WEX (WEX) 10-K 6 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2016	Mar. 02, 2017	Jun. 30, 2016
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-K
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus (Q1,Q2,Q3,FY)	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		42,741,195
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 3,395,699,049

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	$ 190,930	$ 279,989
Accounts receivable (less reserve for credit losses of $20,092 in 2016 and $13,832 in 2015)	2,054,701	1,508,605
Securitized accounts receivable, restricted	97,417	87,724
Income taxes receivable	10,765	0
Available-for-sale securities	23,525	18,562
Fuel price derivatives, at fair value	0	5,007
Property, equipment and capitalized software, net	167,278	138,585
Deferred income taxes, net	6,934	10,303
Goodwill	1,838,441	1,112,878
Other intangible assets, net	1,265,468	470,712
Other assets	341,638	215,544
Total assets	5,997,097	3,847,909
Liabilities and Stockholders’ Equity
Accounts payable	617,118	378,811
Accrued expenses	331,579	156,180
Income taxes payable	0	2,732
Deposits	1,118,823	870,518
Securitized debt	84,323	82,018
Revolving line-of-credit facilities and term loans, net	1,599,291	664,918
Deferred income taxes, net	152,906	83,912
Notes outstanding, net	395,534	394,800
Other debt	125,755	50,046
Amounts due under tax receivable agreement	47,302	57,537
Other liabilities	18,719	10,756
Total liabilities	4,491,350	2,752,228
Commitments and contingencies
Stockholders’ Equity
Common stock $0.01 par value; 175,000 shares authorized; 47,173 shares issued in 2016 and 43,079 in 2015; 42,841 shares outstanding in 2016 and 38,746 in 2015	472	431
Additional paid-in capital	547,627	174,972
Non-controlling interest	8,558	12,437
Retained earnings	1,244,271	1,183,634
Accumulated other comprehensive loss	(122,839)	(103,451)
Treasury stock at cost; 4,428 shares in 2016 and 2015	(172,342)	(172,342)
Total stockholders’ equity	1,505,747	1,095,681
Total liabilities and stockholders’ equity	$ 5,997,097	$ 3,847,909

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Accounts receivable, reserve for credit losses	$ 20,092	$ 13,832
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)	47,173,000	43,079,000
Common stock, shares outstanding (in shares)	42,841,000	38,746,000
Treasury stock, shares (in shares)	4,428,000	4,428,000

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues
Payment processing revenue	$ 520,619	$ 495,869	$ 519,987
Account servicing revenue	211,012	156,693	115,509
Finance fee revenue	138,940	88,993	80,883
Other revenue	147,889	113,082	101,268
Total revenues	1,018,460	854,637	817,647
Expenses
Salary and other personnel	286,298	234,564	200,809
Restructuring	7,486	9,010	0
Service fees	173,052	138,844	119,876
Provision for credit losses	33,348	22,825	32,144
Technology leasing and support	47,602	41,315	30,581
Occupancy and equipment	25,820	20,618	18,278
Advertising	14,864	12,891	11,814
Marketing	5,604	4,515	3,934
Postage and shipping	6,645	6,457	5,369
Communications	12,145	10,424	9,213
Depreciation and amortization	141,651	83,077	70,380
Operating interest expense	12,386	5,628	6,437
Other	56,431	36,891	30,064
Gain on sale of subsidiary	0	(1,215)	(27,490)
Total operating expenses	823,332	625,844	511,409
Operating income	195,128	228,793	306,238
Financing interest expense	(113,418)	(46,189)	(36,042)
Net foreign currency loss	(7,665)	(5,689)	(13,438)
Net unrealized gains on interest rate swap agreements	12,908	0	0
Net realized and unrealized gains on fuel price derivatives	711	5,848	46,212
Non-cash adjustments related to tax receivable agreement	(563)	2,145	(1,331)
Income before income taxes	87,101	184,908	301,639
Income taxes	29,625	75,296	101,621
Net income	57,476	109,612	200,018
Less: Net loss from non-controlling interests	(3,161)	(1,705)	(2,193)
Net earnings attributable to WEX Inc.	60,637	111,317	202,211
Accretion of non-controlling interest	0	(9,413)	0
Net earnings attributable to shareholders	$ 60,637	$ 101,904	$ 202,211
Net earnings attributable to WEX Inc. per share:
Basic (in dollars per share)	$ 1.49	$ 2.63	$ 5.20
Diluted (in dollars per share)	$ 1.48	$ 2.62	$ 5.18
Weighted average common shares outstanding:
Basic (in shares)	40,809	38,771	38,890
Diluted (in shares)	40,914	38,843	39,000

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 57,476	$ 109,612	$ 200,018
Changes in available-for-sale securities, net of tax effect of $144 in 2016, $49 in 2015 and $(175) in 2014	(251)	(83)	304
Foreign currency translation	(19,855)	(49,952)	(39,726)
Comprehensive income	37,370	59,577	160,596
Less: Comprehensive loss attributable to non-controlling interest	(3,879)	(7,979)	(6,529)
Comprehensive income attributable to WEX Inc.	$ 41,249	$ 67,556	$ 167,125

CONSOLIDATED STATEMENTS OF COM6

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Comprehensive Income [Abstract]
Changes in available-for-sale securities, tax effect	$ 144	$ 49	$ (175)

CONSOLIDATED STATEMENTS OF STOC

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Retained Earnings	Non-controlling interest in subsidiaries
Beginning Balances (in shares) at Dec. 31, 2013		38,987
Beginning Balance at Dec. 31, 2013	$ 903,297	$ 429	$ 168,891	$ (15,495)	$ (130,566)	$ 879,519	$ 519
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued upon exercise of stock options (in shares)		18
Stock issued upon exercise of stock options	239		239
Tax benefit from stock options and restricted stock units	1,867		1,867
Stock issued upon vesting of restricted and deferred stock units (in shares)		103
Stock issued upon vesting of restricted and deferred stock units	0	$ 1	(1)
Stock-based compensation, net of share repurchases for tax withholdings	8,081		8,081
Purchase of shares of treasury stock (in shares)		(211)
Purchase of shares of treasury stock	(19,765)				(19,765)
Changes in available-for-sale securities, net of tax effect of $(144) in 2016, $(49) in 2015, and $175 in 2014	304			304
Noncontrolling interest investment	21,267						21,267
Foreign currency translation	(37,389)			(35,390)			(1,999)
Net income	199,820					202,211	(2,391)
Ending Balance (in shares) at Dec. 31, 2014		38,897
Ending balance at Dec. 31, 2014	1,077,721	$ 430	179,077	(50,581)	(150,331)	1,081,730	17,396
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued upon exercise of stock options (in shares)		3
Stock issued upon exercise of stock options	33	$ 0	33
Tax benefit from stock options and restricted stock units	650		650
Stock issued upon vesting of restricted and deferred stock units (in shares)		56
Stock issued upon vesting of restricted and deferred stock units	0	$ 1	(1)
Stock-based compensation, net of share repurchases for tax withholdings	9,140		9,140
Purchase of shares of treasury stock (in shares)		(210)
Purchase of shares of treasury stock	(22,011)				(22,011)
Changes in available-for-sale securities, net of tax effect of $(144) in 2016, $(49) in 2015, and $175 in 2014	(83)			(83)
Foreign currency translation	(45,742)			(43,679)			(2,063)
Adjustment of redeemable non-controlling interest	(32,448)		(13,927)	(9,108)		(9,413)
Net income	108,421					111,317	(2,896)
Ending Balance (in shares) at Dec. 31, 2015		38,746
Ending 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	300		300
Stock issued upon vesting of restricted and deferred stock units (in shares)		62
Stock issued upon vesting of restricted and deferred stock units	0	$ 1	(1)
Stock-based compensation, net of share repurchases for tax withholdings	17,543		17,543
Changes in available-for-sale securities, net of tax effect of $(144) in 2016, $(49) in 2015, and $175 in 2014	(251)			(251)
Foreign currency translation	(19,855)			(19,137)			(718)
Tax deficiency from stock options and restricted stock units	(100)		(100)
Stock issued for purchase of EFS (in shares)		4,012
Stock issued for purchase of EFS	354,953	$ 40	354,913
Net income	57,476					60,637	(3,161)
Ending Balance (in shares) at Dec. 31, 2016		42,841
Ending balance at Dec. 31, 2016	$ 1,505,747	$ 472	$ 547,627	$ (122,839)	$ (172,342)	$ 1,244,271	$ 8,558

CONSOLIDATED STATEMENTS OF STO8

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement of Stockholders' Equity [Abstract]
Changes in available-for-sale securities, tax effect	$ 144	$ 49	$ (175)

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities
Net income	$ 57,476	$ 109,612	$ 200,018
Adjustments to reconcile net income to net cash provided by operating activities:
Net unrealized loss (gain)	(26,737)	15,852	(48,327)
Stock-based compensation	19,742	12,420	13,790
Depreciation and amortization	141,651	83,077	70,380
Ticking fees expensed	30,045	0	0
Debt restructuring and debt issuance cost amortization	10,656	3,097	2,641
Gain on divestiture	0	(1,215)	(27,490)
Loss on debt extinguishment	2,017	0	0
Provision for deferred taxes	19,499	37,359	46,111
Restructuring charge	2,711	7,561	0
Provision for credit losses	33,348	22,825	32,144
Loss on disposal of property, equipment and capitalized software	259	349	1,182
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(436,071)	199,717	55,883
Other assets	(63,730)	(17,653)	(16,920)
Accounts payable	75,807	(33,201)	(29,154)
Accrued expenses	(1,042)	9,033	29,263
Income taxes	(14,614)	10,687	(21,770)
Other liabilities	8,086	(2,322)	(3,190)
Amounts due under tax receivable agreement	(10,234)	(12,098)	(8,148)
Net cash (used for) provided by operating activities	(151,131)	445,100	296,413
Cash flows from investing activities
Purchases of property, equipment and capitalized software	(61,799)	(63,491)	(58,133)
Purchases of available-for-sale securities	(5,853)	(349)	(2,837)
Maturities of available-for-sale securities	495	594	337
Acquisitions and investment, net of cash	(1,089,282)	(80,677)	(891,725)
Acquisition of an intangible asset	(4,000)	0	0
Proceeds from divestiture	0	17,265	48,324
Net cash used for investing activities	(1,160,439)	(126,658)	(904,034)
Cash flows from financing activities
Excess tax benefits from equity instrument share-based payment arrangements	597	650	1,867
Repurchase of share-based awards to satisfy tax withholdings	(2,200)	(2,392)	(5,709)
Proceeds from stock option exercises	300	33	239
Net change in deposits	248,926	(107,345)	(109,138)
Net activity on other debt	62,474	(435)	46,851
Borrowings on revolving line-of-credit facility	3,505,732	2,203,027	2,519,742
Repayments on revolving line-of-credit facility	(3,707,248)	(2,402,118)	(2,105,321)
Borrowings on term loans	1,643,000	0	222,500
Repayments on term loans	(476,126)	(27,500)	(21,250)
Loan origination fees	(40,868)	0	(3,309)
Net change in securitized debt	3,665	84,571	0
Ticking fees paid	(22,171)	0	0
Purchase of redeemable non-controlling interest	0	(46,018)	0
Purchase of shares of treasury stock	0	(22,011)	(19,765)
Net cash provided by (used for) financing activities	1,216,081	(319,538)	526,707
Effect of exchange rates on cash and cash equivalents	6,430	(3,678)	4,191
Net change in cash and cash equivalents	(89,059)	(4,774)	(76,723)
Cash and cash equivalents, beginning of year	279,989	284,763	361,486
Cash and cash equivalents, end of year	190,930	279,989	284,763
Supplemental cash flow information
Interest paid	116,272	49,032	40,287
Income taxes paid	23,946	27,186	75,258
Supplemental disclosure of non-cash investing and financing activities
Issuance of common stock in a business combination	$ 354,953	$ 0	$ 0

