, 2017, adjusted operating income excludes an impairment charge related to the insourcing of certain technology functions from a third party. The following tables present the Company’s reportable segment results on an adjusted operating income basis: Fleet Solutions Travel and Corporate Solutions Health and Employee Benefit Solutions Total Three Months Ended September 30, 2017 Payment processing revenue $ 90,270 $ 44,177 $ 11,255 $ 145,702 Account servicing revenue 44,858 206 26,258 71,322 Finance fee revenue 40,773 87 10,019 50,879 Other revenue 36,177 16,556 3,366 56,099 Total revenues $ 212,078 $ 61,026 $ 50,898 $ 324,002 Depreciation and amortization $ 37,172 $ 3,185 $ 10,872 $ 51,229 Adjusted operating income $ 74,782 $ 33,971 $ 11,509 $ 120,262 Three Months Ended September 30, 2016 Payment processing revenue $ 83,132 $ 52,551 $ 10,499 $ 146,182 Account servicing revenue 37,414 242 21,159 58,815 Finance fee revenue 33,230 115 2,793 36,138 Other revenue 30,982 10,407 5,232 46,621 Total revenues $ 184,758 $ 63,315 $ 39,683 $ 287,756 Depreciation and amortization $ 35,172 $ 1,630 $ 9,206 $ 46,008 Adjusted operating income $ 68,987 $ 31,449 $ 10,053 $ 110,489 Fleet Solutions Travel and Corporate Solutions Health and Employee Benefit Solutions Total Nine Months Ended September 30, 2017 Payment processing revenue $ 264,210 $ 119,328 $ 39,896 $ 423,434 Account servicing revenue 122,238 528 75,772 198,538 Finance fee revenue 113,754 469 22,113 136,336 Other revenue 103,003 43,414 14,518 160,935 Total revenues $ 603,205 $ 163,739 $ 152,299 $ 919,243 Depreciation and amortization $ 109,610 $ 9,445 $ 31,373 $ 150,428 Adjusted operating income $ 214,421 $ 84,935 $ 41,897 $ 341,253 Nine Months Ended September 30, 2016 Payment processing revenue $ 216,133 $ 130,372 $ 36,814 $ 383,319 Account servicing revenue 90,400 852 59,518 150,770 Finance fee revenue 85,841 336 6,171 92,348 Other revenue 57,417 30,235 13,532 101,184 Total revenues $ 449,791 $ 161,795 $ 116,035 $ 727,621 Depreciation and amortization $ 62,927 $ 3,007 $ 25,447 $ 91,381 Adjusted operating income $ 145,009 $ 74,639 $ 32,444 $ 252,092 Our segments earn interest income both from banking relationships and from cardholders. The majority of interest income from cardholders is earned on our salary payment cards offered in Brazil. The following table presents the Company's interest income by segment: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Fleet Solutions $ 944 $ 961 $ 2,764 $ 2,547 Travel and Corporate Solutions 208 143 569 330 Health and Employee Benefit Solutions 10,899 2,794 23,253 6,176 Total interest income $ 12,051 $ 3,898 $ 26,586 $ 9,053 The following table reconciles adjusted operating income to income before income taxes: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Fleet Solutions $ 74,782 $ 68,987 $ 214,421 $ 145,009 Travel and Corporate Solutions 33,971 31,449 84,935 74,639 Health and Employee Benefit Solutions 11,509 10,053 41,897 32,444 Adjusted operating income $ 120,262 $ 110,489 $ 341,253 $ 252,092 Acquisition-related intangible amortization (38,510 ) (33,855 ) (114,603 ) (59,066 ) Other acquisition and divestiture related items (1,006 ) (13,100 ) (3,380 ) (19,694 ) Stock-based compensation (8,483 ) (5,199 ) (22,354 ) (14,312 ) Restructuring and other costs (6,024 ) (3,767 ) (10,169 ) (11,689 ) Impairment charge — — (16,175 ) — Debt restructuring (2,516 ) — (2,516 ) — Operating income $ 63,723 $ 54,568 $ 172,056 $ 147,331 Financing interest expense (25,754 ) (35,064 ) (81,449 ) (87,040 ) Net foreign currency gain 14,611 5,932 33,578 17,233 Net unrealized loss on interest rate swap agreements (150 ) — (849 ) — Net realized and unrealized gain on fuel price derivatives — — — 711 Non-cash adjustments related to tax receivable agreement — (168 ) — (168 ) Income before income taxes $ 52,430 $ 25,268 $ 123,336 $ 78,067

Supplementary Regulatory Capita

Supplementary Regulatory Capital Disclosure	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Supplementary Regulatory Capital Disclosure	15. Supplementary Regulatory Capital Disclosure The Company's subsidiary, WEX Bank, is subject to various regulatory capital requirements administered by the FDIC and the Utah Department of Financial Institutions. Failure to meet minimum capital requirements can initiate certain mandatory and discretionary actions by regulators that, if undertaken, could have a direct material effect on the Company’s financial statements. Under capital adequacy guidelines and the regulatory framework for prompt corrective action, WEX Bank must meet specific capital guidelines that involve quantitative measures of WEX Bank’s assets, liabilities and certain off-balance sheet items as calculated under regulatory accounting practices. WEX Bank’s capital amounts and classification are also subject to qualitative judgments by the regulators about components, risk weightings and other factors. Quantitative measures established by regulation to ensure capital adequacy require WEX Bank to maintain minimum amounts and ratios as defined in the regulations. As of December 31, 2016 , the most recent FDIC exam report categorized WEX Bank as “well capitalized” under the regulatory framework for prompt corrective action. There are no conditions or events subsequent to that examination report that management believes have changed WEX Bank’s capital rating. WEX Bank’s actual and regulatory minimum capital amounts and ratios are presented in the following table: Actual Amount Ratio Minimum for Capital Adequacy Purposes Amount Ratio Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio September 30, 2017 Total Capital to risk-weighted assets $ 326,773 13.12 % $ 199,249 8.0 % $ 249,061 10.0 % Tier 1 Capital to average assets $ 314,473 12.09 % $ 104,004 4.0 % $ 130,004 5.0 % Common equity to risk-weighted assets $ 314,473 12.63 % $ 112,078 4.5 % $ 161,890 6.5 % Tier 1 Capital to risk-weighted assets $ 314,473 12.63 % $ 149,437 6.0 % $ 199,250 8.0 % December 31, 2016 Total Capital to risk-weighted assets $ 228,402 12.59 % $ 145,182 8.0 % $ 181,477 10.0 % Tier 1 Capital to average assets $ 214,847 11.10 % $ 77,413 4.0 % $ 96,767 5.0 % Common equity to risk-weighted assets $ 214,847 11.84 % $ 81,665 4.5 % $ 117,961 6.5 % Tier 1 Capital to risk-weighted assets $ 214,847 11.84 % $ 108,887 6.0 % $ 145,183 8.0 %

Subsequent Event

Subsequent Event	9 Months Ended
	Sep. 30, 2017
Subsequent Events [Abstract]
Subsequent Event	16. Subsequent Event Effective O ctober 18, 2017 , the Company acquired certain assets and assumed certain liabilities of AOC Solutions and one of its affiliate companies, 3Delta Systems, Inc. (collectively "AOC"), an industry leader in commercial payments technology, for a net purchase price of $112,500 . The acquisition was funded with cash on hand and through the Company's 2016 Credit Agreement. In conjunction with the closing of the AOC acquisition, effective October 30, 2017, the Company added $100,000 of capacity to its revolving line of credit to provide additional liquidity and flexibility. The acquisition of AOC, a longstanding technology provider for our virtual card product, will broaden the Company's capabilities, increase our pool of employees with payments platform expertise and allow the Company to evolve with the needs of its customers and partners through the use of AOC’s payments processing technology platforms. This acquisition will be accounted for under the acquisition method of accounting.