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Business Description WEX Inc. (“Company”, "we" or "our") is a provider of corporate card payment solutions. The Company provides products and services that meet the needs of businesses in various geographic regions including North and South America, Asia Pacific and Europe. The Company’s Fleet Solutions, Travel and Corporate Solutions, and Health and Employee Benefit Solutions segments provide its customers with security and control for complex payments across a wide spectrum of business sectors. The Company markets its products and services directly, as well as through strategic relationships which include major oil companies, fuel retailers, vehicle maintenance providers, online travel agencies and health partners. Basis of Presentation The accompanying consolidated financial statements of WEX Inc. for the years ended December 31, 2016 , 2015 and 2014 , include the accounts of WEX Inc. and its material subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The presentation of the accompanying consolidated statements of income has been updated for the years ended December 31, 2015 and 2014 to disaggregate revenue into payment processing, account servicing, finance fee and other revenue in order to provide additional information regarding the Company’s significant revenue streams and to conform to the current year presentation. There was no change to total revenue, income from operations, net income or net income per share in any of the periods presented as a result of this updated presentation. The Company rounds amounts in the consolidated financial statements to thousands and calculates all percentages and per-share data from underlying whole-dollar amounts. Thus, certain amounts may not foot, crossfoot, or recalculate based on reported numbers due to rounding. In September 2015, the FASB issued ASU 2015-16 related to simplifying the accounting for measurement period adjustments. This standard replaces the requirement that an acquirer in a business combination account for measurement period adjustments retrospectively. Under the amendments, an acquirer must recognize adjustments to the provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined, including the effect on earnings of changes in depreciation, amortization, or other income effects as if the accounting had been completed at the acquisition date. The guidance is to be applied prospectively to adjustments to provisional amounts that occur after the effective date of the guidance. The Company adopted this standard on January 1, 2016. In April 2015, the FASB issued ASU 2015-03 related to the simplification of the presentation of debt issuance costs. The standard requires entities to present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs is reported as interest expense. The ASU provides that debt issuance costs are analogous to debt discounts and reduce the proceeds of borrowing which increases the effective interest rate. Prior to the amendment, debt issuance costs were reported in the balance sheet as an asset. The amended guidance was effective for financial statements issued for fiscal years beginning after December 15, 2015, required retrospective adoption, and represented a change in accounting principle. As a result of the adoption, the December 31, 2015 consolidated balance sheet is restated as follows: Previously Reported Effect of Accounting Principle Adoption Adjusted Consolidated balance sheet Other assets $ 225,581 $ (10,037 ) $ 215,544 Total assets 3,857,946 (10,037 ) 3,847,909 Revolving line-of-credit facilities and term loan, net 669,755 (4,837 ) 664,918 Notes outstanding, net 400,000 (5,200 ) 394,800 Total liabilities 2,762,265 (10,037 ) 2,752,228 Total liabilities and stockholders’ equity $ 3,857,946 $ (10,037 ) $ 3,847,909 Acronyms and Abbreviations The acronyms and abbreviations identified below are used in the accompanying consolidated financial statements and the notes thereto. The following is provided to aid the reader and provide a reference point when reviewing the consolidated financial statements: 2011 Credit Agreement Credit agreement entered into on May 23, 2011 among the Company, as borrower, WEX Card Holdings Australia Pty Ltd, a wholly-owned subsidiary of the Company, as specified designated borrower, Bank of America, N.A., as administrative agent and letter of credit issuer, and the other lenders party thereto 2013 Credit Agreement Amended and restated credit agreement entered into on January 18, 2013 by and among the Company and certain of our subsidiaries, as borrowers, and WEX Card Holdings Australia Pty Ltd, as specified designated borrower, with a lending syndicate 2014 Amendment Agreement Amendment and restatement agreement entered into on August 22, 2014, among the Company, the lenders party thereto, and Bank of America, N.A., as administrative agent 2014 Credit Agreement Second amended and restated credit agreement entered into on August 22, 2014, by and among the Company and certain of its subsidiaries, as borrowers, WEX Card Holding Australia Pty Ltd., as designated borrower, and Bank of America, N.A., as administrative agent on behalf of consenting lenders. 2016 Credit Agreement Credit agreement entered into on July 1, 2016 by and among the Company and certain of its subsidiaries, as borrowers, WEX Card Holding Australia Pty Ltd., as designated borrower, and Bank of America, N.A., as administrative agent on behalf of the lenders Adjusted Net Income or ANI A non-GAAP measure that adjusts net earnings attributable to shareholders to exclude acquisition and divestiture related items, debt restructuring and debt issuance cost amortization, stock-based compensation, restructuring and other costs, a vendor settlement, unrealized gains and losses on derivatives, net foreign currency remeasurement gains and losses, non-cash adjustments related to tax receivable agreement, reserves for regulatory penalties, similar adjustments attributed to our non-controlling interest and certain tax related items. ASU 2014-09 Accounting Standards Update No. 2014-09 Revenue from Contracts with Customers (Topic 606) ASU 2015-03 Accounting Standards Update No. 2015-03 Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs ASU 2015-16 Accounting Standards Update No. 2015-16 Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments ASU 2016-01 Accounting Standards Update No. 2016-01 Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ASU 2016-02 Accounting Standards Update No. 2016-02 Leases (Topic 842) ASU 2016-09 Accounting Standards Update No. 2016-09 Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting ASU 2016-13 Accounting Standards Update No. 2016-13 Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ASU 2016-15 Accounting Standards Update No. 2016-15 Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments Australian Securitization Subsidiary Southern Cross WEX 2015-1 Trust, a bankruptcy-remote subsidiary consolidated by the Company Average expenditure per payment processing transaction Average total dollars of spend in a funded fuel transaction Benaissance Benaissance, a leading provider of integrated SaaS technologies and services for healthcare premium billing, payment and workflow management, acquired by the Company on November 18, 2015. Company WEX Inc. and all entities included in the consolidated financial statements EFS Electronic Funds Source, LLC, a provider of customized corporate payment solutions for fleet and corporate customers with a focus on the large and mid-sized over-the-road fleets. On July 1, 2016, the Company acquired WP Mustang Topco LLC, the indirect parent of Electronic Funds Source, LLC and Warburg Pincus Private Equity XI (Lexington), LLC, an affiliated entity, from investment funds affiliated with Warburg Pincus LLC. Esso portfolio in Europe European commercial fleet card portfolio acquired from ExxonMobil European Securitization Subsidiary Gorham Trade Finance B.V., a bankruptcy-remote subsidiary consolidated by the Company Evolution1 EB Holdings Corp. and its subsidiaries which includes Evolution1, Inc., acquired by the Company on July 16, 2014 Evolution1 Plan Evolution1 401(k) Plan sponsored by Evolution1 Inc. FASB Financial Accounting Standards Board FDIC Federal Deposit Insurance Corporation FX Foreign exchange GAAP Generally Accepted Accounting Principles in the United States Higher One Higher One, Inc. a technology and payment services company focused on higher education Indenture The Notes were issued pursuant to an indenture dated as of January 30, 2013 among the Company, the guarantors listed therein, and The Bank of New York Mellon Trust Company, N.A., as trustee NCI Non-controlling interest NOL Net operating loss Notes $400 million notes with a 4.75% fixed rate, issued on January 30, 2013 NOW deposits Negotiable order of withdrawal deposits Over-the-road Typically heavy trucks traveling long distances Pacific Pride Pacific Pride Services, LLC, previously a wholly-owned subsidiary, sold on July 29, 2014 Payment solutions purchase volume Total amount paid by customers for transactions Payment processing transactions Funded payment transactions where the Company maintains the receivable for total purchase PPG Price per gallon of fuel rapid! PayCard rapid! PayCard, previously a line of business of the Company, sold on January 7, 2015 SaaS Software-as-a-service SEC Securities and Exchange Commission Ticking fees A fee incurred by a borrower to compensate the lender to delay a financing arrangement and hold a commitment of funds for the borrower for a period of time Total fleet transactions Total of transaction processing and payment processing transactions Transaction processing transactions Unfunded payment transactions where the Company is the processor and only has receivables for the processing fee UNIK UNIK S.A., the Company's Brazilian subsidiary, which has been subsequently branded WEX Brazil WEX WEX Inc. WEX Europe Services Consists primarily of our ESSO portfolio in Europe acquired by the Company from ExxonMobil on December 1, 2014 WEX Health Evolution1 and Benaissance, collectively Use of Estimates and Assumptions The Company prepares its consolidated financial statements in conformity with GAAP and with the Rules and Regulations of the SEC, specifically Regulation S-X and the instructions to Form 10-K. These principles require management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosures of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the period. Actual results could differ from those estimates and those differences may be material. Cash and Cash Equivalents Highly liquid investments with remaining maturities at the time of purchase of three months or less (that are readily convertible to cash) are considered to be cash equivalents and are stated at cost, which approximates fair value. Cash equivalents include federal funds sold, which are unsecured short-term investments entered into with financial institutions. Restricted Cash Restricted cash represents funds collected from individuals or employers on behalf of our customers that are to be remitted to third parties or funds required to be maintained on hand under certain vendor agreements. This restricted cash, which totaled $22,412 and $17,783 as of December 31, 2016 and 2015, respectively, is classified in Other Assets on the Company’s consolidated balance sheets. We maintain an offsetting liability against restricted cash collected and remitted on behalf of our customers. Restricted cash is not available to fund the Company’s operations. Accounts Receivable and Reserve for Credit Losses Accounts receivable balances are stated at net realizable value. The balance includes a reserve for credit losses which reflects management’s estimate of uncollectable balances resulting from credit and fraud losses. Management has consistently considered its portfolio of charge card receivables as a large group of smaller balance accounts that it has collectively evaluated for impairment. The reserve for credit losses is established based on the determination of the amount of expected credit losses inherent in the accounts receivable as of the reporting date. Management reviews delinquency reports, historical collection rates, changes in customer payment patterns, economic trends, geography and other information in order to make judgments as to probable credit losses. Management also uses historical charge off experience to determine the amount of losses inherent in accounts receivable at the reporting date. Assumptions regarding probable credit losses are reviewed periodically and may be impacted by actual performance of accounts receivable and changes in any of the factors discussed above. Available-for-sale Securities The Company records certain investments as available-for-sale securities. Available-for-sale securities are carried at fair value, with unrealized gains and losses, net of tax, reported on the consolidated balance sheets in accumulated other comprehensive loss. Realized gains and losses and declines in fair value determined to be other-than-temporary are included in non-operating expenses. The cost basis of securities is based on the specific identification method. Interest and dividends earned on securities classified as available-for-sale are included in other revenues. Available-for-sale securities held by the Company were purchased and are held by WEX Bank in order to meet the requirements of the Community Reinvestment Act. Derivatives The Company has used derivative instruments as part of its overall strategy to manage its exposure to fluctuations in fuel prices and to reduce the impact of interest rate volatility. All derivatives are recorded at fair value on the consolidated balance sheets . 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. The interest rate swaps do not qualify for hedge accounting treatment; therefore, gains or losses related to the interest rate swaps, both realized and unrealized, are recognized in earnings. For the purposes of cash flow presentation, realized and unrealized gains or losses related to the interest rate swaps are included in operating cash flows, which is consistent with the cash flow treatment of the underlying interest expense on our outstanding borrowings. The Company’s fuel price derivative instruments did not qualify for hedge accounting treatment; therefore, gains or losses related to fuel price derivative instruments, both realized and unrealized, were recognized in earnings. These instruments are presented on the consolidated balance sheet as fuel price derivatives, at fair value. For the purposes of cash flow presentation, realized and unrealized gains or losses related to fuel price derivative instruments are included in operating cash flows, as they were intended to hedge operating cash flows. After the first quarter of 2016, the Company was no longer partially hedged for changes in fuel prices. In April 2014, the Company initiated a partial foreign currency exchange hedging program and managed foreign currency exchange exposure on an intra-quarter basis. The majority of the hedges were intended to renew on a monthly basis. Because this was a partial foreign currency exchange hedging program, the Company had additional foreign currency exchange exposure which was not hedged. During the third quarter of 2015, the Company decided to suspend the foreign currency exchange hedging program for all but a few short-term intercompany transactions. Property and Equipment Property and equipment are stated at cost less accumulated depreciation. Replacements, renewals and improvements are capitalized and costs for repair and maintenance are expensed as incurred. Depreciation is primarily computed using the straight-line method over the estimated useful lives shown below. Leasehold improvements are primarily depreciated using the straight-line method over the lesser of the useful life of the asset or over the remaining lease term. Below are the estimated useful lives for assets placed in service during 2016 and beyond: Estimated Useful Lives Furniture, fixtures and equipment 3 to 5 years Internal-use computer software 3 years Computer software 18 months to 7 years Leasehold improvements up to 5 years Capitalized Software The Company develops software that is used to provide processing and information management services to customers. A significant portion of the Company’s capital expenditures is devoted to the development of such internal-use computer software. Software development costs are capitalized during the application development stage. Costs incurred during the preliminary project stage are expensed as incurred. Capitalization begins when the preliminary project stage is complete, as well as when management authorizes and commits to the funding of the project. Capitalization of costs ceases when the software is ready for its intended use. Software development costs are amortized using the straight-line method over the estimated useful life of the software. Below are the amounts of internal-use software capitalized and amortized: Year ended December 31, 2016 2015 2014 Amounts capitalized for internal-use computer software (including work-in-process) $ 55,379 $ 52,218 $ 34,053 Amounts expensed for amortization of internal-use computer software $ 27,581 $ 20,316 $ 18,661 Goodwill and Other Intangible Assets The Company classifies intangible assets in the following three categories: (1) intangible assets with definite lives subject to amortization, (2) intangible assets with indefinite lives not subject to amortization and (3) goodwill. The Company tests intangible assets with definite lives for impairment if conditions exist that indicate the carrying value may not be recoverable. Such conditions may include a reduction in operating cash flow or a dramatic change in the manner in which the asset is intended to be used. The Company would record an impairment charge when the carrying value of the definite-lived intangible asset is not recoverable from the undiscounted cash flows generated from the use of the asset. Intangible assets with indefinite lives and goodwill are not amortized. The Company tests these intangible assets and goodwill for impairment at least annually or more frequently if facts or circumstances indicate that such intangible assets or goodwill might be impaired. All goodwill and intangible assets are assigned to reporting units, which are one level below the Company’s operating segments. The Company performs impairment tests at the reporting unit level. Such impairment tests include comparing the fair value of the respective reporting unit with its carrying value, including goodwill. The Company uses both discounted cash flow analyses and comparable company pricing multiples to determine the fair value of our reporting units. Such analyses are corroborated using market analytics. Certain assumptions are used in determining the fair value, including assumptions about future cash flows and terminal values. When appropriate, the Company considers the assumptions that it believes hypothetical marketplace participants would use in estimating future cash flows. In addition, an appropriate discount rate is used, based on the Company’s cost of capital or reporting unit-specific economic factors. When the fair value is less than the carrying value of the intangible assets or the reporting unit, the Company records an impairment charge to reduce the carrying value of the assets to the reporting unit's implied fair value. The Company's annual goodwill and intangible asset impairment tests performed as of October 1, 2016 , 2015 and 2014 did not identify any impairment. Intangible assets that are deemed to have definite lives are amortized over their useful lives, which is the period of time that the asset is expected to contribute directly or indirectly to future cash flows. The Company determines the useful lives of its identifiable intangible assets after considering the specific facts and circumstances related to each intangible asset. The factors that management considers when determining useful lives include the contractual term of agreements, the history of the asset, the Company’s long-term strategy for the use of the asset, any laws or other local regulations which could impact the useful life of the asset and other economic factors, including competition and specific market conditions. An evaluation of the remaining useful lives of the definite-lived intangible assets is performed periodically to determine if any change is warranted. Impairment and Disposals of Long-lived Assets Long-lived assets are tested for impairment whenever facts or circumstances, such as a reduction in operating cash flow or a dramatic change in the manner the asset is intended to be used, indicate the carrying amount of the asset may not be recoverable. If indicators exist, the Company compares the estimated undiscounted future cash flows associated with these assets or operations to their carrying value to determine if a write-down to fair value is required. The Company did not recognize any significant impairment expense on the Company’s long-lived assets during the years ended December 31, 2016 , 2015 and 2014 . Disposals in the ordinary course of business are recorded in occupancy and equipment in the consolidated statements of income. Fair Value of Financial Instruments The carrying values of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses, and other liabilities approximate their respective fair values due to the short-term nature of such instruments. The carrying values of certificates of deposit, interest-bearing money market deposits and borrowed federal funds approximate their respective fair values as the interest rates on these financial instruments are variable market-based rates. All other financial instruments are reflected at fair value on the consolidated balance sheets. Revenue Recognition The majority of the Company’s revenues are comprised of transaction-based fees, which are generally calculated based on measures such as (i) percentage of dollar value of volume processed; (ii) number of transactions processed; or (iii) some combination thereof. The Company has entered into agreements with major oil companies, fuel retailers and vehicle maintenance providers which provide products and/or services to the Company’s customers. These agreements specify that a transaction is deemed to be captured when the Company has validated that the transaction has no errors and has accepted and posted the data to the Company’s records. The Company recognizes revenues when persuasive evidence of an arrangement exists, the products and services have been provided to the client, the sales price is fixed or determinable and collectability is reasonably assured. The Company generally records revenue net of costs based on the following criteria: (i) the Company is not the primary obligor in the arrangement; (ii) the Company has no inventory risk; (iii) the Company does not have reasonable latitude with respect to establishing the price for the product; (iv) the Company does not make any changes to the product or have any involvement in the product specifications and (v) the amount the Company earns for its services is fixed, within a limited range. The Company enters into contracts with certain large customers or strategic relationships that provide for fee rebates tied to performance milestones. Rebates are recorded as a reduction in revenue in the same period that revenue is earned or performance occurs. Rebates and incentives are calculated based on estimated performance and the terms of the related business agreements. A description of the major components of revenue are as follows: Payment Processing Revenue . Revenue consists of transaction fees as well as interchange income; • Fleet transaction fees are assessed to major oil companies, fuel retailers and vehicle maintenance providers. We extend short-term credit to the fleet customer and pay the purchase price for the fleet customer’s transaction, less the payment processing fees we retain, to the merchant. We collect the total purchase price from the fleet customer. The fee charged is generally based upon a percentage of the total transaction amount; however, it may also be based on a fixed amount charged per transaction or on a combination of both measures. The Company records revenue at the time the transaction is captured. • In Europe, our payment processing revenue is specifically derived from the difference between the negotiated price of the fuel from the supplier and the agreed upon price paid by the fleets. • Interchange income is earned from the Company’s suite of card products in the Fleet Solutions and Health and Employee Benefit Solutions segments, as well as on our virtual card technology. Interchange income is a fee paid by a merchant bank to the card-issuing bank through the interchange network. Interchange fees are set by the credit card providers. The Company recognizes interchange income as earned. With regard to fleet and travel payment processing revenue, the Company is generally responsible for the collection of the total transaction amount from the customer and the payment to the merchant of their sales amount, net of the payment processing revenue earned by the Company, and as such, recognizes revenue net of the cost of the underlying products and services. As a consequence, the Company’s accounts receivable and accounts payable related to its payment processing revenues are reflective of the total transaction amount processed by the Company, not the Company’s revenue. Account Servicing Revenue . In our Fleet Solutions segment, account servicing revenue is primarily comprised of monthly fees based on vehicles serviced. These fees are primarily in return for providing monthly vehicle data reports. In our Health and Employee Benefit Solutions segment, we also recognize account servicing fees for the per-participant per-month fee charged per consumer on our healthcare financial technology platform. Account servicing revenue is recognized monthly, as the Company fulfills its contractual service obligations. Finance Fees . The Company earns revenue by assessing monthly finance fees on accounts with overdue balances. These fees are recognized as revenue at the time the fees are assessed. The finance fee is calculated using a stated late fee rate based on the entire balance outstanding from the customer. On occasion, these fees are waived to maintain customer goodwill. The Company’s established reserve for such waived amounts is estimated and offset against the late fee revenue recognized. These waived fees amounted to $10,922 , $6,013 and $6,002 in 2016 , 2015 and 2014 , respectively. The Company engages in factoring, the purchase of accounts receivable from a third party at a discount. Revenue earned in this transaction is recorded in finance fees. We also recognize fees for interest associated with the Company’s fuel desk product and interest earned on the Company’s foreign paycard product. Other . The Company earns transaction fees, which are principally based on the number of transactions processed; however, the fees may be a percentage of the total transaction amount. These fees are recognized at the time the transaction is captured. The Company assesses fees for providing ancillary services, such as information products and services, professional services and marketing services. Other revenues also include cross-border fees, fees for overnight shipping, certain customized electronic reporting and customer contact services provided on behalf of certain of the Company’s customers. Service related revenues are recognized in the period that the work is performed. Interest and dividends earned on investments in available-for-sale securities are included in other revenues. Such income is recognized in the period that it is earned. The Company sells telematics devices as part of its WEX Telematics program. In addition, prior to the divestiture of Pacific Pride, the Company sold assorted equipment to its Pacific Pride franchisees. The Company recognizes revenue from these sales when the customer has accepted delivery of the product and collectability of the sales amount is reasonably assured. From time to time the Company enters into agreements with suppliers, partners and customers and offers incentives to establish access to new channels, enter new market segments and expand the use and acceptance of WEX products and services. As part of these agreements the Company may agree to pay an up-front bonus or fee. The company capitalizes these payments within other assets in the consolidated balance sheets and amortizes each monthly, generally on a straight-line basis against the related revenue earned throughout the life of the agreement. Stock-Based Compensation The Company recognizes the fair value of all stock-based payments to employees in its financial statements. The Company estimates the fair value of stock option awards using a Black-Scholes-Merton valuation model. The fair value of Restricted Stock Units ("RSUs"), including Performance Based Restricted Stock Units ("PBRSUs"), is determined and fixed on the grant date based on the Company's stock price. The Company uses the straight-line methodology for recognizing the expense associated with stock options and RSU grants and a graded-vesting methodology for the expense recognition of PBRSUs. This recognized expense is net of estimated forfeitures and is recorded over each award's requisite service period. Stock-based compensation is recorded in salary and other personnel expense in the consolidated statements of income. Advertising Costs Advertising and marketing costs are expensed in the period incurred. Income Taxes Income taxes are accounted for under the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which the associated temporary differences became deductible. A valuation allowance is established for those jurisdictions in which deferred tax assets realization is deemed less than more likely than not. Deferred taxes are not provided for the undistributed earnings of the Company’s foreign subsidiaries that are considered to be indefinitely reinvested outside of the United States. Current accounting guidance prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. This accounting guidance also provides guidance on derecognition, classification, interest and penalties, accounting in the interim periods, disclosure, and transition. Penalties and interest related to uncertain tax positions are recognized as a component of income tax expense. To the extent penalties and interest are not assessed with respect to uncertain tax positions, amounts accrued are reduced and reflected as a reduction of the overall income tax provision. Earnings per Common 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 def

Recent Accounting Pronouncement

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2016
Accounting Changes and Error Corrections [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements In January 2017, the FASB issued ASU 2017-04, which simplifies how an entity is required to test goodwill for impairment by eliminating Step 2, the comparison of the implied fair value of goodwill to the respective carrying amount of each reporting unit. Under the amendments, an entity will perform a one-step quantitative test and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The standard is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for testing dates after January 1, 2017. The Company does not believe this standard will have a material impact on the consolidated financial statements and related disclosures. In November 2016, the FASB issued ASU 2016-18 which provides clarification on the classification and presentation of restricted cash in the statement of cash flows, thereby reducing diversity in practice. The statement of cash flows must explain the change during the period in the total of cash and cash equivalents and amounts described as restricted cash or cash equivalents. The standard is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those fiscal years, and requires retrospective application to all periods presented. Early adoption is permitted. The Company does not believe this standard will have a material impact on our consolidated statement of cash flows. In August 2016, the FASB issued ASU 2016-15 which provides clarification on the classification of eight specific cash flow presentation issues that have developed out of diversity in practice. The issues include, but are not limited to, debt prepayment or extinguishment costs, cash receipts from payments on beneficial interests in securitization transactions, and proceeds from the settlement of insurance claims. The standard is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those fiscal years. The Company is currently evaluating the impact the standard will have on the consolidated financial statements and related disclosures. In June 2016, the FASB issued ASU 2016-13 which requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected. The measurement of expected credit losses will be based on historical experience, current conditions, and reasonable and supportable forecasts that impact the collectability of the reported amount. The standard is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those fiscal years. The Company is currently evaluating the impact the standard will have on the consolidated financial statements and related disclosures. In March 2016, the FASB issued ASU 2016-09 to simplify 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. The standard is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Adopting this standard will result in increased income tax expense volatility, the nature of which will be dependent on the magnitude of our common stock price fluctuations. The other aspects of this standard are not expected to have a material impact on the consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU 2016-02 to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. When transitioning, the standard requires leases to be recognized and measured at the beginning of the earliest period presented using a modified retrospective approach. Certain qualitative and quantitative disclosures are required. The standard is effective for annual reporting periods beginning after December 15, 2018, including interim periods within that reporting period. The Company is currently evaluating the impact the standard will have on the consolidated financial statements and related disclosures. In January 2016, the FASB issued ASU 2016-01 related to accounting for equity investments. The pronouncement requires equity investments, except those accounted for under the equity method of accounting, or those that result in consolidation of the investee, to be measured at fair value with changes in fair value recognized in net income. The standard is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The Company is currently evaluating the impact the pronouncement will have on the consolidated financial statements and related disclosures. In May 2014, the FASB issued ASU 2014-09, which will supersede most existing revenue recognition guidance under U.S. GAAP ("Topic 606"). 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. 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. As such, approximately 14% of consolidated revenues for the year ended December 31, 2016 will not be impacted by 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, or approximately 48% of consolidated revenues for the year ended December 31, 2016, will remain substantially unchanged under the new standard. The Company is in the process of assessing the remaining revenue streams that fall within the scope of this new standard. Included in this assessment is confirming principle vs. agent determinations, reviewing commission structure and applying the series guidance to the Company's revenue streams. 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 were approximately $20,000 for the year ended December 31, 2016. On July 9, 2015, the FASB voted to defer the effective date by one year to interim and annual reporting periods beginning after December 15, 2017, and permitted early adoption of the standard, but not for periods beginning on or before the original effective date of January 1, 2017. The Company is not electing early adoption and as a result the standard will become effective 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 currently anticipates adopting the standard using the modified retrospective method.

Business Acquisitions and Other

Business Acquisitions and Other Intangible Assets Acquisitions	12 Months Ended
	Dec. 31, 2016
Business Combinations [Abstract]
Business Acquisitions and Other Intangible Assets Acquisitions	Business Acquisitions and Other Intangible Asset Acquisitions The Company incurred and expensed costs directly related to completed acquisitions of $19,168 , $342 and $7,694 in 2016 , 2015 and 2014 , respectively, which are included primarily within Service fees in the consolidated statements of income. 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 will enable the combined 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 New York Stock Exchange, representing approximately 9.4% 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 12, Financing 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. During the second half of 2016, the Company obtained information to assist in determining the fair values of certain tangible and intangible assets acquired and liabilities assumed in the EFS acquisition. Based on such information, the Company recorded 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 limited liability company. The remaining 50.5 percent ownership in the limited liability company is held by 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 is currently evaluating the tax basis and the allocation of book basis to the assets acquired and liabilities assumed in this business combination. In addition, the Company is still reviewing the valuation as well as performing procedures to verify the completeness and accuracy of the data used in the independent valuation for intangible assets identified in the table below. The preliminary estimates are not expected to but could change significantly upon completion of this evaluation. The Company has not finalized the purchase accounting and estimates approximately $591,000 of the goodwill recognized in this business combination will be deductible for income tax purposes. The following represents the preliminary allocation of the purchase price by the assets and liabilities acquired and goodwill recognized in this business combination: Total consideration (net of cash acquired) $ 1,444,235 Less: Accounts receivable 162,684 Property and equipment 2,387 Customer relationships (a)(b) 842,700 Developed technologies (a)(c) 32,120 Trademarks and trade names (a)(d) 13,700 Deferred income tax assets 34,992 Accounts payable (153,777 ) Accrued expenses (128,267 ) Deferred income tax liabilities (91,194 ) Recorded goodwill (a) $ 728,890 (a) Approximately $1,273,927 in goodwill and other intangible assets recorded from this business combination were preliminarily allocated to our Fleet Solutions segment, the remaining $343,483 was preliminarily allocated to our Travel and Corporate Solutions segment. (b) Weighted average life – 8.1 years . (c) Weighted average life – 2.2 years . (d) Weighted average life – 7.7 years . At December 31, 2016, 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: 2017 $ 85,541 2018 81,131 2019 74,674 2020 68,798 2021 60,750 Thereafter $ 481,523 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 our 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. In addition, non-recurring costs that were incurred in 2016 and are directly attributable to the acquisition have been reflected in pro forma results for the year ended December 31, 2015. Such adjustments include $19,168 of transaction costs and $7,074 of expenses incurred as part of the July 2016 debt modification and extinguishment, net of the related income tax results. 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. Subsequent to the July 1, 2016 acquisition date, the operations of EFS contributed revenues of approximately $83,300 and net income before taxes of approximately $5,800 to the Company's consolidated income statement. The following represents unaudited pro forma operational results as if EFS has been included in the Company's consolidated statements of income as of January 1, 2015: Year ended December 31, 2016 2015 Total revenues $ 1,089,880 $ 994,619 Net earnings attributable to shareholders $ 42,821 $ 36,763 Pro forma net income attributable to shareholders per common share: Basic $ 1.00 $ 0.86 Diluted $ 1.00 $ 0.86 Benaissance On November 18, 2015, the Company purchased the stock of Benaissance for $80,677 . The transaction was financed through the Company’s cash on hand and existing credit facility. Benaissance provides financial management for health benefits administration by offering SaaS solutions for individual single point and consolidated group premium billing. The Company acquired Benaissance to enhance the Company's positioning in the growing healthcare market. During the fourth quarter of 2015, the Company obtained preliminary information to assist in determining the fair values of certain tangible and intangible assets acquired and liabilities assumed in the Benaissance acquisition. During the first quarter of 2016, the Company decreased certain tangible assets by $502 and increased Goodwill by $502 . Based on such information, the Company recorded intangible assets and goodwill as described below. Goodwill is expected to be deductible for tax purposes. The Company finalized our Benaissance purchase accounting in the third quarter of 2016. The operations of Benaissance contributed net revenues of approximately $2,085 and net income of approximately $399 from November 18, 2015, through December 31, 2015. The results of operations for Benaissance are presented in the Company's Health and Employee Benefit Solutions segment. The following is a summary of the final allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired) $ 80,677 Less: Accounts receivable 1,594 Other tangible assets and liabilities, net 314 Acquired software and developed technology (a) 10,300 Customer relationships(b) 27,700 Trade name(c) 1,500 Recorded goodwill $ 39,269 (a) Weighted average life – 5.0 years . (b) Weighted average life – 7.6 years . (c) Weighted average life – 8.1 years No pro forma information has been included in these financial statements as the operations of Benaissance for the period that they were not part of the Company are not material to the Company's revenues, net income and earnings per share. Acquisition of remaining 49% of UNIK On August 31, 2015, the Company acquired the remaining 49 percent ownership in UNIK for $46,018 . See Note 17 Non-controlling interest for further information. Esso portfolio in Europe On December 1, 2014, the Company acquired certain assets of the Esso portfolio in Europe through a majority owned subsidiary, WEX Europe Services Limited. The Company formed this entity during 2013 and has 75 percent ownership. The Company paid $379,458 in cash, which includes an $80,000 advance payment made in the third quarter of 2014. The transaction was financed through the Company’s cash on hand and existing credit facility. Under the terms of the transaction, WEX purchased ExxonMobil’s commercial fleet fuel card program which includes operations, funding, pricing, sales and marketing in nine countries in Europe. As part of the transaction, both parties have agreed to enter into a long term supply agreement to serve the current and future Esso Card customers and to grow the business. The Company entered into this transaction in order to expand its presence in the European market and to broaden its international footprint, while laying the foundation for further expansion. During the fourth quarter of 2014, the Company obtained preliminary information to assist in determining the fair values of certain tangible and intangible assets acquired and liabilities assumed in the Esso portfolio in Europe transaction. During 2015, the Company obtained final information to assist in determining the fair values of certain tangible and intangible assets acquired and liabilities assumed as of the acquisition date. Based on such information, the Company retrospectively adjusted the fiscal year 2014 comparative information resulting in an increase in goodwill of $ 537 , a decrease in accounts receivable of $ 2 , a decrease in the customer relationship intangible asset of $ 374 , a decrease in the licensing agreements intangible asset of $ 374 , and an increase in other tangible assets and liabilities, net, including consideration receivable of $ 213 . The Company recorded intangible assets and goodwill as described below. The Company finalized the purchase accounting during the fourth quarter of 2015. Goodwill related to this transaction is expected to be deductible for income tax purposes. The results of operations for the Esso portfolio in Europe are presented in the Company's Fleet Solutions segment. The operations of the Esso portfolio in Europe contributed net revenues of approximately $3,428 and net losses attributable to WEX Inc. of approximately $7,172 from December 1, 2014, through December 31, 2014, which includes finance costs. Goodwill related to this transaction is expected to be deducted for income tax purposes. The results of operations for the Esso portfolio in Europe are presented in the Company's Fleet Solutions segment. The following is a summary of the allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired) $ 379,458 Less: Accounts receivable 303,376 Other tangible assets and liabilities, net (8,497 ) Licensing agreements (a) 36,605 Customer relationships (b) 7,346 Recorded goodwill $ 40,628 (a) Weighted average life – 4.6 years . (b) Weighted average life – 7.2 years . Supplemental pro forma financial information related to the Esso portfolio in Europe acquisition has not been provided as it would be impracticable to do so. Historical financial information regarding the acquired assets is not accessible and, thus, the amounts would require estimates to be significant and render the disclosure irrelevant. Acquisition of Evolution1 On July 16, 2014, the Company acquired all of the outstanding stock of Evolution1, a leading provider of payment solutions within the healthcare industry, for approximately $532,174 in cash. The transaction was financed through the Company’s cash on hand and existing credit facility. Evolution1 developed and operates an all-in-one, multi-tenant technology platform, card products, and mobile offering that supports a full range of healthcare account types. This includes consumer-directed payments for health savings accounts, health reimbursement arrangements, flexible spending accounts, voluntary employee beneficiary associations, and defined contribution and wellness programs. The Company acquired Evolution1 to enhance the Company's capabilities and positioning in the growing healthcare market. During the third quarter of 2014, the Company obtained preliminary information to assist in determining the fair values of certain tangible and intangible assets acquired and liabilities assumed in the Evolution1 acquisition. During 2015, the Company obtained final information to assist in determining the fair values of certain tangible and intangible assets acquired and liabilities assumed as of the acquisition date. Based on such information, the Company retrospectively adjusted the fiscal year 2014 comparative information resulting in an increase in goodwill of $ 379 , a decrease in other tangible assets and liabilities of $ 127 , and an increase in deferred income tax liabilities of $ 252 . There were no changes to the previously reported consolidated statements of operations or statements of cash flows. The valuation of all assets and liabilities have been finalized. The results of operations for Evolution1 are presented in the Company's Health and Employee Benefit Solutions segment. The operations of Evolution1 contributed net revenues of approximately $35,976 and net losses of approximately $512 from July 16, 2014, through December 31, 2014, which includes financing costs. Evolution1 had previously recorded goodwill on its financial statements from prior acquisitions, some of which is expected to be deductible for tax purposes. The following is a summary of the allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired) $ 532,174 Less: Accounts receivable 8,418 Accounts payable (175 ) Deferred tax liabilities, net (68,768 ) Other tangible assets and liabilities, net (3,712 ) Acquired software and developed technology (a) 70,000 Customer relationships (b) 211,000 Trade name (c) 7,900 Trade name (d) 11,000 Recorded goodwill $ 296,511 (a) Weighted average life – 6.4 years . (b) Weighted average life – 9.7 years . (c) Weighted average life – 9.9 years . (d) Indefinite-lived The following represents unaudited pro forma operational results as if Evolution1 had been included in the Company’s consolidated statements of income as of January 1, 2013: December 31, 2014 2013 Total revenues $ 865,056 $ 786,854 Net earnings attributable to shareholders $ 191,415 $ 97,016 Pro forma net income attributable to WEX Inc. per common share: Net income per share – basic $ 4.92 $ 2.49 Net income per share – diluted $ 4.91 $ 2.48 The pro forma financial information assumes that the companies were combined as of January 1, 2013, and includes the business combination accounting impact from the acquisition, including acquisition related expenses, amortization charges from acquired intangible assets, interest expense for debt incurred in the acquisition and net income tax effects. The pro forma results of operations do not include any cost savings or other synergies that may result from the acquisition or any estimated integration costs that have been or will be incurred by the Company. The pro forma information as presented above is for informational purposes only and is not indicative of the results of operations that would have been achieved if the acquisition had taken place at the beginning of fiscal year 2013.