New Accounting Standards (Polic

New Accounting Standards (Policies)	9 Months Ended
	Sep. 30, 2017
Accounting Changes and Error Corrections [Abstract]
Basis of Presentation	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 to 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, 2016 . 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, 2016 , filed with the SEC on March 6, 2017 . 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 nine months ended September 30, 2017 are not necessarily indicative of the results for any future periods or the year ending December 31, 2017 . The Company rounds amounts in the unaudited condensed consolidated financial statements to thousands and calculates all per-share data from underlying whole-dollar amounts. Thus, certain amounts may not recalculate based on reported numbers due to rounding.
New Accounting Standards	Adopted During the Nine Months Ended September 30, 2017 Effective January 1, 2017, the Company adopted ASU 2016-09, which simplifies several aspects of accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, statutory tax withholding requirements, and classification in the statement of cash flows. Prior to the adoption of this guidance, the Company recognized the net excess tax benefits of vested or settled awards in additional paid-in capital. This standard required prospective recognition of all the tax effects related to share-based payments in the income statement. The impact of adoption was recorded as a cumulative effect adjustment to Retained earnings of approximately $300 . For the nine months ended September 30, 2017, the Company recognized approximately $1,600 of excess tax benefits within our income tax provision, which would have been recognized in additional paid-in-capital under previous guidance. For the three months ended September 30, 2017, the amount of excess tax benefits recognized was not material. The Company has elected to prospectively classify these excess tax benefits as cash flows from operating activities effective January 1, 2017. The Company will continue to estimate the number of awards expected to vest, rather than electing to account for forfeitures as they occur. Adoption of this standard has not impacted the Company's minimum statutory tax withholding practices. In May 2017, the FASB issued ASU 2017-09, which clarifies when a change to the terms or conditions of a share-based payment award must be accounted for as a modification. Under the new guidance, an entity will not apply modification accounting to a share-based payment award if there is no change to the award’s fair value, vesting conditions and classification as an equity or liability instrument. The guidance is effective prospectively for all companies for annual periods beginning on or after December 15, 2017. The Company elected to early adopt this ASU and such adoption has not impacted the Company's consolidated financial statements and related disclosures. Not Yet Adopted In May 2014, the FASB issued ASU 2014-09 ("Topic 606"), which will supersede most existing revenue recognition guidance under 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. In addition, the standard requires disclosure of the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. The Company will adopt this standard on January 1, 2018. The guidance permits two methods of adoption: full retrospective approach, which requires an entity to restate each prior period that is reported in the financial statements and modified retrospective approach, which requires a cumulative adjustment to retained earnings as of the effective date, without restatement of prior period amounts. The Company will adopt the standard using the modified retrospective method. Topic 606 does not apply to rights or obligations associated with financial instruments (e.g. interest income), including the Company’s finance fee and interest income from banking relationships and cardholders. In addition, fees associated with cardholder arrangements are outside the scope of Topic 606. As a result of further internal analysis, management now estimates approximately 25 percent of consolidated revenues for the period ended December 31, 2016 are outside the scope of Topic 606. The Company’s revenue from discount and interchange, transaction processing and certain fees is within the scope of Topic 606. FASB and its Transition Resource Group have issued clarifications on various aspects of ASU 2014-09. Those clarifications, along with the guidance under Topic 606 support the conclusion that timing and measurement of revenue associated with the Company’s transaction processing services, including discount and interchange and other transaction processing fees, will not be significantly impacted by the new standard. Management estimates approximately 70 percent of consolidated revenues for the period ended December 31, 2016 will remain substantially unchanged under the new standard. Under the new guidance certain costs to obtain a contract, such as sales commissions are to be capitalized and amortized over the life of the contract, with a practical expedient available for contracts under one year in duration. Sales commissions expensed were approximately $20,000 for the year ended December 31, 2016. The Company currently anticipates that the treatment of over 90 percent of commission expenses will remain unchanged and will continue to be expensed. The Company is currently in the process of implementing changes to its accounting policies, business processes and internal controls to support the recognition, measurement and disclosure requirements under the new standard.
Receivables	Payment Terms In general, the Company’s trade receivables provide for payment terms of 30 days or less. Receivables not paid within the terms of the customer agreement are generally subject to late fees based upon the outstanding customer receivable balance. The Company extends revolving credit to certain small fleet customers. These accounts are also subject to late fees and balances that are not paid in full are subject to interest charges based on the revolving balance.
Earnings per Share	Basic earnings per share is computed by dividing net earnings attributable to shareholders by the weighted average number of shares of common stock and vested deferred stock units outstanding during the year. The computation of diluted earnings per share is similar to the computation of basic earnings per share, except that the denominator is increased for the assumed exercise of dilutive options, the assumed issuance of unvested restricted stock units and deferred stock units, and unvested performance-based restricted stock units for which the performance condition has been met as of the date of determination using the treasury stock method unless the effect is anti-dilutive. The treasury stock method assumes that proceeds, including cash received from the exercise of employee stock options and the total unrecognized compensation expense for unvested share-based compensation awards, would be used to purchase the Company's common stock at the average market price during the period. Prior to the January 2017 adoption of ASU 2016-09, the treasury stock method also included excess tax benefits in its proceeds calculation.
Derivative Instruments	The Company is exposed to certain market risks relating to its ongoing business operations. From time to time, the Company enters into derivative instrument arrangements to manage various risks including interest rate risk, foreign exchange risk and commodity price risk. None of these derivative instruments qualify for hedge accounting treatment.
Fair Value of Financial Instruments	The fair value is based on market rates for the issuance of our debt. The Company determined the fair value of its Notes outstanding is classified as Level 2 in the fair value hierarchy. Available-For-Sale Securities When available, the Company uses quoted market prices to determine the fair value of available-for-sale securities; such inputs are classified as Level 1 of the fair-value hierarchy. These securities primarily consist of an open-ended mutual fund which is invested in fixed-income securities and is held in order to satisfy the regulatory requirements of WEX Bank. For mortgage-backed and asset-backed debt securities and municipal 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 valued using Level 2 inputs. Executive Deferred Compensation Plan Trust 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. Interest Rate Swaps The Company determines the fair value of its interest rate swaps based on the discounted cash flows of the difference between the projected fixed payments on the swaps and the implied floating payments using the current LIBOR curve, which are Level 2 inputs of the fair value hierarchy. Debt The Company determines the fair value of the amount outstanding under its 2016 Credit Agreement based on the market rates for the issuance of the Company's debt, which are Level 2 inputs in the fair value hierarchy. The Company holds mortgage-backed securities, fixed-income securities, derivatives (see Note 6 , Derivative Instruments) and certain other financial instruments that 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. Various factors are considered in determining the fair value of the Company’s obligations, 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. Assets and liabilities measured at fair value are classified in their entirety based on the lowest level of input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability. We did not have any transfers between Level 1 and Level 2 of the fair value hierarchy during either of the three or nine months ended September 30, 2017 or September 30, 2016 .
Segment Information	Operating segments are defined as components of an enterprise about which separate financial information is available and is evaluated regularly by the chief operating decision maker ("CODM") in deciding how to allocate resources and assess performance. The Company’s CODM is its Chief Executive Officer. The operating segments are aggregated into the three reportable segments described below. • Fleet Solutions provides customers with payment and transaction processing services specifically designed for the needs of commercial and government fleets. This segment also provides information management services to these fleet customers. • Travel and Corporate Solutions focuses on the complex payment environment of business-to-business payments, providing customers with payment processing solutions for their corporate payment and transaction monitoring needs. • Health and Employee Benefit Solutions provides healthcare payment products and SaaS consumer directed platforms, as well as payroll related benefits to customers. During the third quarter of 2017, the Company revised its operating segment measurement from pre-tax adjusted income to adjusted operating income. The Company no longer allocates financing interest expense to our operating segments as management believes this item can obscure underlying business trends. As such, we believe adjusted operating income reflects a more enhanced measurement of segment profitability. Segment results for the three and nine months ended September 30, 2016 have been revised to reflect this change in operating segment measurement. Adjusted operating income adjusts operating income to exclude: (i) acquisition and divestiture related items (including acquisition-related intangible amortization); (ii) stock-based compensation; (iii) restructuring and other costs; and (iv) debt restructuring costs. In addition, for the nine months ended September 30, 2017, adjusted operating income excludes an impairment charge related to the insourcing of certain technology functions from a third party.