Divestitures

Divestitures	12 Months Ended
	Dec. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Divestitures	Divestitures rapid! PayCard On January 7, 2015, the Company sold the assets of its rapid! PayCard operations for $ 20,000 , which resulted in a pre-tax book gain of approximately $ 1,215 . The Company's primary focus in the U.S. continues to be in the fleet, travel, and healthcare industries. As such, the Company divested the operations of rapid! PayCard, which were not material to the Company's annual revenue, net income or earnings per share. The Company does not view this divestiture as a strategic shift in its operations. Pacific Pride On July 29, 2014, the Company sold its wholly-owned subsidiary Pacific Pride for $49,664 , which resulted in a pre-tax book gain of $27,490 . The transfer of the operations of Pacific Pride occurred on July 31, 2014. Simultaneously with the sale, the Company entered into a multi-year agreement with the buyer that continued to allow WEX branded card acceptance at Pacific Pride locations. The Company sold the operations of Pacific Pride as it did not align with the long-term strategy of the core fleet business. The operations of Pacific Pride were not material to the Company's annual revenue, net income or earnings per share. The Company does not view this divestiture as a strategic shift in its operations. The following is a summary of the allocation of the assets and liabilities sold: Consideration received $ 49,664 Less: Expenses associated with the sale 1,340 Accounts receivable 48,699 Accounts payable (53,001 ) Other tangible assets and liabilities, net 828 Customer relationships 3,727 Trademarks and trade name 1,444 Goodwill 19,137 Gain on sale $ 27,490

Accounts Receivable and Reserve

Accounts Receivable and Reserves for Credit Losses	12 Months Ended
	Dec. 31, 2016
Receivables [Abstract]
Accounts Receivable and Reserves for Credit Losses	Accounts Receivable and Reserves for Credit Losses 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. Beginning in the first quarter of 2015, the Company began to extend revolving credit to certain customers with respect to small fleet receivables. 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 $3,400 and $1,100 in receivables with revolving credit balances as of December 31, 2016 and 2015 , respectively. The portfolio of receivables consists of a large group of homogeneous smaller balance amounts that are collectively evaluated for impairment. 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. At December 31, 2016 , approximately 93 percent of the $2.2 billion trade accounts receivable balance was current and approximately 98 percent of trade accounts receivable was less than 60 days past due. At December 31, 2015 , approximately 86 percent of the $1.6 billion of trade accounts receivable was current and approximately 97 percent of trade accounts receivable was less than 60 days past due. The outstanding balance is made up of receivables from a wide range of industries. One customer represented 11 percent of the outstanding receivables balance at each of December 31, 2016 and 2015 . The following table presents changes in reserves for credit losses related to accounts receivable: Year ended December 31, 2016 2015 2014 Balance, beginning of year $ 13,832 $ 13,919 $ 10,396 Provision for credit losses 33,348 22,825 32,144 Charge-offs (33,665 ) (27,862 ) (35,302 ) Recoveries of amounts previously charged-off 6,201 5,202 6,832 Currency translation 376 (252 ) (151 ) Balance, end of year $ 20,092 $ 13,832 $ 13,919

Investments

Investments	12 Months Ended
	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Investments	Investments Available-for-sale Securities The Company’s available-for-sale securities as of December 31, 2016 and 2015 , are presented below: Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (a) 2016 Mortgage-backed securities $ 498 $ 15 $ 23 $ 490 Asset-backed securities 650 — 2 648 Municipal bonds 697 1 16 682 Equity securities (b) 22,414 — 709 21,705 Total available-for-sale securities $ 24,259 $ 16 $ 750 $ 23,525 2015 Mortgage-backed securities $ 665 $ 16 $ 31 $ 650 Asset-backed securities 850 — 2 848 Municipal bonds 424 — 26 398 Equity securities (b) 16,961 — 295 16,666 Total available-for-sale securities $ 18,900 $ 16 $ 354 $ 18,562 (a) The Company’s techniques used to measure the fair value of its investments are discussed in Note 16, Fair Value. (b) Excludes $5,673 and $5,655 in equity securities designated as trading as of December 31, 2016 and 2015 , respectively, included in Other assets on the consolidated balance sheets. See Note 15 for additional information about the securities designated as trading. The Company reviews its investments to identify and evaluate indications of possible impairment. Factors considered in determining whether a loss is temporary include the length of time and extent to which the fair value has been less than the cost basis, the financial condition and near-term prospects of the investee, and the Company’s intent and ability to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value. Substantially all of the Company’s fixed income securities are rated investment grade or better. The amount of available-for-sale securities that have been in a continuous unrealized loss position for more than twelve months is insignificant. The Company’s management has determined that these gross unrealized losses at December 31, 2016 and 2015 are temporary in nature. The Company had maturities of available-for-sale securities of $495 , $594 and $337 for the years ended December 31 2016 , 2015 and 2014 , respectively. The maturity dates of the Company’s available-for-sale securities are as follows: December 31, 2016 2015 Cost Fair Value Cost Fair Value Due after 1 year through year 5 $ 165 $ 165 $ 315 $ 313 Due after 5 years through year 10 529 529 — — Due after 10 years 653 636 959 933 Mortgage-backed securities with original maturities of 30 years 498 490 665 650 Equity securities with no maturity dates 22,414 21,705 16,961 16,666 Total $ 24,259 $ 23,525 $ 18,900 $ 18,562

Property, Equipment and Capital

Property, Equipment and Capitalized Software, Net	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Property, Equipment and Capitalized Software, Net	Property, Equipment and Capitalized Software, Net Property, equipment and capitalized software, net consist of the following: December 31, 2016 2015 Furniture, fixtures and equipment $ 69,513 $ 63,278 Computer software 254,163 212,504 Software under development 49,922 39,694 Leasehold improvements 21,257 14,492 Capital leases 759 757 Total 395,614 330,725 Less: accumulated depreciation and amortization (228,336 ) (192,140 ) Total property, equipment and capitalized software, net $ 167,278 $ 138,585 Depreciation expense, including expense associated with capital leases, was $43,821 , $35,285 and $29,758 in 2016 , 2015 and 2014 , respectively. The Company did not incur significant impairment charges during 2016 , 2015 , and 2014 .

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The changes in goodwill during the period January 1 to December 31, 2016 were as follows: Fleet Solutions Segment Travel and Corporate Solutions Segment Health and Employee Benefit Solutions Segment Total Gross goodwill, January 1, 2016 $ 735,770 $ 38,134 $ 350,321 $ 1,124,225 Acquisition of EFS 561,119 167,771 — 728,890 Acquisition adjustments — — 502 502 Impact of foreign currency translation (3,751 ) (3,134 ) 2,899 (3,986 ) Gross goodwill, December 31, 2016 1,293,138 202,771 353,722 1,849,631 Accumulated impairment, January 1, 2016 (867 ) (10,480 ) — (11,347 ) Impact of foreign currency translation 12 145 — 157 Accumulated impairment, December 31, 2016 $ (855 ) $ (10,335 ) $ — $ (11,190 ) Net goodwill, January 1, 2016 $ 734,903 $ 27,654 $ 350,321 $ 1,112,878 Net goodwill, December 31, 2016 $ 1,292,283 $ 192,436 $ 353,722 $ 1,838,441 The changes in goodwill during the period January 1 to December 31, 2015 were as follows: Fleet Solutions Segment Travel and Corporate Solutions Segment Health and Employee Benefit Solutions Total Gross goodwill, January 1, 2015 $ 759,617 $ 40,251 $ 330,094 $ 1,129,962 Acquisition of Benaissance — — 38,767 38,767 Sale of subsidiaries (147 ) — (12,386 ) (12,533 ) Impact of foreign currency translation (23,700 ) (2,117 ) (6,154 ) (31,971 ) Gross goodwill, December 31, 2015 735,770 38,134 350,321 1,124,225 Accumulated impairment, January 1, 2015 (969 ) (11,712 ) — (12,681 ) Impact of foreign currency translation 102 1,232 — 1,334 Accumulated impairment, December 31, 2015 $ (867 ) $ (10,480 ) $ — $ (11,347 ) Net goodwill, January 1, 2015 $ 758,648 $ 28,539 $ 330,094 $ 1,117,281 Net goodwill, December 31, 2015 $ 734,903 $ 27,654 $ 350,321 $ 1,112,878 Other Intangible Assets During the second half of 2016, the Company evaluated the estimated useful life of our existing over-the-road payment processing technology following the EFS acquisition. As a result of this analysis, we recorded approximately $10.1 million of accelerated amortization related to this technology. The changes in other intangible assets during the period January 1 to December 31, 2016 , were as follows: Net Carrying Amount, Beginning of Year Acquisitions Amortization Transfers (a) Impacts of Foreign Currency Translation Net Carrying Amount, End of Year Definite-lived intangible assets Acquired software and developed technology $ 114,012 $ 32,120 $ (32,109 ) $ — $ 3,993 $ 118,016 Customer relationships 297,904 842,700 (57,413 ) — (2,868 ) 1,080,323 Licensing agreements 27,398 — (5,070 ) — (694 ) 21,634 Non-compete agreement — 4,000 — — — 4,000 Patent 878 — (228 ) — 6 656 Trade name 13,144 13,700 (3,009 ) 11,000 (314 ) 34,521 Indefinite-lived intangible assets Trademarks, trade names and brand names 17,376 — — (11,000 ) (58 ) 6,318 Total $ 470,712 $ 892,520 $ (97,829 ) $ — $ 65 $ 1,265,468 (a) During the third quarter of 2016, management reevaluated a trade name assigned to the Health and Employee Benefit Solutions segment, which was previously believed to have an indefinite life. As result, it was determined it is now probable that the trade name will not be renewed upon its 2024 expiration date. As such, this intangible asset will be amortized over its seven -year remaining estimated useful life. The changes in other intangible assets during the period January 1 to December 31, 2015 , were as follows: Net Carrying Amount, Beginning of Year (a) Acquisitions Amortization Disposals Impacts of Foreign Currency Translation Net Carrying Amount, End of Year Definite-lived intangible assets Acquired software and developed technology (a) $ 119,509 $ 10,300 $ (9,844 ) $ — $ (5,953 ) $ 114,012 Customer relationships (a) 309,450 27,700 (32,468 ) (2,329 ) (4,449 ) 297,904 Licensing agreements 35,341 — (4,165 ) (164 ) (3,614 ) 27,398 Patent 1,245 — (243 ) — (124 ) 878 Trade name (a) 15,373 1,500 (1,072 ) (723 ) (1,934 ) 13,144 Indefinite-lived intangible assets Trademarks, trade names and brand names 16,379 — — — 997 17,376 Total $ 497,297 $ 39,500 $ (47,792 ) $ (3,216 ) $ (15,077 ) $ 470,712 (a) The prior year amounts have been adjusted to reflect changes as a result of finalizing the purchase accounting. See Note 3, Business Acquisitions and Other Intangible Asset Acquisitions. The following table presents the estimated amortization expense related to the definite-lived intangible assets listed above for each of the next five fiscal years: 2017 $ 148,774 2018 130,586 2019 120,814 2020 110,269 2021 $ 98,260 Other intangible assets consist of the following: December 31, 2016 December 31, 2015 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived intangible assets Acquired software and developed technology $ 187,499 $ (69,483 ) $ 118,016 $ 155,182 $ (41,170 ) $ 114,012 Customer relationships 1,247,624 (167,301 ) 1,080,323 403,382 (105,478 ) 297,904 Licensing agreements 30,760 (9,126 ) 21,634 31,903 (4,505 ) 27,398 Non-compete agreement 4,000 — 4,000 — — — Patent 2,380 (1,724 ) 656 2,413 (1,535 ) 878 Trade name 41,029 (6,508 ) 34,521 16,410 (3,266 ) 13,144 $ 1,513,292 $ (254,142 ) $ 1,259,150 $ 609,290 $ (155,954 ) $ 453,336 Indefinite-lived intangible assets Trademarks, trade names and brand names 6,318 17,376 Total $ 1,265,468 $ 470,712