Business Acquisition (Tables)

Business Acquisition (Tables)	9 Months Ended
	Sep. 30, 2017
Business Combinations [Abstract]
Schedule of Business Acquisitions	The following represents the components and final allocation of the purchase price: As Reported December 31, 2016 Measurement Period Adjustments As Reported, Final Total consideration, net of cash acquired $ 1,444,235 $ — $ 1,444,235 Less: Accounts receivable 162,684 — 162,684 Property and equipment 2,387 1 2,388 Customer relationships (a)(b) 842,700 (1,300 ) 841,400 Developed technologies (a)(c) 32,120 — 32,120 Trademarks and trade names (a)(d) 13,700 — 13,700 Deferred income tax assets 34,992 6,352 41,344 Other assets — 739 739 Accounts payable (153,777 ) 248 (153,529 ) Accrued expenses (128,267 ) 9,361 (118,906 ) Deferred income tax liabilities (91,194 ) 28,071 (63,123 ) Recorded goodwill (a) $ 728,890 $ (43,472 ) $ 685,418 (a) $1,235,331 in goodwill and other intangible assets recorded from this business combination were allocated to our Fleet Solutions segment; the remaining $337,307 was allocated to our Travel and Corporate Solutions segment. (b) Weighted average life – 8.1 years . (c) Weighted average life – 2.0 years . (d) Weighted average life – 7.7 years .
Estimated Amortization Expense Related to Definite Lived Intangible Assets	At September 30, 2017 , estimated amortization expense related to the definite-lived intangible assets listed above for each of the next five fiscal years and thereafter is as follows: Remaining 2017 $ 21,344 2018 $ 80,987 2019 $ 74,548 2020 $ 68,685 2021 $ 60,654 2022 $ 53,537 Thereafter $ 427,408
Business Acquisition, Pro Forma Information	The following represents unaudited pro forma operational results as if the acquisition had occurred January 1, 2015: Three Months Ended September 30, 2016 Nine Months Ended September 30, 2016 Total revenues $ 287,756 $ 799,039 Net earnings attributable to shareholders $ 27,973 $ 48,584 Net income attributable to shareholders per share: Basic $ 0.65 $ 1.14 Diluted $ 0.65 $ 1.13

Accounts Receivable (Tables)

Accounts Receivable (Tables)	9 Months Ended
	Sep. 30, 2017
Receivables [Abstract]
Past Due Financing Receivables	The following table presents the delinquency status as a percentage of total trade accounts receivable: September 30, Delinquency Status 2017 2016 Current–29 days past due 95 % 93 % Current–59 days past due 97 % 97 %
Changes in Reserves for Credit Losses Related to Accounts Receivable	The following table presents changes in reserves for accounts receivable: Nine Months Ended September 30, 2017 2016 Balance, beginning of year $ 20,092 $ 13,832 Provision for credit losses 47,927 19,849 Charges to other accounts 12,221 — Charge-offs (53,044 ) (24,825 ) Recoveries of amounts previously charged-off 5,085 4,980 Currency translation 431 151 Balance, end of period $ 32,712 $ 13,987

Earnings per Share (Tables)

Earnings per Share (Tables)	9 Months Ended
	Sep. 30, 2017
Earnings Per Share [Abstract]
Reconciliation of Income and Share Data Used in Basic and Diluted Earnings Per Share Computations	The following table summarizes net earnings attributable to shareholders and reconciles basic and diluted shares outstanding used in the earnings per share computations: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Net earnings attributable to shareholders $ 33,971 $ 19,696 $ 80,462 $ 55,350 Weighted average common shares outstanding – Basic 43,014 42,788 42,963 40,126 Dilutive impact of share-based compensation awards 87 83 129 73 Weighted average common shares outstanding – Diluted 43,101 42,871 43,092 40,199

Derivative Instruments (Tables)

Derivative Instruments (Tables)	9 Months Ended
	Sep. 30, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts of Outstanding Derivative Positions	The terms of the interest rate swap agreements are as follows: Tranche A Tranche B Tranche C Notional amount at inception $400,000 $150,000 $250,000 Amortization 5% annually N/A N/A Maturity date December 31, 2020 December 31, 2020 December 31, 2018 Fixed interest rate 1.108% 1.125% 0.896% The following table summarizes the contracts related to foreign currency swaps, which settle in the base currency at various dates within 5 days after quarter-end: Aggregate Notional Amount September 30, 2017 2016 Australian dollar A$ 10,000 A$ 10,000
Location and Amounts of Derivative Fair Values in Condensed Consolidated Balance Sheets	The following table presents information on the location and fair value of asset derivatives recorded in the unaudited condensed consolidated balance sheets: Derivatives Not Designated as Hedging Instruments Balance Sheet Location September 30, 2017 December 31, 2016 Interest rate swaps Other assets $ 12,059 $ 12,908
Location and Amounts of Derivative Gains and Losses in Condensed Consolidated Statements of Income	The following table presents information on the amounts of derivative gains and losses and the locations in the unaudited condensed consolidated statements of income: Derivatives Not Designated as Hedging Instruments Location of Gain (Loss) on Derivatives Recognized in Income Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Commodity contracts Net realized and unrealized gain on fuel price derivatives $ — $ — $ — $ 711 Interest rate swap agreements - unrealized portion Net unrealized loss on interest rate swap agreements $ (150 ) $ — $ (849 ) $ — Interest rate swap agreements - realized portion Financing interest income (expense) $ 377 $ — $ (243 ) $ —

Financing and Other Debt (Table

Financing and Other Debt (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Schedule of Debt Issuance Costs	The following table presents the Company's net debt issuance costs related to its revolving line-of-credit facilities, term loans and notes outstanding: September 30, 2017 December 31, 2016 Revolving line of credit facility and term loans $ 33,514 $ 38,334 Notes outstanding 1 $ 3,915 $ 4,466 1 See Note 9 , Fair Value for more information regarding the Company's Notes outstanding.

Fair Value (Tables)

Fair Value (Tables)	9 Months Ended
	Sep. 30, 2017
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: Fair Value Hierarchy September 30, 2017 December 31, 2016 Assets Municipal bonds 2 $ 534 $ 682 Asset-backed securities 2 395 648 Mortgage-backed securities 2 450 490 Fixed-income mutual fund 1 22,205 21,705 Available-for-sale securities $ 23,584 $ 23,525 Executive deferred compensation plan trust (a) 1 $ 6,517 $ 5,673 Interest rate swaps (a) 2 $ 12,059 $ 12,908 (a) The fair value of these instruments is recorded in Other assets.