Accounts Payable

Accounts Payable	12 Months Ended
	Dec. 31, 2016
Payables and Accruals [Abstract]
Accounts Payable	Accounts Payable Accounts payable consists of: December 31, 2016 2015 Merchant payables $ 520,058 $ 313,244 Other payables 97,060 65,567 Accounts payable $ 617,118 $ 378,811

Deposits, Borrowed Federal Fund

Deposits, Borrowed Federal Funds and Other Debt	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Deposits, Borrowed Federal Funds and Other Debt	Deposits, Borrowed Federal Funds and Other Debt The following table presents information about deposits: December 31, 2016 2015 Certificates of deposit with maturities within 1 year $ 517,524 $ 97,859 Certificates of deposit with maturities greater than 1 year and less than 5 years 208,048 54,448 Interest-bearing money market deposits 325,464 369,191 Negotiable order of withdrawal deposits — 308,998 Customer deposits 67,787 40,022 Total deposits $ 1,118,823 $ 870,518 Weighted average cost of funds on certificates of deposit outstanding 0.96 % 0.90 % Weighted average cost of interest-bearing money market deposits 0.76 % 0.45 % WEX Bank has issued certificates of deposit with maturities ranging from 1 month to 3 years and with interest rates ranging from 0.65 percent to 1.35 percent as of December 31, 2016 . WEX Bank may issue certificates of deposit without limitation on the balance outstanding. WEX Bank must maintain minimum financial ratios, which include risk-based asset and capital requirements, as prescribed by the FDIC. As of December 31, 2016 , certificates of deposit were in denominations of $250 or less. The Company requires deposits from certain customers as collateral for credit that has been extended. These deposits are generally non-interest bearing. The Company also had federal funds lines of credit totaling $250,000 and $257,500 at December 31, 2016 and 2015 , respectively. There were no borrowings against these lines of credit at December 31, 2016 and 2015 . Interest-bearing money market deposits are issued in denominations of $250 or less, and pay interest at variable rates based on LIBOR or the Federal Funds rate. Money market deposits may be withdrawn by the holder at any time, although notification may be required and the monthly number of transactions is limited. During the fourth quarter of 2016, the Company's agreement with Higher One to offer NOW accounts ended. As a result, the Company does not have any non-interest bearing NOW account deposits outstanding as of December 31, 2016 . Other Debt WEX Brazil Debt WEX Brazil had debt of approximately $30,755 and $5,046 as of December 31, 2016 and 2015 , respectively. This is comprised of credit facilities and loan arrangements related to our accounts receivable, with various maturity dates. This debt is classified in Other debt on the Company’s consolidated balance sheets for the periods presented. Participation Debt During the second quarter of 2014, WEX Bank entered into an agreement with a third-party bank to fund customer balances that exceeded WEX Bank's lending limit to an individual customer. This agreement was most recently amended in July 2016 to extend the maturity date while maintaining a funding capacity of $45,000 . During the second quarter of 2016 , WEX Bank entered into another agreement with a separate third-party bank for incremental funding capacity of $10,000 . This second agreement was amended in August 2016 to increase the incremental funding capacity to $50,000 . These borrowings carry a variable interest rate of 1 to 3-month LIBOR plus a margin of 225 basis points . The balance of the debt was $95,000 and $45,000 as of December 31, 2016 and 2015 , respectively, and was secured by an interest in the underlying customer receivables. The participation debt balance will fluctuate on a daily basis based on customer funding needs, and could range from $0 to $95,000 . The Company's participation debt agreements will mature on December 31, 2020 and August 18, 2017 , respectively. This debt is classified in Other debt on the Company’s consolidated balance sheets for the periods presented. The following table presents the average interest rates for deposits, borrowed federal funds and other debt: Year ended December 31, 2016 2015 2014 Average interest rate: Deposits 0.94 % 0.65 % 0.53 % Borrowed federal funds 0.69 % 0.39 % 0.38 % Interest-bearing money market deposits 0.50 % 0.25 % 0.23 % WEX Brazil debt 19.70 % 15.21 % 17.15 % Participation agreement 2.94 % 2.57 % 2.46 % Average deposits and borrowed federal funds balance $ 1,102,210 $ 1,026,963 $ 1,220,979 Average other debt (WEX Brazil and participation agreements) $ 92,684 $ 51,209 $ 37,876

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	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 our outstanding variable-interest rate borrowings. Commencing January 2017, the Company will receive variable interest of 1-month LIBOR under these swaps and will pay fixed rates between 0.896% to 1.125% under these swap agreements, reducing a portion of the variability of the future interest payments associated with $800,000 of the Company's borrowings. The notional amounts, fixed and variable interest rates and maturities of the interest rate swap agreements are as follows: Tranche A Tranche B Tranche C Notional amount $400,000 $150,000 $250,000 Amortization 5% annually N/A N/A Maturity date 12/31/2020 12/31/2020 12/31/2018 Fixed interest rate 1.108% 1.125% 0.896% See Note 16, Fair Value for more information regarding the valuation of our interest rate swaps. Foreign Currency Exchange Program In April 2014, the Company initiated a partial foreign currency exchange hedging program. In 2014, the Company managed its foreign currency exchange exposure on an intra-quarter basis. During the third quarter of 2015, the Company decided to suspend the foreign currency exchange hedging program for all but a few short-term intercompany transactions. Because this was a partial foreign currency exchange hedging program, the Company had foreign currency exchange exposure which was not hedged while the program was in effect. The following table summarizes the contracts related to its foreign currency swaps, which settle in U.S. dollars at various dates within 5 days after year-end: Aggregate Notional Amount December 31, 2016 2015 Australian dollar A$ 15,000 A$ 10,000 Euro € — € 10,000 Pound sterling £ — £ 5,000 Fuel Derivatives Program The Company entered into put and call option contracts related to the Company’s commodity price risk, which were based on the wholesale price of unleaded gasoline and the retail price of diesel fuel and settled on a monthly basis. These put and call option contracts ("Options"), 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 by locking in a range of prices during any given quarter on a portion of the Company’s forecasted earnings subject to fuel price variations. During the fourth quarter of 2014, the Company suspended purchases under its fuel derivatives program due to unusually low prices in the commodities market. Management will continue to monitor the fuel price market and evaluate its alternatives as it relates to this hedging program. 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. After the first quarter of 2016, the Company was no longer hedged for changes in fuel prices. The following table presents information about the Options: December 31, 2015 Put Strike (a) Call Strike (a) Aggregate (b) Fair Fuel price derivative instruments – unleaded fuel Options settling July 2015 – March 2016 $ 2.483 $ 2.543 2,655 $ 3,082 Options settling April 2015 – December 2015 2.620 2.680 — — Options settling January 2015 – September 2015 2.625 2.685 — — Options settling October 2014 – June 2015 2.568 2.628 — — Options settling July 2014 – March 2015 $ 2.510 $ 2.570 — — Total fuel price derivative instruments – unleaded fuel 2,655 $ 3,082 Fuel price derivative instruments – diesel Options settling July 2015 – March 2016 $ 3.724 $ 3.784 1,314 $ 1,925 Options settling April 2015 – December 2015 3.785 3.845 — — Options settling January 2015 – September 2015 3.795 3.855 — — Options settling October 2014 – June 2015 3.785 3.845 — — Options settling July 2014 – March 2015 $ 3.788 $ 3.848 — — Total fuel price derivative instruments – diesel 1,314 $ 1,925 Total fuel price derivative instruments 3,969 $ 5,007 (a) The settlement of the Options is based upon the New York Mercantile Exchange’s New York Harbor Reformulated Gasoline Blendstock for Oxgenate Blending and the U.S. Department of Energy’s weekly retail on-highway diesel fuel price for the month. (b) The Options settle on a monthly basis. The following table summarizes the changes in fair value of the fuel price derivatives which have been recorded on the consolidated statements of income: Year ended December 31, 2016 2015 2014 Realized gains (losses) $ 5,718 $ 41,810 $ (2,115 ) Change in unrealized fuel price derivatives (5,007 ) (35,962 ) 48,327 Net realized and unrealized gains on derivative instruments $ 711 $ 5,848 $ 46,212 Consolidated Derivative Instruments The following table presents information on the location and amounts of derivative fair values on the consolidated balance sheets, which are recorded at fair value: Asset Derivatives Liability Derivatives December 31, 2016 December 31, 2015 December 31, 2016 December 31, 2015 Derivatives Not Designated as Hedging Instruments Balance Fair Balance Fair Balance Fair Balance Fair Interest rate swaps Other assets $ 12,908 Other assets $ — Other liabilities $ — Other liabilities $ — Commodity contracts Fuel price — Fuel price 5,007 Fuel price — Fuel price — Foreign currency contracts Accounts receivable $ 29 Accounts receivable $ — Accounts payable $ — Accounts payable $ 90 The Company’s fuel price, foreign currency, and interest rate swap derivative instruments do not qualify for hedge accounting treatment, and therefore, no such hedging designation has been made. For these derivative instruments, the gain or loss is recognized in the consolidated statements of income. The following table presents information on the location and amounts of derivative gains and losses: Derivatives Not Designated as Hedging Instruments Location of Gain Recognized in Amount of Gain Recognized in December 31, 2016 2015 2014 Foreign currency contracts Net foreign currency gain $ 59 $ 27,236 $ 15,398 Interest rate swap agreements Net unrealized gains on interest rate swap agreements $ 12,908 $ — $ — Commodity contracts Net realized and unrealized gains on fuel price derivatives $ 711 $ 5,848 $ 46,212