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Assumptions Used	The table below summarizes the assumptions used to calculate the fair value: Exercise price $ 99.69 Expected stock price volatility 31.14 % Risk-free interest rate 2.18 % Weighted average fair value of performance options granted $ 28.69 The fair value of each option award is estimated on the grant date using a Black-Scholes-Merton option-pricing model and the following assumptions: March 20, 2017 Weighted average expected life (in years) 6.0 Weighted average exercise price $ 104.95 Weighted average volatility 30.67 % Weighted average risk-free rate 2.13 % Weighted average fair value $ 35.58

Impairment and Restructuring 34

Impairment and Restructuring Activities (Tables)	9 Months Ended
	Sep. 30, 2017
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	The following table presents the Company's 2015 Restructuring Initiative liability: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balance, beginning of period $ 3,008 $ 7,085 $ 5,231 $ 7,249 Restructuring charges 1 431 446 1,964 2,035 Cash paid (656 ) (638 ) (3,492 ) (2,763 ) Liability transfer to 2016 Restructuring Initiative — — (1,158 ) — Impact of foreign currency translation (22 ) 701 216 1,073 Balance, end of period $ 2,761 $ 7,594 $ 2,761 $ 7,594 1 Primarily consists of employee costs. The following table presents the Company’s 2016 Restructuring Initiative liability: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balance, beginning of period $ 4,342 $ 3,488 $ 3,662 $ — Restructuring charges 1 88 — 307 3,506 Reserve release — — (533 ) — Cash paid (1,778 ) (4 ) (2,265 ) (4 ) Liability transfer from 2015 Restructuring Initiative — — 1,158 — Impact of foreign currency translation 35 264 358 246 Balance, end of period $ 2,687 $ 3,748 $ 2,687 $ 3,748 1 Primarily consists of employee costs. The following table presents the Company’s Acquisition Integration Restructuring Initiative liability: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balance, beginning of period $ 1,333 $ — $ 1,764 $ — Restructuring charges 1 4,120 2,085 5,061 2,085 Cash paid (937 ) (421 ) (2,416 ) (421 ) Other — — 107 — Balance, end of period $ 4,516 $ 1,664 $ 4,516 $ 1,664 1 Primarily consists of office closure costs. The following table presents the Company's total restructuring liability: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Balance, beginning of period $ 8,683 $ 10,573 $ 10,657 $ 7,249 Restructuring charges 4,639 2,531 7,332 7,626 Reserve release — — (533 ) — Cash paid (3,371 ) (1,063 ) (8,173 ) (3,188 ) Other — — 107 — Impact of foreign currency translation 13 965 574 1,319 Balance, end of period $ 9,964 $ 13,006 $ 9,964 $ 13,006

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2017
Segment Reporting [Abstract]
Reportable Segment Results	The following tables present the Company’s reportable segment results on an adjusted operating income basis: Fleet Solutions Travel and Corporate Solutions Health and Employee Benefit Solutions Total Three Months Ended September 30, 2017 Payment processing revenue $ 90,270 $ 44,177 $ 11,255 $ 145,702 Account servicing revenue 44,858 206 26,258 71,322 Finance fee revenue 40,773 87 10,019 50,879 Other revenue 36,177 16,556 3,366 56,099 Total revenues $ 212,078 $ 61,026 $ 50,898 $ 324,002 Depreciation and amortization $ 37,172 $ 3,185 $ 10,872 $ 51,229 Adjusted operating income $ 74,782 $ 33,971 $ 11,509 $ 120,262 Three Months Ended September 30, 2016 Payment processing revenue $ 83,132 $ 52,551 $ 10,499 $ 146,182 Account servicing revenue 37,414 242 21,159 58,815 Finance fee revenue 33,230 115 2,793 36,138 Other revenue 30,982 10,407 5,232 46,621 Total revenues $ 184,758 $ 63,315 $ 39,683 $ 287,756 Depreciation and amortization $ 35,172 $ 1,630 $ 9,206 $ 46,008 Adjusted operating income $ 68,987 $ 31,449 $ 10,053 $ 110,489 Fleet Solutions Travel and Corporate Solutions Health and Employee Benefit Solutions Total Nine Months Ended September 30, 2017 Payment processing revenue $ 264,210 $ 119,328 $ 39,896 $ 423,434 Account servicing revenue 122,238 528 75,772 198,538 Finance fee revenue 113,754 469 22,113 136,336 Other revenue 103,003 43,414 14,518 160,935 Total revenues $ 603,205 $ 163,739 $ 152,299 $ 919,243 Depreciation and amortization $ 109,610 $ 9,445 $ 31,373 $ 150,428 Adjusted operating income $ 214,421 $ 84,935 $ 41,897 $ 341,253 Nine Months Ended September 30, 2016 Payment processing revenue $ 216,133 $ 130,372 $ 36,814 $ 383,319 Account servicing revenue 90,400 852 59,518 150,770 Finance fee revenue 85,841 336 6,171 92,348 Other revenue 57,417 30,235 13,532 101,184 Total revenues $ 449,791 $ 161,795 $ 116,035 $ 727,621 Depreciation and amortization $ 62,927 $ 3,007 $ 25,447 $ 91,381 Adjusted operating income $ 145,009 $ 74,639 $ 32,444 $ 252,092
Interest Income	The following table presents the Company's interest income by segment: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Fleet Solutions $ 944 $ 961 $ 2,764 $ 2,547 Travel and Corporate Solutions 208 143 569 330 Health and Employee Benefit Solutions 10,899 2,794 23,253 6,176 Total interest income $ 12,051 $ 3,898 $ 26,586 $ 9,053
Reconciliation of Adjusted Net Income to Income Before Income Taxes	The following table reconciles adjusted operating income to income before income taxes: Three Months Ended September 30, Nine Months Ended September 30, 2017 2016 2017 2016 Fleet Solutions $ 74,782 $ 68,987 $ 214,421 $ 145,009 Travel and Corporate Solutions 33,971 31,449 84,935 74,639 Health and Employee Benefit Solutions 11,509 10,053 41,897 32,444 Adjusted operating income $ 120,262 $ 110,489 $ 341,253 $ 252,092 Acquisition-related intangible amortization (38,510 ) (33,855 ) (114,603 ) (59,066 ) Other acquisition and divestiture related items (1,006 ) (13,100 ) (3,380 ) (19,694 ) Stock-based compensation (8,483 ) (5,199 ) (22,354 ) (14,312 ) Restructuring and other costs (6,024 ) (3,767 ) (10,169 ) (11,689 ) Impairment charge — — (16,175 ) — Debt restructuring (2,516 ) — (2,516 ) — Operating income $ 63,723 $ 54,568 $ 172,056 $ 147,331 Financing interest expense (25,754 ) (35,064 ) (81,449 ) (87,040 ) Net foreign currency gain 14,611 5,932 33,578 17,233 Net unrealized loss on interest rate swap agreements (150 ) — (849 ) — Net realized and unrealized gain on fuel price derivatives — — — 711 Non-cash adjustments related to tax receivable agreement — (168 ) — (168 ) Income before income taxes $ 52,430 $ 25,268 $ 123,336 $ 78,067