Financing Debt

Financing Debt	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Financing Debt	Financing 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 a tranche A term loan facility in an amount equal to $455,000 that matures on July 1, 2021 , a tranche B term loan facility in an amount equal to $1,200,000 that matures on July 1, 2023 , and a $470,000 secured revolving credit facility, with a $250,000 sublimit for letters of credit and a $20,000 sublimit for swingline loans, that terminates on July 1, 2021 . Additional loans of up to the greater of $375,000 (plus the amount of certain prepayments) and an unlimited amount subject to satisfaction of a consolidated leverage ratio test of 4.00 to 1.00 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. On July 1, 2016, the Company borrowed the entire principal amount of the tranche A term loan facility, the entire principal amount of the tranche B term loan facility and $220,000 under the revolving credit facility to pay the cash portion of the purchase price for the acquisition of EFS, repay EFS's outstanding credit facilities, repay amounts outstanding under the 2014 Credit Agreement, and pay related fees, expenses and other transaction costs, provide for working capital needs and other general corporate purposes. The total initial borrowing on July 1, 2016 was $1,875,000 and the total borrowing capacity under the 2016 Credit Agreement is $2,125,000 . 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 December 31, 2016 , the Company had no outstanding borrowings against its $470,000 revolving credit facility. Accordingly, at December 31, 2016 , the Company had $470,000 of availability under the 2016 Credit Agreement, subject to the covenants as described below. The amount of loan origination fees for the revolving credit facility were $9,150 at December 31, 2016 . The outstanding debt, net of loan origination fees, under the amortizing term loan arrangement totaled $1,599,291 at December 31, 2016 and bore a weighted average effective interest rate of 4.2% . As of December 31, 2016 and 2015 , the Company has posted approximately $13,346 and $8,550 , respectively, in letters of credit as collateral for lease agreements and virtual card and fuel payment processing activity at our foreign subsidiaries. Amounts outstanding under the 2016 Credit Agreement 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% ( 3.25% at December 31, 2016 ) with respect to the tranche A term loan facility and the revolving credit facility and between 3.25% to 3.50% ( 3.50% at December 31, 2016 ) with respect to the tranche B term loan facility (with the Eurocurrency Rate subject to a 0.75% floor in the case of the tranche B term loan facility and a 0.0% floor in the case of the tranche A term loan and revolving credit facility), in each case, based on the ratio of consolidated funded indebtedness of the Company and its subsidiaries to consolidated EBITDA 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% ( 2.25% at December 31, 2016 ) with respect to the tranche A term loan facility and the revolving credit facility or 2.25% to 2.50% ( 2.50% at December 31, 2016 ) with respect to the tranche B term loan facility, in each case, based on the ratio of consolidated funded indebtedness of the Company and its subsidiaries to consolidated EBITDA. In November 2016, the Company entered into three interest rate swap agreements to manage the interest rate risk associated with our outstanding variable-interest rate borrowings under the 2016 Credit Agreement. See Note 11 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% ( 0.50% at December 31, 2016 ) based on the ratio of consolidated funded indebtedness of the Company and its subsidiaries to consolidated EBITDA 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% . The 2016 Credit Agreement requires the Company to prepay outstanding term loans, subject to certain exceptions: • solely with respect to the tranche B term loan facility, currently with 50% (subject to reduction to 25% and 0% based upon the Company’s consolidated leverage ratio) of the Company’s annual Excess Cash Flow (as defined in the 2016 Credit Agreement); • with 100% of the net cash proceeds of certain asset sales where the proceeds exceed certain thresholds, and certain casualty and condemnation events, subject to reinvestment rights and certain other exceptions; and • with 100% of the net cash proceeds of any incurrence or issuance of certain debt, other than debt permitted under the 2016 Credit Agreement. The Company may voluntarily prepay outstanding loans from time to time, subject to certain conditions, without premium or penalty other than customary “breakage” costs with respect to Eurocurrency Rate loans, provided, however, that if on or prior to the date that is twelve (12) months following the closing date, the Company prepays any loans under the tranche B term loan facility in connection with a repricing transaction, the Company must pay a prepayment premium of 1.00% of the aggregate principal amount of the tranche B term loans so prepaid. The Company is required to make scheduled quarterly payments each equal to 1.25% in the case of the tranche A term loan facility, and 0.25% in the case of the tranche B term loan facility, of the original principal amount of the respective term loans made on the closing date, with the balance due at maturity. The 2016 Credit Agreement contains customary representations and warranties, as well as affirmative and negative covenants. The 2016 Credit Agreement also requires, solely for the benefit of the lenders under the tranche A term loan facility and the revolving credit facility, that the Company maintain at the end of each fiscal quarter the following financial ratios: • a consolidated EBITDA to consolidated interest charge coverage ratio of no less than 3.25 to 1.00 ; and • a consolidated funded indebtedness (excluding (i) up to an agreed amount of consolidated funded indebtedness under permitted securitization transactions and (ii) the non-recourse portion of any permitted factoring transaction) to consolidated EBITDA ratio of, initially, no more than 5.40 to 1.00 , which ratio shall step down to 5.25 to 1.00 at December 31, 2016 , 5.00 to 1.00 at December 31, 2017 , 4.25 to 1.00 at December 31, 2018 and 4.00 to 1.00 at December 31, 2019 . The obligations under the 2016 Credit Agreement are secured by a security interest in, subject to certain exceptions, substantially all of the assets of the Company pursuant to the terms of a U.S. Security Agreement, dated as of July 1, 2016 , in favor of Bank of America, as collateral agent for the lenders. Debt Covenants The 2016 Credit Agreement and the Indenture contain covenants that, among other things, limit the Company’s ability and the ability of its restricted subsidiaries and, in certain limited circumstances, WEX Bank and the Company’s other regulated subsidiaries, 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. These covenants are subject to important exceptions and qualifications. At any time that the Notes are rated investment grade, which is not currently the case, and subject to certain conditions, certain covenants will be suspended with respect to the Notes. WEX Bank and the Company’s other regulated subsidiaries will not be subject to some of the restrictive covenants in the Indenture that place limitations on the Company and its restricted subsidiaries’ actions, and where WEX Bank and the Company’s regulated subsidiaries are subject to covenants, there are significant exceptions and limitations on the application of those covenants to WEX Bank and the Company’s regulated subsidiaries. 2014 Credit Agreement On July 1, 2016, concurrently with the financing transactions discussed above, the Company repaid in full all outstanding amounts under the 2014 Credit Agreement and terminated all commitments by the lenders to extend further credit thereunder and all guarantees and security interests granted by the Company to the lenders thereunder. The Company did not incur any early termination penalties in connection with the termination of the 2014 Credit Agreement. As of June 30, 2016 , the Company had $282,639 of borrowings , net of loan origination fees, against its $700,000 revolving credit facility. The outstanding debt under the amortizing term loan arrangement, which was scheduled to expire in January of 2018, totaled $445,000 at June 30, 2016 and $458,750 at December 31, 2015 . As of June 30, 2016 , amounts outstanding under the amortizing term loan bore interest at a rate of LIBOR plus 200 basis points. The revolving credit facility bore interest at a rate equal to, at the Company's option, (a) LIBOR plus 200 basis points, (b) the prime rate plus 100 basis points for domestic borrowings; and the Eurocurrency rate plus 200 basis points for international borrowings. $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 2023 (the “Notes”) at an issue price of 100.0 percent of the principal amount, plus accrued interest, from January 30, 2013, in a private placement to “qualified institutional buyers” as defined in Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”), and in offshore transactions pursuant to Regulation S under the Securities Act. The Notes were issued pursuant to the Indenture among the Company, the guarantors listed therein, and The Bank of New York Mellon Trust Company, N.A., as trustee. The Notes will mature on February 1, 2023, and interest will accrue at the rate of 4.750 percent per annum. Interest is only payable semiannually in arrears on February 1 and August 1 of each year, commencing on August 1, 2013. Not considering unamortized loan origination fees, the Notes outstanding had a carrying value of $400,000 as of both December 31, 2016 and 2015. The Notes are guaranteed on a senior unsecured basis by each of the Company’s restricted subsidiaries and each of the Company’s regulated subsidiaries that guarantees the Company’s 2013 Credit Agreement, which, as of the issue date, consist of four of the Company’s restricted subsidiaries. WEX Bank, which represents a substantial amount of the Company’s operations, is not a guarantor and is not subject to many of the restrictive covenants in the indenture governing the Notes. The Notes and guarantees described above are general senior unsecured obligations ranking equally with the Company’s existing and future senior debt, senior in right of payment to all of the Company’s subordinated debt, and effectively junior in right of payment to all of the Company’s existing and future secured debt, including the Company’s 2013 Credit Agreement, to the extent of the value of the collateral securing such debt. In addition, the Notes and the guarantees are structurally subordinated to all liabilities of the Company’s subsidiaries that are not guarantors, including WEX Bank. At any time on or after February 1, 2018, the Company may redeem the Notes, in whole or in part, at the following redemption prices (expressed as a percentage of principal amount of the Notes) if redeemed during the twelve month period beginning on February 1 of the following years: (i) 102.375 percent in 2018, (ii) 101.583 percent in 2019, (iii) 100.792 percent in 2020, and (iv) 100.0 percent in 2021 and thereafter; plus, in each case, accrued and unpaid interest, if any, to, but excluding, the date of redemption. At any time prior to February 1, 2018, the Company may redeem the Notes, in whole or in part, at a redemption price equal to 100.0 percent of the principal amount of such Notes redeemed plus a “make-whole” premium (as described in the Indenture), together with any accrued and unpaid interest, if any, to, but excluding, the date of redemption. Upon the occurrence of a change of control of the Company (as described in the Indenture), the Company must offer to repurchase the Notes at 101 percent of the principal amount of the Notes, plus accrued and unpaid interest, if any, to, but excluding, the date of repurchase. Under the terms of the 2013 Credit Agreement, the $800,000 secured revolving credit facility was reduced to $700,000 as a result of the $400,000 Notes offering. The Company used the net proceeds of this offering to repay the outstanding amount under the revolving portion of its 2013 Credit Agreement and to pay related fees and expenses and for general corporate purposes. 2013 Credit Agreement On January 18, 2013, the Company entered into the 2013 Credit Agreement, among the Company, as borrower, WEX Card Holdings Australia Pty Ltd, a wholly-owned subsidiary of the Company, as specified designated borrower, Bank of America, N.A., as administrative agent and letter of credit issuer, and the other lenders party thereto. The 2013 Credit Agreement provided for a five -year $300,000 term loan facility, and a five -year $800,000 secured revolving credit facility with a $150,000 sub-limit for letters of credit. The indebtedness covenant under the 2013 Credit Agreement required that the Company reduce the revolving commitments under the 2013 Credit Agreement on a dollar-for-dollar basis to the extent that the Company issues more than $300,000 in principal amount of senior or senior subordinated notes of the Company. Subject to certain conditions, including obtaining relevant commitments, the Company had the option to increase the facility by up to an additional $100,000 . The 2013 Credit Agreement amended, restated and substituted for the 2011 Credit Agreement. The 2013 Credit Agreement increased the outstanding amount of the term loan from $185,000 to $300,000 and increased the amount of the revolving loan from $700,000 to $800,000 . A portion of the indebtedness owing under the 2013 Credit Agreement was the same indebtedness as formerly evidenced by the 2011 Credit Agreement. The 2013 Credit Agreement would have matured in January 2018, unless extended pursuant to the terms of the 2013 Credit Agreement. Australian Securitization Facility On April 28, 2015, the Company entered into a one year securitized debt agreement with the Bank of Tokyo-Mitsubishi UFJ, Ltd. In April 2016, this agreement was extended for one year . 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 2.65 percent and 2.91 percent as of December 31, 2016 and 2015 , respectively. The Company had securitized debt under this facility of $78,592 and $82,018 as of December 31, 2016 and 2015 , 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 Company had $5,731 of securitized debt under this facility as of December 31, 2016 at an interest rate of 0.95% percent. Debt Commitments The table below summarizes the Company's annual principal payments on long-term debt for each of the next five fiscal years: 2017 $ 34,750 2018 34,750 2019 34,750 2020 34,750 2021 $ 364,625 Debt Issuance Costs The Company capitalized approximately $49,810 of debt issuance costs, including an original issue discount of $12,000 associated with the 2016 Credit Agreement. Additionally, the Company expensed approximately $5,056 during the third quarter of 2016 related to noncapitalizable third-party costs incurred in connection with the modification of the certain 2014 Credit Agreement syndicate loans. These debt issuance costs will be amortized into interest expense over the 2016 Credit Agreement's term using the effective interest method for the tranche A and B term loans and the revolver. The Company recognized a loss of $2,018 associated with the early extinguishment of the 2014 Credit Agreement during the year ended December 31, 2016, including a partial write-off of previously capitalized debt issuance costs and newly paid lender fees associated with the extinguishment of syndicate borrowings. In January 2016, the Company began to incur ticking fees for the debt financing commitment associated with the 2016 Credit Agreement in anticipation of the then pending acquisition of EFS. Pursuant to the terms set forth in the bank commitment letter, the ticking fees were calculated based on the financing commitment in the aggregate amount of $2,125,000 , and remained in place until the closing of the EFS acquisition on July 1, 2016 (see Note 3, Business Acquisitions and Other Intangible Asset Acquisitions). Total ticking fees expensed to financing interest were $30,045 for the year ended December 31, 2016. In conjunction with the continued negotiation of the Company's new credit agreement, the amount of ticking fees to be paid at the time of closing was reduced by $7,874 to $22,171 . The excess ticking fees were reflected as a reduction of the $49,810 debt issuance costs related to the 2016 Credit Agreement noted above and will be amortized over the 2016 Credit Agreement's term using the effective interest method for the tranche A and B term loans and the revolver. The following table presents the Company's net debt issuance costs related to its revolving line-of-credit facilities, term loans and notes outstanding: Year ended December 31, 2016 2015 Revolving line of credit facilities and term loans $ 38,334 $ 4,837 Notes outstanding $ 4,466 $ 5,200 Other As of December 31, 2016 , WEX Bank pledged approximately $313,670 of fleet receivables held by WEX Bank to the Federal Reserve Bank as collateral for potential borrowings, through the Federal Reserve Bank Discount Window. Amounts that can be borrowed are based on the amount of collateral pledged to the Federal Reserve Bank and were approximately $237,698 as of December 31, 2016 . WEX Bank had no borrowings on this line of credit through the Federal Reserve Bank Discount Window as of December 31, 2016 .

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income (losses) before income taxes consisted of the following: Year ended December 31, 2016 2015 2014 United States $ 32,622 $ 203,692 $ 329,633 Foreign 54,479 (18,784 ) (27,994 ) Total $ 87,101 $ 184,908 $ 301,639 Income tax expense (benefit) from continuing operations consisted of the following for the years ended December 31: United States State Foreign Total 2016 Current $ (1,232 ) $ 3,033 $ 8,325 $ 10,126 Deferred $ 21,565 $ (5,106 ) $ 3,040 $ 19,499 2015 Current $ 22,570 $ 4,288 $ 9,173 $ 36,031 Deferred $ 37,553 $ 5,631 $ (3,919 ) $ 39,265 2014 Current $ 43,565 $ 3,326 $ 8,009 $ 54,900 Deferred $ 51,581 $ 3,979 $ (8,839 ) $ 46,721 The reconciliation between the income tax computed by applying the U.S. federal statutory rate and the reported effective tax rate on income from continuing operations is as follows: Year ended December 31, 2016 2015 2014 Federal statutory rate 35.0 % 35.0 % 35.0 % State income taxes (net of federal income tax benefit) 1.1 2.5 1.6 Foreign income tax rate differential (4.4 ) 1.4 1.1 Revaluation of deferred tax assets for tax rate changes and blending differences, net (0.9 ) 0.7 (0.1 ) Research and development credit (0.5 ) 0.2 (0.6 ) Release of tax reserves (4.9 ) — — Withholding taxes 0.3 — — Domestic production exclusions — (1.8 ) (4.0 ) Change in valuation allowance 2.3 1.6 0.1 Nondeductible expenses 3.4 0.3 — Other 2.6 0.8 0.6 Effective tax rate 34.0 % 40.7 % 33.7 % Our effective tax rate was 34.0 percent for 2016 as compared to 40.7 percent for 2015. The change in our tax rate reflects a shift in jurisdictional profitability between 2015 and 2016. Increased profits in 2016 within tax jurisdictions with tax rates lower than the United States resulted in a reduction to our effective tax rate. Our 2016 tax rate reflects the release of certain historical foreign reserve positions in Australia, primarily driven by a lapse of statute, as well as a reduction in our domestic production activities deduction as a result of lower taxable income in the United States. The tax effects of temporary differences in the recognition of income and expense for tax and financial reporting purposes that give rise to significant portions of the deferred tax assets and the deferred tax liabilities are presented below: December 31, 2016 2015 Deferred assets related to: Reserve for credit losses $ 7,122 $ 5,310 Tax credit carryforwards 5,178 4,686 Stock-based compensation, net 12,729 9,150 Net operating loss carryforwards 56,501 22,797 Pension 944 — Accruals 23,461 5,992 Unrealized losses 164 2,647 Total 106,099 50,582 Deferred tax liabilities related to: Unrealized gains — 1,876 Other liabilities 643 1,226 Property, equipment and capitalized software 32,759 20,861 Intangibles, net 118,695 94,814 Investment in partnership 94,354 — Pension — 600 Total 246,451 119,377 Valuation allowance primarily on net operating loss carryforwards 5,620 4,814 Deferred income taxes, net $ (145,972 ) $ (73,609 ) Net deferred tax (liabilities) assets by jurisdiction are as follows: December 31, 2016 2015 United States $ (148,389 ) $ (76,308 ) Australia (2,020 ) (6,153 ) New Zealand 183 252 The Netherlands 206 230 United Kingdom 6,474 9,623 Brazil (2,497 ) (1,253 ) Canada 71 — Total $ (145,972 ) $ (73,609 ) The deferred tax assets and deferred tax liabilities are included in deferred income taxes, net on the consolidated balance sheets where a right of offset exists. The Company’s primary tax jurisdictions are the United States, Australia and the United Kingdom. The Company had approximately $211,010 of post apportionment state, $103,739 of federal and $54,062 of foreign net operating loss carry forwards at December 31, 2016 and approximately $102,483 of post apportionment state, $10,072 of federal and $69,762 of foreign net operating loss carry forwards at December 31, 2015 . The 2016 increase is a result of the EFS acquisition which included a corporation carrying forward state and federal net operating losses. The U.S. losses expire at various times through 2035 . Foreign losses in Brazil and the UK have indefinite carry forward periods. The Company has established valuation allowances for the following items: (i) acquired net operating losses in the UK (ii) Evolution1’s equity investment in its minority-owned subsidiaries, (iii) state tax credits, and (iv) certain net operating losses and estimated non-deductible expenses. During 2016 and 2015, the Company recorded tax expense of $2,000 and $2,888 , respectively, for net increases to the valuation allowance. In each case the Company has determined it is more likely than not that the benefits will not be utilized. No other valuation allowances have been established for any other deferred tax assets as the Company believes it is more likely than not that its deferred tax assets will be utilized within the carry forward periods. The Company has not finalized the purchase accounting for the acquisition of EFS. Undistributed earnings of certain foreign subsidiaries of the Company amounted to $25,824 and $13,230 at December 31, 2016 and 2015 , 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. Current accounting guidance prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. This accounting guidance also provides guidance on derecognition, classification, interest and penalties, accounting in the interim periods, disclosure, and transition. The Company or one of its subsidiaries files income tax returns in the United States federal jurisdiction and various state and foreign jurisdictions, where required. In the normal course of business, the Company is no longer subject to income tax examination after the Internal Revenue Service statute of limitations of three years. However, as extensions are in place, the Internal Revenue Service is currently in the process of examining the Company’s US federal income tax returns for 2010, 2011 and 2012. The Company is currently appealing adjustments proposed by the Internal Revenue Service in connection with the ongoing audits. The Company is also subject to an ongoing examination in New Zealand by Inland Revenue for calendar tax years 2012 and 2013. A reconciliation of the beginning and ending amount of unrecognized tax benefits excluding interest and penalties is as follows: Year ended December 31, 2016 2015 2014 Beginning balance $ 4,776 $ 4,856 $ 5,283 Increases related to prior year tax positions 4,960 431 — Decreases related to prior year tax positions, due to foreign currency exchange — (511 ) (427 ) Decreases related to prior year tax positions (431 ) — — Lapse of statute (4,345 ) — — Ending balance $ 4,960 $ 4,776 $ 4,856 At December 31, 2016 , the Company had $4,960 of net unrecognized tax benefits. If recognized, the $4,960 in net unrecognized tax benefits would reduce the Company’s effective tax rate. The Company anticipates settling a portion of the unrecognized tax benefit within the next 12 months . The Company recognizes interest and penalties related to unrecognized tax benefits in income tax expense. The Company did not accrue an amount in 2016 for penalties and interest related to uncertain tax positions. The Company accrued $2,251 and $1,988 as of December 31, 2015 and 2014 , respectively, for penalties and interest related to uncertain tax positions.