Supplementary Regulatory Capi36

Supplementary Regulatory Capital Disclosure (Tables)	9 Months Ended
	Sep. 30, 2017
Debt Disclosure [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	WEX Bank’s actual and regulatory minimum capital amounts and ratios are presented in the following table: Actual Amount Ratio Minimum for Capital Adequacy Purposes Amount Ratio Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount Ratio September 30, 2017 Total Capital to risk-weighted assets $ 326,773 13.12 % $ 199,249 8.0 % $ 249,061 10.0 % Tier 1 Capital to average assets $ 314,473 12.09 % $ 104,004 4.0 % $ 130,004 5.0 % Common equity to risk-weighted assets $ 314,473 12.63 % $ 112,078 4.5 % $ 161,890 6.5 % Tier 1 Capital to risk-weighted assets $ 314,473 12.63 % $ 149,437 6.0 % $ 199,250 8.0 % December 31, 2016 Total Capital to risk-weighted assets $ 228,402 12.59 % $ 145,182 8.0 % $ 181,477 10.0 % Tier 1 Capital to average assets $ 214,847 11.10 % $ 77,413 4.0 % $ 96,767 5.0 % Common equity to risk-weighted assets $ 214,847 11.84 % $ 81,665 4.5 % $ 117,961 6.5 % Tier 1 Capital to risk-weighted assets $ 214,847 11.84 % $ 108,887 6.0 % $ 145,183 8.0 %

New Accounting Standards (Detai

New Accounting Standards (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended	12 Months Ended
		Sep. 30, 2017	Sep. 30, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment	[1]			$ 261
Excess tax benefits recognized			$ 1,600
Sales commissions				$ 20,000
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Excess tax benefits recognized		$ 0	$ 1,600
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Percentage of consolidated revenue not affected by new accounting pronouncement			25.00%
Percentage of consolidated revenue affected by new accounting pronouncement				70.00%
Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment	[1]			$ 261
Retained Earnings | Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative-effect adjustment				$ 300
[1]	Impact of modified retrospective transition as part of the Company's ASU 2016-09 adoption to recognize previously disallowed excess tax benefits that increased a net operating loss.

Business Acquisition Summary of

Business Acquisition Summary of EFS Acquisition (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 01, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Allocation of the purchase price by the assets and liabilities acquired
Measurement period adjustments, deferred income tax liabilities				$ 28,071
Goodwill		$ 1,813,805		1,813,805		$ 1,838,441
Electronic Funds Source LLC
Business Acquisition [Line Items]
Consideration transferred, shares (in shares)	4,012,000
Consideration transferred, shares, amount	$ 355,000
Percent of ownership interest acquired	9.40%
Payments to acquire businesses	$ 1,182,000
Consideration transferred	1,444,000
Cash acquired in acquisition	$ 93,000
Direct ownership in the limited liability company	49.50%
Direct ownership held by other corporation	50.50%
Goodwill, expected tax deductible amount	$ 557,000
Allocation of the purchase price by the assets and liabilities acquired
Total consideration, net of cash acquired		1,444,235		1,444,235		1,444,235
Accounts receivable		162,684		162,684		162,684
Property and equipment		2,388		2,388		2,387
Measurement period adjustments, property and equipment				1
Deferred income tax assets		41,344		41,344		34,992
Measurement period adjustments, deferred income tax assets				6,352
Other assets		739		739		0
Measurement period adjustments, other assets				739
Accounts payable		(153,529)		(153,529)		(153,777)
Measurement period adjustments, accounts payable				248
Accrued expenses		(118,906)		(118,906)		(128,267)
Measurement period adjustments, accrued expenses				9,361
Deferred income tax liabilities		(63,123)		(63,123)		(91,194)
Goodwill		685,418		685,418		728,890
Measurement period adjustments, goodwill				(43,472)
Estimated amortization expense related to the definite-lived intangible assets
Remaining 2,017		21,344		21,344
2,018		80,987		80,987
2,019		74,548		74,548
2,020		68,685		68,685
2,021		60,654		60,654
2,022		53,537		53,537
Thereafter		427,408		427,408
Total revenues		46,957		135,578
Pre-tax adjusted net income		8,058		28,070
Unaudited pro forma operational results
Total revenues			$ 287,756		$ 799,039
Net earnings attributable to shareholders			$ 27,973		$ 48,584
Pro forma net income attributable to shareholders per common share - Basic (in dollars per share)			$ 0.65		$ 1.14
Pro forma net income attributable to shareholders per common share - Diluted (in dollars per share)			$ 0.65		$ 1.13
Electronic Funds Source LLC | Acquisition-related Costs
Unaudited pro forma operational results
Net earnings attributable to shareholders			$ 11,903		$ 18,497
Electronic Funds Source LLC | Fleet Solutions
Allocation of the purchase price by the assets and liabilities acquired
Goodwill and other intangible assets	1,235,331
Electronic Funds Source LLC | Travel and corporate solutions
Allocation of the purchase price by the assets and liabilities acquired
Goodwill and other intangible assets	$ 337,307
Electronic Funds Source LLC | Customer relationships
Allocation of the purchase price by the assets and liabilities acquired
Intangible assets		841,400		841,400		842,700
Measurement period adjustments, intangibles				(1,300)
Weighted average life	8 years 1 month 6 days
Electronic Funds Source LLC | Developed technologies
Allocation of the purchase price by the assets and liabilities acquired
Intangible assets		32,120		32,120		32,120
Weighted average life	2 years
Electronic Funds Source LLC | Trade name
Allocation of the purchase price by the assets and liabilities acquired
Intangible assets		$ 13,700		$ 13,700		$ 13,700
Weighted average life	7 years 8 months 12 days

Accounts Receivable - Additiona

Accounts Receivable - Additional Information (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Concentration Risk [Line Items]
Trade receivable payments terms (30 days or less)	30 days
Threshold period past due for write-off of trade accounts receivable	150 days
Revolving Credit Facility
Concentration Risk [Line Items]
Accounts Receivable, Gross	$ 11,200		$ 3,400
Customer One | Customer Concentration Risk | Accounts receivable
Concentration Risk [Line Items]
Concentration risk, percentage			11.00%
Current–29 days past due | Credit Concentration Risk | Accounts receivable
Concentration Risk [Line Items]
Concentration risk, percentage	95.00%	93.00%
Current–59 days past due | Credit Concentration Risk | Accounts receivable
Concentration Risk [Line Items]
Concentration risk, percentage	97.00%	97.00%

Accounts Receivable - Changes i

Accounts Receivable - Changes in Reserves for Accounts Receivable (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance, beginning of year	$ 20,092	$ 13,832
Provision for credit losses	47,927	19,849
Charges to other accounts	12,221	0
Charge-offs	(53,044)	(24,825)
Recoveries of amounts previously charged-off	5,085	4,980
Currency translation	431	151
Balance, end of period	$ 32,712	$ 13,987

Earnings per Share - Summary of

Earnings per Share - Summary of Net Earning Attributable to Shareholders and Reconciliation of Basic and Diluted Shares (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Net earnings attributable to shareholders	$ 33,971	$ 19,696	$ 80,462	$ 55,350
Weighted average common shares outstanding – Basic (in shares)	43,014	42,788	42,963	40,126
Dilutive impact of share-based compensation awards (in shares)	87	83	129	73
Weighted average common shares outstanding – Diluted (in shares)	43,101	42,871	43,092	40,199

Earnings per Share - Stock Opti

Earnings per Share - Stock Options and Restricted Stock Units (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share (in shares)	0	0	0	0