Tax Receivable Agreement

Tax Receivable Agreement	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Tax Receivable Agreement	Tax Receivable Agreement As a consequence of the Company’s separation from its former parent company in 2005, the tax basis of the Company’s net tangible and intangible assets increased (the “Tax Basis Increase”). The Tax Basis Increase reduced the amount of tax that the Company would pay in the future to the extent the Company generated taxable income in sufficient amounts. The Company was contractually obligated, pursuant to its 2005 Tax Receivable Agreement with the Company’s former parent company (Cendant Corporation), to remit 85 percent of any such cash savings. The estimated total payments owed to Cendant Corporation based on facts available at that time, was reflected as a liability titled “Amounts due under tax receivable agreement.” The amount of these estimated future payments is dependent upon future statutory tax rates and the Company’s ability to generate sufficient taxable income adequate to cover the tax depreciation, amortization and interest expense associated with the Tax Basis Increase. Estimated blended tax rates are impacted by a number of factors including tax law changes, statutory tax rate changes, state apportionment and state filing combinations. The Company regularly reviews its estimated blended tax rates and projections of future taxable earnings to determine whether changes in the estimated liability are required. Any changes to the estimated future payments due to changes in estimated blended tax rates are recorded in the income statement as changes in amounts due under tax receivable agreement. Pursuant to the Separation and Distribution Agreement dated as of July 27, 2006, by and among Cendant Corporation (now known as Avis Budget Group, Inc. or “Avis”), Realogy Corporation (“Realogy”), Wyndham Worldwide Corporation (“Wyndham”) and Travelport Inc., Realogy acquired from Cendant the right to receive 62.5 percent of the payments by WEX Inc. to Cendant and Wyndham acquired from Cendant the right to receive 37.5 percent of the payments by WEX Inc. to Cendant under the 2005 Tax Receivable Agreement. On June 26, 2009, the Company entered into a Tax Receivable Prepayment Agreement with Realogy, pursuant to which the Company paid Realogy $51,000 , net of bank fees and legal expenses, as prepayment in full to settle the remaining obligations to Realogy under the 2005 Tax Receivable Agreement. In connection with the Tax Receivable Prepayment Agreement with Realogy, the Company entered into a Ratification Agreement on June 26, 2009 (the “Ratification Agreement”) with Avis, Realogy and Wyndham which amended the 2005 Tax Receivable Agreement to require the Company to pay 31.875 percent of the future tax savings related to the Tax Basis Increase to Wyndham. For each year presented, there has been a reassessment of the blended tax rates that are projected into the future. For the year ended December 31, 2016 , the net future benefits increased, which increased the associated liability to Wyndham, resulting in a charge to non-operating expense of $563 . In addition, the liability decreased due to payments of $10,797 made during the year ended December 31, 2016. For the year ended December 31, 2015, the net future benefits decreased, which decreased the associated liability to Wyndham, resulting in a $2,145 offset to non-operating expense. For the year ended December 31, 2014, the net future benefits increased, which increased the associated liability to Wyndham, resulting in a charge to non-operating expense of $1,331 .

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company sponsors a 401(k) retirement and savings plan. Eligible employees may participate in the plan immediately. The Company’s employees who are at least 18 years of age, have worked at least 1000 hours in the past year, and have completed one year of service are eligible for Company matching contributions in the plan. The Company matches 100 percent of each employee’s contributions up to a maximum of 6 percent of each employee’s eligible compensation. All contributions vest immediately. WEX Inc. has the right to discontinue the plan at any time. Contributions to the plan are voluntary. The Company contributed $5,297 , $4,571 and $3,502 in matching funds to the plan for the years ended December 31, 2016 , 2015 and 2014 , respectively. During 2016, the Company acquired EFS, which as of the date of the acquisition had its own employee savings plan ("the EFS Plan"). As of December 31, 2016, the EFS Plan was merged with the existing WEX plan, and the existing plan recorded a receivable for the amount of net assets available for benefits expected to be received from the EFS Plan. On February 1, 2017, the WEX plan received net assets available for benefits totaling $15,159 in a transfer from the EFS Plan. On January 1, 2017, EFS employees became eligible to participate in the existing WEX plan. During 2014, the Company acquired Evolution1 which, as of the date of the acquisition, had its own employee savings plan, the Evolution1 Plan. As of December 31, 2014, the Evolution1 Plan was merged with the existing WEX plan, and the existing plan recorded a receivable for the amount of net assets available for benefits it expected to receive from the Evolution1 Plan. Net assets available for benefits totaling $21,739 were received by the plan on January 2, 2015, in a transfer from the Evolution1 Plan. On January 1, 2015, Evolution1 employees became eligible to participate in the existing WEX plan. The Company also sponsors a defined contribution plan for certain employees designated by the Company. Participants may elect to defer receipt of designated percentages or amounts of their compensation. The Company maintains a grantor’s trust to hold the assets under the Company’s defined contribution plan. The obligation related to the defined contribution plan totaled $5,673 and $5,655 at December 31, 2016 and 2015 , respectively, and are included in Other liabilities on the consolidated balance sheets. The assets held in trust are designated as trading securities and, as such, these trading securities are to be recorded at fair value with any changes recorded currently to earnings. The aggregate market value of the securities within the trust was $5,673 and $5,655 at December 31, 2016 and 2015 , respectively, and are included in Other assets on the consolidated balance sheets. The Company has defined benefit pension plans in Germany and Norway. The total net unfunded status for the Company’s foreign defined benefit pension plans, recognized as accrued expenses in the consolidated balance sheets, were $5,979 and $4,406 as of December 31, 2016 and 2015 , respectively. The Company will measure these plan obligations on an annual basis. The change in fair value to the defined benefit pension plans is recorded through the consolidated statements of income. The expense under each of these defined benefit pension plans for 2016 and 2015 was not material to the consolidated financial statements.

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Fair Value	Fair Value The Company holds mortgage-backed securities, fixed income securities, derivatives (see Note 11, Derivative Instruments) and certain other financial instruments which are carried at fair value. The Company determines fair value based upon quoted prices when available or through the use of alternative approaches, such as model pricing, when market quotes are not readily accessible or available. In determining the fair value of the Company’s obligations, various factors are considered including: closing exchange or over-the-counter market price quotations; time value and volatility factors underlying options and derivatives; price activity for equivalent instruments; and the Company’s own-credit standing. These valuation techniques may be based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs create the following fair value hierarchy: • Level 1 – Quoted prices for identical instruments in active markets. • Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. • Level 3 – Instruments whose significant value drivers are unobservable. 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, Level 2, or Level 3 of the fair value hierarchy during either of the years ended December 31, 2016 and 2015 . The following table presents the Company’s assets and liabilities that are measured at fair value and the related hierarchy levels for 2016 and 2015 : December 31, Fair Value Hierarchy 2016 2015 Assets: Mortgage-backed securities 2 $ 490 $ 650 Asset-backed securities 2 648 848 Municipal bonds 2 682 398 Equity securities 1 21,705 16,666 Total available-for-sale securities $ 23,525 $ 18,562 Executive deferred compensation plan trust (a) 1 $ 5,673 $ 5,655 Fuel price derivatives – unleaded fuel (b) 2 $ — $ 3,083 Fuel price derivatives – diesel (b) 3 — 1,924 Total fuel price derivatives $ — $ 5,007 Interest rate swaps (a) 2 $ 12,908 $ — Foreign currency swaps (c) 2 $ 29 $ — Liabilities: Foreign currency swaps (d) 2 $ — $ 90 (a) The fair value of these instruments is recorded in Other assets. (b) The consolidated balance sheet presentation combines unleaded fuel and diesel fuel positions. (c) The fair value of these instruments is recorded in Accounts receivable. (d) The fair value of these instruments is recorded in Accounts payable. Available-for-sale Securities and Executive Deferred Compensation Plan Trust When available, the Company uses quoted market prices to determine the fair value of available-for-sale securities; such items are classified in Level 1 of the fair-value hierarchy. These securities primarily consist of 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 bonds, the Company generally uses quoted prices for recent trading activity of assets with similar characteristics to the debt security or bond being valued. The securities and bonds priced using such methods are generally classified as Level 2. The obligations related to the deferred compensation plan trust are classified as Level 1 in the fair value hierarchy because the fair value is determined using quoted prices for identical instruments in active markets. $400 Million Notes Outstanding Not considering unamortized loan origination fees, the Notes outstanding have a carrying value of $400,000 and a fair value of $390,000 as of December 31, 2016 and a carrying value of $400,000 and fair value of $366,000 as of December 31, 2015 . The fair value is based on market rates for the issuance of our debt. The Company determined the fair value of its Notes outstanding are classified as Level 2 in the fair value hierarchy. Foreign Currency Contracts Derivatives include foreign currency forward and swap contracts. Our foreign currency forward and swap contracts are valued using an income approach (Level 2) based on the spot rate less the contract rate multiplied by the notional amount. We consider counterparty credit risk in the valuation of the Company's derivatives. This credit risk did not have a material impact on the valuation of the Company's derivatives during 2016 and 2015 . Fuel Price Derivatives The majority of derivatives entered into by the Company were executed over-the-counter and were valued using internal valuation techniques as no quoted market prices exist for such instruments. The valuation technique and inputs depended on the type of derivative and the nature of the underlying instrument. The principal technique used to value these instruments was a comparison of the spot price of the underlying instrument to its related futures curve adjusted for the Company’s assumptions of volatility and present value, where appropriate. The fair values of derivative contracts reflected the expected cash the Company would pay or receive upon settlement of the respective contracts. After the first quarter of 2016, the Company no longer holds any fuel price derivatives. The key inputs depended upon the type of derivative and the nature of the underlying instrument and include interest rate yield curves, the spot price of the underlying instrument, volatility, and correlation. The item was placed in either Level 2 or Level 3 depending on the observability of the significant inputs to the model. Correlation and items with longer tenures were generally less observable. Significant Unobservable Inputs The assumptions used in the valuation of the diesel fuel price derivatives used both observable and unobservable inputs. There is a lack of price transparency with respect to forward prices for diesel fuel. Such unobservable inputs were significant to the diesel fuel derivative contact valuation methodology. The significant unobservable inputs used in the fair value measurement of the Company’s diesel fuel price derivative instruments designated as Level 3 were as follows: Fair Value at Valuation Technique Unobservable Input Range $ per gallon Fuel price derivatives – diesel $ 1,924 Option model Future retail price of diesel 3.72 – 3.78 The following table presents a reconciliation of the beginning and ending balances for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the years ended December 31, 2016 and 2015: December 31, Fuel Price Derivatives – Diesel 2016 2015 Beginning balance $ 1,924 $ 11,848 Total gains or (losses) – realized/unrealized Included in earnings (a) (1,924 ) (9,924 ) Ending balance $ — $ 1,924 (a) Gains and losses for the years ended December 31, 2016 and 2015, are reported in Net realized and unrealized gains and (losses) on fuel price derivatives in the consolidated statements of income. Interest Rate Swap Arrangements We determine the fair value of our interest rate swaps based on the discounted cash flows of the difference between the projected fixed payments on the swap and the implied floating payments using the current LIBOR curve, which are Level 2 inputs in the fair value hierarchy. Debt We determine the fair value of the amount outstanding under our 2016 Credit Facility based on the market rates for the issuance of the Company's debt which are Level 2 inputs in the fair value hierarchy. The fair value of amounts outstanding under the 2016 Credit Facility approximate the carrying value.

Non-controlling Interest

Non-controlling Interest	12 Months Ended
	Dec. 31, 2016
Noncontrolling Interest [Abstract]
Non-controlling interest	Non-controlling interest On August 30, 2012, the Company acquired a 51 percent ownership interest in UNIK. The redeemable non-controlling interest was measured at fair value at the date of acquisition and was reported on the Company’s consolidated balance sheets as “Redeemable non-controlling interest." On August 31, 2015, the Company acquired the remaining 49 percent ownership in UNIK for $46,018 . Due to put rights held by the non-controlling shareholders after the Company's original investment, the non-controlling interest was previously reported as a liability rather than permanent equity. The Company agreed to cancel this put option in conjunction with the acquisition of the remaining 49 percent ownership. The value of the redeemable non-controlling interest was adjusted to the redemption value at date of purchase and the Company recorded the adjustment to retained earnings. This adjustment to retained earnings reduces the Earnings Per Share to shareholders. The Company recorded the amount paid in excess of the redemption value in additional paid-in capital and the impact related to foreign currency in accumulated other comprehensive income. The Company's overall purchase price was less than the fair value of UNIK. A reconciliation of redeemable non-controlling interest for the year ended December 31, 2015 , is as follows: Beginning balance $ 16,590 Net income attributable to redeemable non-controlling interest 1,190 Currency translation adjustment (4,210 ) Accretion to redemption value 9,413 Excess purchase amount over redemption value 23,035 Purchase of non-controlling interest (46,018 ) Ending balance $ — On December 1, 2014, WEX acquired the assets of ExxonMobil's Esso portfolio in Europe through its majority owned subsidiary, WEX Europe Services Limited. The Company formed this entity during 2013 and has 75 percent ownership. A reconciliation of non-controlling interest for the years ended December 31, 2016 and 2015 is as follows: 2016 2015 Beginning balance $ 12,437 $ 17,396 Net loss attributable to non-controlling interest (3,161 ) (2,896 ) Currency translation adjustment (718 ) (2,063 ) Ending balance $ 8,558 $ 12,437

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation The Company is involved in pending litigation in the ordinary course of business. In the opinion of management, such litigation will not have a material effect on the Company’s consolidated financial position, results of operations or cash flows. Legal Matters 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, Company’s wholly-owned subsidiary. A mediation related to this dispute is also expected to occur. The Company is currently conducting an internal review of this matter and intends to vigorously defend itself. The current estimate of a reasonably possible loss contingency is not material to the Company's consolidated financial position, results of operations or cash flows. Extension of Credit to Customers The Company had aggregate unused commitments of approximately $5,421,000 and $6,229,000 at December 31, 2016 and 2015 , respectively, related to payment processing services, primarily related to commitments to extend credit to customers and customers of strategic relationships as part of the Company’s established lending product agreements. Many of these commitments are not expected to be used; therefore, total unused credit available to customers and customers of strategic relationships does not represent future cash requirements. The Company can increase or decrease its customers’ credit lines at its discretion at any time, subject to limited notice requirements in some instances. These amounts are not recorded on the consolidated balance sheets. Operating Leases The Company leases office space and equipment under non-cancelable operating lease agreements that expire at various dates through 2026. In addition, the Company rents office equipment under agreements that may be canceled at any time. Rental expense related to office space, equipment, and vehicle leases amounted to $15,104 , $11,310 and $8,838 for the years ended December 31, 2016 , 2015 and 2014 , respectively. These amounts were included in occupancy and equipment on the consolidated statements of income. The Company leases information technology hardware and software under agreements that may be terminated by the Company at any time. Lease and rental expense related to information technology hardware and software leases totaled $12,875 , $11,288 and $9,852 for the years ended December 31, 2016 , 2015 and 2014 , respectively. These amounts were included in technology leasing and support on the consolidated statements of income. Future minimum lease payments under non-cancelable operating leases are as follows: 2017 $ 11,495 2018 9,276 2019 6,429 2020 5,354 2021 4,593 Thereafter 14,924 Total minimum lease payments $ 52,071 Minimum Volume Purchase Commitments One of the Company's subsidiaries is required to purchase a minimum amount of fuel from suppliers on an annual basis through 2024. Should we fail to meet these minimum volume commitments, the Company will be assessed a penalty as defined under the contracts. If the Company does not purchase fuel under these commitments after December 31, 2016, we would incur annual penalties through 2024 totaling approximately $1,301,675 . During the years ended December 31, 2016, 2015 and 2014, we did not incur material shortfall penalties under these contracts. The Company considers the associated risk of loss to be remote based on current operations.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	12 Months Ended
	Dec. 31, 2016
Equity [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss A reconciliation of accumulated other comprehensive loss for the years ended December 31, 2016 and 2015 , is as follows: 2016 2015 Unrealized Losses on Available- for-Sale Securities Foreign Currency Items Unrealized Losses on Available- for-Sale Securities Foreign Currency Items Beginning balance $ (212 ) $ (103,239 ) $ (129 ) $ (50,452 ) Other comprehensive loss (251 ) (19,137 ) (83 ) (43,679 ) Purchase of redeemable non-controlling interest — — — (9,108 ) Ending balance $ (463 ) $ (122,376 ) $ (212 ) $ (103,239 ) No significant amounts were reclassified from accumulated other comprehensive loss in the periods presented. The change in foreign currency items is primarily due to the foreign currency translation of non-cash assets such as goodwill and other intangible assets related to the Company's foreign subsidiaries. The total tax effect on accumulated unrealized loss was $5,416 and $2,647 as of December 31, 2016 and 2015 , respectively.