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Details) - agreement	Sep. 30, 2017	Nov. 30, 2016	Mar. 31, 2016
Derivative [Line Items]
Fixed rate variable interest	2.25%
Interest rate swap agreements - unrealized portion
Derivative [Line Items]
Number of derivative instruments held (agreement)		3
Interest rate swap agreements - unrealized portion | London Interbank Offered Rate (LIBOR) | Minimum
Derivative [Line Items]
Fixed rate variable interest		0.896%
Interest rate swap agreements - unrealized portion | London Interbank Offered Rate (LIBOR) | Maximum
Derivative [Line Items]
Fixed rate variable interest		1.125%
Price Risk Derivative
Derivative [Line Items]
Percentage hedged by fuel price derivatives			20.00%

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Notional Amounts of Interest Rate Swap Agreements (Details) - Derivatives Not Designated as Hedging Instruments	Nov. 30, 2016USD ($)
Tranche A
Derivative [Line Items]
Notional amount at inception	$ 400,000,000
Amortization	5.00%
Fixed interest rate	1.108%
Tranche B
Derivative [Line Items]
Notional amount at inception	$ 150,000,000
Fixed interest rate	1.125%
Tranche C
Derivative [Line Items]
Notional amount at inception	$ 250,000,000
Fixed interest rate	0.896%

Derivative Instruments - Summar

Derivative Instruments - Summary of Aggregate Notional Amount of Foreign Currency Swap Contracts (Details) - Foreign currency swaps $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2017AUD	Sep. 30, 2016AUD
Derivative [Line Items]
Gain (loss) on foreign currency swaps | $	$ 0	$ 0	$ 0	$ 0
Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Australian dollar | AUD					AUD 10,000,000	AUD 10,000,000

Derivative Instruments - Locati

Derivative Instruments - Location and Amounts of Derivative Fair Values in Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Derivatives Not Designated as Hedging Instruments | Interest rate swap agreements - unrealized portion | Other assets
Derivatives, Fair Value [Line Items]
Derivatives Classified as Assets	$ 12,059	$ 12,908

Derivative Instruments - Loca47

Derivative Instruments - Location and Amounts of Derivative Gains and Losses in Condensed Consolidated Statements of Income (Details) - Derivatives Not Designated as Hedging Instruments - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net realized and unrealized gain on fuel price derivatives | Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in income on derivative	$ 0	$ 0	$ 0	$ 711
Net unrealized loss on interest rate swap agreements | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in income on derivative	(150)	0	(849)	0
Financing interest income (expense) | Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) recognized in income on derivative	$ 377	$ 0	$ (243)	$ 0

Financing and Other Debt - Addi

Financing and Other Debt - Additional Information (Details)	Jul. 03, 2017USD ($)	Jul. 01, 2016USD ($)	Apr. 07, 2016	Sep. 30, 2017USD ($)	Sep. 30, 2017USD ($)	Dec. 31, 2016USD ($)	Oct. 30, 2017USD ($)	Nov. 30, 2016agreement
Debt Instrument [Line Items]
Lines of credit outstanding				$ 1,727,472,000	$ 1,727,472,000	$ 1,599,291,000
Maximum borrowing capacity				$ 246,500,000	$ 246,500,000	250,000,000
Basis points added to LIBOR				2.25%	2.25%
Receivables transferred as part of securitization agreement				$ 150,845,000	$ 150,845,000	97,417,000
Securitized debt				$ 122,475,000	$ 122,475,000	$ 84,323,000
Interest rate swap agreements - unrealized portion
Debt Instrument [Line Items]
Number of derivative instruments held (agreement) | agreement								3
Minimum | London Interbank Offered Rate (LIBOR) | Interest rate swap agreements - unrealized portion
Debt Instrument [Line Items]
Basis points added to LIBOR								0.896%
Maximum | London Interbank Offered Rate (LIBOR) | Interest rate swap agreements - unrealized portion
Debt Instrument [Line Items]
Basis points added to LIBOR								1.125%
Interest Rate Option Two | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		1.00%
Interest Rate Option Two | Federal Fund Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		0.50%
2016 Credit Agreement Tranche A | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Margin on variable rate, percent	2.75%
2016 Credit Agreement Tranche A | Base Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		1.75%
2016 Credit Agreement Tranche A | Interest Rate Option One | Eurocurrency Rate
Debt Instrument [Line Items]
Basis spread on variable rate, reduction in basis points		0.50%
Debt instrument, interest rate, floor		0.00%
2016 Credit Agreement Tranche A | Interest Rate Option One | Minimum | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		1.75%
2016 Credit Agreement Tranche A | Interest Rate Option One | Maximum | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		2.75%			2.25%
2016 Credit Agreement Tranche A | Interest Rate Option Two | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		1.25%
2016 Credit Agreement Tranche A | Interest Rate Option Two | Minimum | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		0.75%
2016 Credit Agreement Tranche A | Interest Rate Option Two | Maximum | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		1.75%
2016 Credit Agreement Tranche B
Debt Instrument [Line Items]
Weighted average annual interest rate, percent				3.90%	3.90%	4.20%
Debt instrument unamortized discount, percent		1.00%
2016 Credit Agreement Tranche B | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Margin on variable rate, percent	2.75%
2016 Credit Agreement Tranche B | Base Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		1.75%
2016 Credit Agreement Tranche B | Interest Rate Option One | Eurocurrency Rate
Debt Instrument [Line Items]
Basis spread on variable rate, reduction in basis points		0.75%
2016 Credit Agreement Tranche B | Interest Rate Option One | Maximum | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		2.75%
2016 Credit Agreement Tranche B | Interest Rate Option Two | Maximum | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		1.75%
2016 Credit Agreement
Debt Instrument [Line Items]
Current borrowing capacity				$ 320,000,000	$ 320,000,000
Permitted securitization transactions	$ 350,000,000
Cash allowed to be excluded for determining consolidated funded indebtedness	$ 75,000,000
2016 Credit Agreement | Minimum
Debt Instrument [Line Items]
Commitment fee percentage		0.30%
2016 Credit Agreement | Maximum
Debt Instrument [Line Items]
Commitment fee percentage		0.50%			0.45%
2016 Credit Agreement | Interest Rate Option One | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent					2.75%
2016 Credit Agreement | Interest Rate Option One | Minimum | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		1.75%
2016 Credit Agreement | Interest Rate Option One | Maximum | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		3.25%
Loan Participations and Assignments
Debt Instrument [Line Items]
Increase in funding capacity					$ 90,000,000
Debt instrument, aggregate principal amount				185,000,000	185,000,000
Debt balance				154,521,000	$ 154,521,000	$ 95,000,000
Loan Participations and Assignments | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Margin on variable rate, percent					2.25%
Loan Participations and Assignments, Amounts Maturing August 2017
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount				85,000,000	$ 85,000,000
Loan Participations and Assignments, Amounts Maturing December 2020
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount				50,000,000	50,000,000
Loan Participations and Assignments, Amounts Maturing On Demand
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount				19,521,000	19,521,000
WEX Brazil Securitization Facility
Debt Instrument [Line Items]
Receivables transferred as part of securitization agreement				20,000,000	20,000,000
Securitized debt				20,000,000	20,000,000
Australian Securitization Facility
Debt Instrument [Line Items]
Securitized debt				$ 83,100,000	$ 83,100,000	$ 78,600,000
Securitization facility, percentage of receivables used as collateral				85.00%	85.00%
Interest rate during period, percent					2.70%	2.65%
European Securitization Facility
Debt Instrument [Line Items]
Interest rate during period, percent					0.42%	0.95%
Debt instrument, term			5 years
Securitized debt				$ 18,800,000	$ 18,800,000	$ 5,700,000
Credit Facility Term Loans | 2016 Credit Agreement Tranche A
Debt Instrument [Line Items]
Current borrowing capacity		$ 925,000,000
Credit Facility Term Loans | 2016 Credit Agreement Tranche B
Debt Instrument [Line Items]
Current borrowing capacity		$ 1,200,000,000
Lines of credit outstanding				1,611,563,000	1,611,563,000
Revolving Credit Facility | 2016 Credit Agreement
Debt Instrument [Line Items]
Current borrowing capacity				470,000,000	470,000,000
Lines of credit outstanding				149,423,000	$ 149,423,000
Revolving Credit Facility | 2016 Credit Agreement | Interest Rate Option Two | Minimum | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		0.75%
Revolving Credit Facility | 2016 Credit Agreement | Interest Rate Option Two | Maximum | Eurocurrency Rate
Debt Instrument [Line Items]
Margin on variable rate, percent		2.25%			1.75%
Revolving Credit Facility | 2011 Credit Agreement | Letter of Credit
Debt Instrument [Line Items]
Lines of credit outstanding				13,000,000	$ 13,000,000	13,000,000
Line of Credit
Debt Instrument [Line Items]
Lines of credit outstanding				$ 28,500,000	$ 28,500,000	$ 0
Subsequent Event | Revolving Credit Facility | 2016 Credit Agreement
Debt Instrument [Line Items]
Additional capacity added to revolving credit facility							$ 100,000,000
WEX Brazil
Debt Instrument [Line Items]
Weighted average annual interest rate, percent				21.40%	21.40%	19.70%
Outstanding debt				$ 11,743,000	$ 11,743,000	$ 30,755,000
WEX Brazil | WEX Brazil Securitization Facility
Debt Instrument [Line Items]
Receivables transferred as part of securitization agreement				31,200,000	$ 31,200,000
Proceeds from accounts receivable securitization				27,700,000
Discount on accounts receivable securitization				3,500,000
Servicing fee income				$ 2,000,000

Financing and Other Debt - Sche

Financing and Other Debt - Schedule of Debt Issuance Costs Related to Revolving Line-of-Credit Facilities, Term Loans, and Notes Outstanding (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Notes outstanding 1
Line of Credit Facility [Line Items]
Debt issuance costs, net	$ 3,915	$ 4,466
Revolving line of credit facility and term loans
Line of Credit Facility [Line Items]
Debt issuance costs, net	$ 33,514	$ 38,334

Off-Balance Sheet Arrangements

Off-Balance Sheet Arrangements (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017USD ($)	Sep. 30, 2017USD ($)
WEX Europe Services
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of factoring receivables	$ 170,000	$ 394,000
Loss on sale of factoring receivables	1,150	2,600
Amount of factoring receivables	54,000	54,000
Amount of factoring receivables, portion in excess of the established credit limit	$ 3,600	3,600
WEX Brazil
Accounts, Notes, Loans and Financing Receivable [Line Items]
Proceeds from sale of factoring receivables		16,300
Loss on sale of factoring receivables		$ 800

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value and Related Hierarchy Levels (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets
Total available-for-sale securities	$ 23,584	$ 23,525
Level 2 | Interest rate swaps
Assets
Derivative asset	12,059	12,908
Level 1
Assets
Executive deferred compensation plan trust	6,517	5,673
Municipal bonds | Level 2
Assets
Total available-for-sale securities	534	682
Asset-backed securities | Level 2
Assets
Total available-for-sale securities	395	648
Mortgage-backed securities | Level 2
Assets
Total available-for-sale securities	450	490
Fixed-income mutual fund | Level 1
Assets
Total available-for-sale securities	$ 22,205	$ 21,705

Fair Value - Additional Informa

Fair Value - Additional Information (Details) - Senior Notes - USD ($)	Sep. 30, 2017	Dec. 31, 2016	Jan. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate, stated percentage			4.75%
Reported Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Senior Notes			$ 400,000,000
Estimate of Fair Value Measurement | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	$ 411,500,000	$ 390,000,000

Income Taxes Additional Informa

Income Taxes Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Effective tax rate	35.40%	24.00%	35.50%	30.40%
Excess tax benefits recognized			$ 1,600
Undistributed earnings of certain foreign subsidiaries	$ 45,981		$ 45,981		$ 25,824

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	May 31, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of units awarded		$ 400	$ 4,416	$ 45,741	$ 30,343
Performance Based Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of stock options	10 years
Conditional threshold period for options vesting				20 days
Service period				3 years
Stock Options | 2010 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Term of stock options				10 years
Period for stock options to become exercisable				3 years
Share-based Compensation Award, Tranche One | Stock Options | 2010 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage				33.00%
Share-based Compensation Award, Tranche Two | Stock Options | 2010 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage				33.00%
Share-based Compensation Award, Tranche Three | Stock Options | 2010 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting rights, percentage				33.00%

Stock-Based Compensation - Sche

Stock-Based Compensation - Schedule of Assumptions Used to Calculate Fair Value of Performance-Based Stock Options (Details) - Performance Based Stock Options	1 Months Ended
	May 31, 2017$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price (in dollars per share)	$ 99.69
Expected stock price volatility	31.14%
Risk-free interest rate	2.18%
Weighted average fair value of performance options granted (in dollars per share)	$ 28.69

Stock-Based Compensation - Sc56

Stock-Based Compensation - Schedule of Assumptions Used to Calculate Fair Value of Stock Options (Details) - Stock Options	Mar. 20, 2017$ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average expected life (in years)	6 years
Weighted average exercise price (in dollars per share)	$ 104.95
Weighted average volatility	30.67%
Weighted average risk-free rate	2.13%
Weighted average fair value (in dollars per share)	$ 35.58

Impairment and Restructuring 57

Impairment and Restructuring Activities - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Cost and Reserve [Line Items]
Impairment charge	$ 0	$ 0	$ 16,175	$ 0
Restructuring charges incurred to date	$ 25,689		25,689
Fleet Solutions
Restructuring Cost and Reserve [Line Items]
Impairment charge			$ 16,175

Impairment and Restructuring 58

Impairment and Restructuring Activities - Schedule of Restructuring Reserve (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Reserve
Balance, beginning of period	$ 8,683	$ 10,573	$ 10,657	$ 7,249
Restructuring charges	4,639	2,531	6,799	7,626
Reserve release	0	0	(533)	0
Cash paid	(3,371)	(1,063)	(8,173)	(3,188)
Other	0	0	107	0
Impact of foreign currency translation	13	965	574	1,319
Balance, end of period	9,964	13,006	9,964	13,006
Year 2,015
Restructuring Reserve
Balance, beginning of period	3,008	7,085	5,231	7,249
Restructuring charges	431	446	1,964	2,035
Cash paid	(656)	(638)	(3,492)	(2,763)
Liability transfer to from one plan to another	0	0	(1,158)	0
Impact of foreign currency translation	(22)	701	216	1,073
Balance, end of period	2,761	7,594	2,761	7,594
Year 2,016
Restructuring Reserve
Balance, beginning of period	4,342	3,488	3,662	0
Restructuring charges	88	0	307	3,506
Reserve release	0	0	(533)	0
Cash paid	(1,778)	(4)	(2,265)	(4)
Liability transfer to from one plan to another	0	0	1,158	0
Impact of foreign currency translation	35	264	358	246
Balance, end of period	2,687	3,748	2,687	3,748
Acquisition Integration Restructuring Initiative
Restructuring Reserve
Balance, beginning of period	1,333	0	1,764	0
Restructuring charges	4,120	2,085	5,061	2,085
Cash paid	(937)	(421)	(2,416)	(421)
Other	0	0	107	0
Balance, end of period	4,516	1,664	4,516	1,664
Total Restructuring Charges, Including Other Restructuring Costs
Restructuring Reserve
Restructuring charges	$ 4,639	$ 2,531	$ 7,332	$ 7,626

Segment Information - Additiona

Segment Information - Additional Information (Details)	9 Months Ended
	Sep. 30, 2017segment
Segment Reporting [Abstract]
Number of reportable segments	3

Segment Information - Pre-Tax I

Segment Information - Pre-Tax Income Before NCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Payment processing revenue	$ 145,702	$ 146,182	$ 423,434	$ 383,319
Account servicing revenue	71,322	58,815	198,538	150,770
Finance fee revenue	50,879	36,138	136,336	92,348
Other revenue	56,099	46,621	160,935	101,184
Total revenues	324,002	287,756	919,243	727,621
Depreciation and amortization	51,229	46,008	150,428	91,381
Adjusted operating income	120,262	110,489	341,253	252,092
Fleet Solutions
Segment Reporting Information [Line Items]
Payment processing revenue	90,270	83,132	264,210	216,133
Account servicing revenue	44,858	37,414	122,238	90,400
Finance fee revenue	40,773	33,230	113,754	85,841
Other revenue	36,177	30,982	103,003	57,417
Total revenues	212,078	184,758	603,205	449,791
Depreciation and amortization	37,172	35,172	109,610	62,927
Adjusted operating income	74,782	68,987	214,421	145,009
Travel and Corporate Solutions
Segment Reporting Information [Line Items]
Payment processing revenue	44,177	52,551	119,328	130,372
Account servicing revenue	206	242	528	852
Finance fee revenue	87	115	469	336
Other revenue	16,556	10,407	43,414	30,235
Total revenues	61,026	63,315	163,739	161,795
Depreciation and amortization	3,185	1,630	9,445	3,007
Adjusted operating income	33,971	31,449	84,935	74,639
Health and Employee Benefit Solutions
Segment Reporting Information [Line Items]
Payment processing revenue	11,255	10,499	39,896	36,814
Account servicing revenue	26,258	21,159	75,772	59,518
Finance fee revenue	10,019	2,793	22,113	6,171
Other revenue	3,366	5,232	14,518	13,532
Total revenues	50,898	39,683	152,299	116,035
Depreciation and amortization	10,872	9,206	31,373	25,447
Adjusted operating income	$ 11,509	$ 10,053	$ 41,897	$ 32,444

Segment Information - Summary o

Segment Information - Summary of Interest Income by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Interest Income	$ 12,051	$ 3,898	$ 26,586	$ 9,053
Fleet Solutions
Segment Reporting Information [Line Items]
Interest Income	944	961	2,764	2,547
Travel and corporate solutions
Segment Reporting Information [Line Items]
Interest Income	208	143	569	330
Health and Employee Benefit Solutions
Segment Reporting Information [Line Items]
Interest Income	$ 10,899	$ 2,794	$ 23,253	$ 6,176

Segment Information - Reconcili

Segment Information - Reconciliation of Adjusted Operating Income to Income Before Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Segment Reporting Information [Line Items]
Adjusted operating income	$ 120,262	$ 110,489	$ 341,253	$ 252,092
Acquisition-related intangible amortization	(38,510)	(33,855)	(114,603)	(59,066)
Other acquisition and divestiture related items	(1,006)	(13,100)	(3,380)	(19,694)
Stock-based compensation	(8,483)	(5,199)	(22,354)	(14,312)
Restructuring and other costs	(6,024)	(3,767)	(10,169)	(11,689)
Impairment charge	0	0	(16,175)	0
Debt restructuring	(2,516)	0	(2,516)	0
Operating income	63,723	54,568	172,056	147,331
Financing interest expense	(25,754)	(35,064)	(81,449)	(87,040)
Net foreign currency gain	14,611	5,932	33,578	17,233
Net unrealized loss on interest rate swap agreements	(150)	0	(849)	0
Net realized and unrealized gain on fuel price derivatives	0	0	0	711
Non-cash adjustments related to tax receivable agreement	0	(168)	0	(168)
Operating income	52,430	25,268	123,336	78,067
Fleet Solutions
Segment Reporting Information [Line Items]
Adjusted operating income	74,782	68,987	214,421	145,009
Impairment charge			(16,175)
Travel and corporate solutions
Segment Reporting Information [Line Items]
Adjusted operating income	33,971	31,449	84,935	74,639
Health and Employee Benefit Solutions
Segment Reporting Information [Line Items]
Adjusted operating income	$ 11,509	$ 10,053	$ 41,897	$ 32,444

Supplementary Regulatory Capi63

Supplementary Regulatory Capital Disclosure (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Debt Disclosure [Abstract]
Total Capital to risk-weighted assets, Actual Amount	$ 326,773	$ 228,402
Total Capital to risk-weighted assets, Actual, Ratio	13.12%	12.59%
Total Capital to risk-weighted assets, Minimum for Capital Adequacy Purposes Amount	$ 199,249	$ 145,182
Total Capital to risk-weighted assets, Minimum for Capital Adequacy Purposes, Ratio	8.00%	8.00%
Total Capital to risk-weighted assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 249,061	$ 181,477
Total Capital to risk-weighted assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	10.00%	10.00%
Tier 1 Capital to average assets, Actual Amount	$ 314,473	$ 214,847
Tier 1 Capital to average assets, Actual, Ratio	12.09%	11.10%
Tier 1 Capital to average assets, Minimum for Capital Adequacy Purposes Amount	$ 104,004	$ 77,413
Tier 1 Capital to average assets, Minimum for Capital Adequacy Purposes, Ratio	4.00%	4.00%
Tier 1 Capital to average assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 130,004	$ 96,767
Tier 1 Capital to average assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provision, Ratio	5.00%	5.00%
Common equity to risk-weighted assets, Actual Amount	$ 314,473	$ 214,847
Common equity to risk-weighted assets, Actual, Ratio	12.63%	11.84%
Common equity to risk-weighted assets, Minimum for Capital Adequacy Purposes Amount	$ 112,078	$ 81,665
Common equity to risk-weighted assets, Minimum for Capital Adequacy Purposes, Ratio	4.50%	4.50%
Common equity to risk-weighted assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 161,890	$ 117,961
Common equity to risk-weighted assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions, Ratio	6.50%	6.50%
Tier 1 Capital to risk-weighted assets, Actual Amount	$ 314,473	$ 214,847
Tier 1 Capital to risk-weighted assets, Actual, Ratio	12.63%	11.84%
Tier 1 Capital to risk-weighted assets, Minimum for Capital Adequacy Purposes Amount	$ 149,437	$ 108,887
Tier 1 Capital to risk-weighted assets, Minimum for Capital Adequacy Purposes, Ratio	6.00%	6.00%
Tier 1 Capital to risk-weighted assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 199,250	$ 145,183
Tier 1 capital to risk-weighted assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount, Ratio	8.00%	8.00%

Subsequent Event Acquisition of

Subsequent Event Acquisition of AOC (Details) - Subsequent Event - USD ($)	Oct. 18, 2017	Oct. 30, 2017
AOC
Subsequent Event [Line Items]
Consideration transferred	$ 112,500,000
Revolving Credit Facility | 2016 Credit Agreement
Subsequent Event [Line Items]
Additional capacity added to revolving credit facility		$ 100,000,000