Dividend Restrictions

Dividend Restrictions	12 Months Ended
	Dec. 31, 2016
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Dividend Restrictions	Dividend Restrictions The Company has certain restrictions on the dividends it may pay under its revolving credit agreement, including pro forma compliance with a ratio of consolidated funded indebtedness to consolidated EBITDA of 2.50 :1.00 for the most recent period of four fiscal quarters. However, if the Company's leverage ratio does not exceed 5.25 through September 30, 2017, 5.00 through September 30, 2018, 4.25 through September 30, 2019, or 4.00 from December 31, 2019 and thereafter, after execution of a restricted payment, the Company may pay $50,000 per annum for restricted payments, including dividends, of which 100% of unused amounts may be carried over into subsequent years. The Company has not declared any dividends on its common stock since it commenced trading on the NYSE on February 16, 2005. Dividends paid by WEX Bank have provided a substantial part of the Company’s operating funds and for the foreseeable future it is anticipated that dividends paid by WEX Bank will continue to be a source of operating funds to the Company. Capital adequacy requirements serve to limit the amount of dividends that may be paid by WEX Bank. WEX Bank is chartered under the laws of the State of Utah and the FDIC insures its deposits. Under Utah law, WEX Bank may only pay a dividend out of net profits after it has (i) provided for all expenses, losses, interest and taxes accrued or due from WEX Bank and (ii) transferred to a surplus fund 10 percent of its net profits before dividends for the period covered by the dividend, until the surplus reaches 100 percent of its capital stock. For purposes of these Utah dividend limitations, WEX Bank’s capital stock is $5,250 and its capital surplus exceeds 100 percent of capital stock. Under FDIC regulations, WEX Bank may not pay any dividend if, following the payment of the dividend, WEX Bank would be “undercapitalized,” as defined under the Federal Deposit Insurance Act and applicable regulations. The FDIC also has the authority to prohibit WEX Bank from engaging in business practices that the FDIC considers to be unsafe or unsound, which, depending on the financial condition of WEX Bank, could include the payment of dividends. WEX Bank complied with the aforementioned dividend restrictions for each of the years ended December 31, 2016 , 2015 , and 2014 .

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Stock-Based Compensation In 2010, the Company adopted the WEX Inc. 2010 Equity Incentive Plan (the “Plan”). This Plan replaced the Company’s 2005 Equity and Incentive Plan. In May 2015, the Company adopted the 2015 Section 162(m) Performance Incentive Plan (collectively the "Plans"). These Plans, which are stockholder-approved, permit the grant of stock options, stock appreciation rights, restricted stock, restricted stock units and other stock-based or cash-based awards to non-employee directors, officers, employees, advisors or consultants for the sum of 3,800 shares of common stock and such additional number of shares of common stock (up to 1,596 ) as is equal to the number of shares of common stock reserved for issuance under the Company’s Amended and Restated 2005 Equity and Incentive Plan (the “Prior Plan”) that remained available for grant under the Prior Plan immediately prior to the Board of Directors’ approval of the 2010 Plan and the number of shares of common stock subject to awards under the Prior Plan which awards expire, terminate or are otherwise surrendered, canceled, forfeited or repurchased by the Company at their original issuance price pursuant to a contractual repurchase right. On December 31, 2016 , the Company had four stock-based compensation programs, which are described below. The compensation cost that has been charged against income for these programs totals $19,742 , $12,420 and $13,790 for 2016 , 2015 and 2014 , respectively. The associated tax benefit related to these costs was $7,200 , $4,542 and $4,983 , for 2016 , 2015 , and 2014 , respectively. There were 2,645,987 units of common stock available for grant for future equity-incentive compensation awards under the plan at December 31, 2016 . Restricted Stock Units The Company awards restricted stock units (“RSU”) to non-employee directors and certain employees periodically under the Plan. An RSU is a right granted to receive stock at the end of a specified period. RSU awards generally vest evenly over a period of three years. The awards provide for accelerated vesting if there is a change of control (as defined in the Plan). The fair value of each RSU award is based on the closing market price of the Company’s stock on the day of grant as reported by the New York Stock Exchange (“NYSE”). A summary of the status of the Company’s RSUs as of December 31, 2016 , and changes during the year then ended is presented below: Units Weighted- Average per share Grant- Date Fair Value Restricted Stock Units Balance at January 1, 2016 99 $ 94.51 Granted 209 90.24 Vested – shares issued (61 ) 94.93 Vested – shares deferred (a) (2 ) 87.08 Forfeited (11 ) 87.22 Withheld for taxes (b) (28 ) 96.40 Balance at December 31, 2016 206 $ 88.78 (a) The Company issued fully vested and non-forfeitable restricted stock units to certain non-employee directors and certain employees that are payable in shares of the Company’s common stock at a later date as specified by the award (deferred stock units or “DSUs”). (b) The Company withholds shares of common stock to pay the minimum required statutory taxes due upon RSU vesting. Cash is then remitted by the Company to the appropriate taxing authority. As of December 31, 2016 , there was $9,037 of total unrecognized compensation cost related to nonvested share-based compensation arrangements granted as RSUs. That cost is expected to be recognized over a weighted-average period of 1.3 years . The total grant-date fair value of shares granted was $18,826 , $7,846 and $7,376 during 2016 , 2015 and 2014 , respectively. The total fair value of shares vested was $3,648 , $4,521 and $8,545 during 2016 , 2015 and 2014 , respectively. Deferred Stock Units Under the Plan, the Company also grants deferred stock units (“DSU”) to non-employee directors. A DSU is a fully vested right to receive stock at a certain point in time in the future. DSUs do not require any future service or performance obligations to be met. DSUs may be granted immediately or may initially be granted as RSUs which become DSUs once a previously determined service obligation has been met. The fair value of each granted DSU award is based on the closing market price of the Company’s stock on the grant date as reported by the NYSE. A summary of the status of the Company’s DSUs as of December 31, 2016 , and changes during the year is presented below: Units Weighted- Average per share Grant-Date Fair Value Deferred Stock Units Balance at January 1, 2016 98 $ 30.59 Awards 1 84.52 Converted from RSUs 2 87.08 Balance at December 31, 2016 101 $ 32.12 There is no unrecognized compensation cost related to awards granted as, or converted to, DSUs. The Company has determined that the award is earned when granted and it is expensed at that time. The total fair value of shares granted and vested was $238 , $363 and $189 during 2016 , 2015 and 2014 , respectively. Performance Based Restricted Stock Units The Company also awards performance based restricted stock units (“PBRSUs”) to employees periodically under the Plan. A PBRSU is a right granted to receive stock at the end of a specified period. In a PBRSU, the number of shares earned varies based upon meeting certain performance goals. PBRSU awards generally have performance goals tracking a one to three year period, depending on the nature of the performance goal. The fair value of each PBRSU award is based on the closing market price of the Company’s stock on the grant date as reported by the NYSE. A summary of the status of certain of the Company’s PBRSUs at threshold and target performance as of December 31, 2016 , and changes during the year then ended is presented below: Units at Threshold Units at Target Units at Maximum Weighted- Average per share Grant-Date Fair Value Performance Based Restricted Stock Units Balance at January 1, 2016 71 188 363 $ 96.16 Granted 95 197 389 80.84 Forfeited / Canceled (4 ) (10 ) (19 ) 85.46 Converted to RSUs (40 ) (65 ) (119 ) 105.30 Balance at December 31, 2016 122 310 614 $ 84.83 The range of unrecognized compensation cost related to the PBRSU awards is from $5,107 at threshold (below target performance), $10,835 at target and up to $21,450 at maximum (above target performance), as of December 31, 2016 , depending on whether certain performance conditions are met. That cost is expected to be recognized over a weighted-average period of 1.6 years . The total grant-date fair value of shares granted at target was $15,921 , $6,860 and $19,239 during 2016 , 2015 and 2014 , respectively. The total grant-date fair value of shares converted to RSUs and subsequently vested was $4,858 , $2,035 and $2,474 during 2016 , 2015 and 2014 , respectively. Stock Options The fair value of each option award is estimated on the grant date using the following assumptions and a Black-Scholes-Merton option-pricing model. The expected term assumption as it relates to the valuation of the options represents the period of time that options granted are expected to be outstanding. The Company also estimates expected volatilities that are based on implied volatilities from traded options on the Company's stock, historical volatility of the Company’s stock, and other factors. The option-pricing model includes a risk-free interest rate for the period matching the expected term of the option and is based on the U.S. Treasury yield curve in effect at the time of the grant. The dividend yield used in the option-pricing model is the calculated yield on the Company’s stock at the time of the grant. On March 15, 2016, March 15, 2015, and August 31, 2015, the Company approved the grant of stock options to certain officers and employees under the 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. Based on the Company's lack of historical option exercise experience and granting of stock options with "plain vanilla" characteristics, the Company uses the simplified method to estimate the expected term of its employee stock options. The table below summarizes the assumptions used to calculate the fair value: March 15, 2016 March 15, 2015 August 31, 2015 Weighted average expected life (in years) 6.0 6.0 5.77 Weighted average exercise price $ 77.20 $ 103.75 $ 94.53 Weighted average volatility 31.93 % 30.53 % 28.73 % Weighted average risk-free rate 1.62 % 1.73 % 1.66 % Weighted average fair value $ 26.14 $ 34.13 $ 28.90 The stock options granted under the plan related to the Company’s employees consisted of: Shares Weighted- Average per share Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Stock Options Outstanding at January 1, 2016 81 $ 71.50 Granted 126 77.20 Exercised (22 ) 13.96 Forfeited or expired (5 ) 87.38 Outstanding at December 31, 2016 180 $ 81.90 8.57 $ 5,347 Exercisable on December 31, 2016 23 $ 75.58 5.69 $ 833 Vested and expected to vest at December 31, 2016 172 $ 82.00 8.54 $ 5,081 As of December 31, 2016 , there was $2,865 of total unrecognized compensation cost related to these options. That cost is expected to be recognized over a weighted-average period of 1.4 years . The total intrinsic value of options exercised during the years ended December 31, 2016 , 2015 and 2014 was $1,712 , $216 and $1,543 , respectively. The total grant-date fair value of shares granted was $3,297 and $1,855 during 2016 and 2015 , respectively. There were no options granted during 2014.

Restructuring

Restructuring	12 Months Ended
	Dec. 31, 2016
Restructuring and Related Activities [Abstract]
Restructuring	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 that the amount of expenses related to these initiatives are probable and reasonably estimable and has recorded the impact on the consolidated statements of income and in Accrued expenses on the consolidated balance sheets. Restructuring charges incurred to date under these initiatives were $17,340 as of December 31, 2016. The balance under the 2015 Restructuring Initiative is expected to be paid through 2018. Amounts under the 2016 Restructuring Initiative and the Acquisition Integration Restructuring Initiative are expected to be paid through 2017. The Company expects to incur an additional $300 in restructuring costs related to the 2015 Restructuring Initiative, an additional $300 in restructuring costs related to the 2016 Restructuring Initiative and an additional $600 in restructuring costs related to the Acquisition Integration Restructuring Initiative. The following table presents the Company's 2015 Restructuring Initiative liability for the years ended December 31, 2016 and 2015 : 2016 2015 Beginning balance $ 7,249 $ — Restructuring charges 2,182 9,038 Reserve release (816 ) (28 ) Cash paid (3,921 ) (1,433 ) Other (166 ) — Impact of foreign currency translation 703 (328 ) Ending balance $ 5,231 $ 7,249 The following table presents the Company's 2016 Restructuring Initiative liability for the year ended December 31, 2016 : 2016 Beginning balance $ — Restructuring charges 3,506 Reserve release — Cash paid (4 ) Other 166 Impact of foreign currency translation (6 ) Ending balance $ 3,662 The following table presents the Company's Acquisition Integration Restructuring Initiative liability for the year ended December 31, 2016 : 2016 Beginning balance $ — Restructuring charges 2,614 Cash paid (850 ) Ending balance $ 1,764 The following table presents the Company's total restructuring liability for the years ended December 31, 2016 and 2015 : 2016 2015 Beginning balance $ 7,249 $ — Restructuring charges 8,302 9,038 Reserve release (816 ) (28 ) Cash paid (4,775 ) (1,433 ) Impact of foreign currency translation 697 (328 ) Ending balance $ 10,657 $ 7,249

Segment Information

Segment Information	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Segment Information	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 in deciding how to allocate resources and assess performance. The Company’s chief operating decision maker is its Chief Executive Officer. The operating segments are aggregated into the three reportable segments described below. The Company’s chief operating decision maker evaluates the operating results of the Company’s operating and reportable segments based upon revenues and adjusted pre-tax income before NCI which adjusts income before income taxes to exclude certain items as noted below. The Fleet Solutions segment 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. The Travel and Corporate Solutions segment 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. The Health and Employee Benefit Solutions segment provides healthcare payment products and SaaS consumer directed platforms, as well as payroll related benefits to customers. No one customer accounted for more than 10 percent of the total consolidated revenue at December 31, 2016 . During the third quarter of 2016, management further refined its segment reporting, reclassifying certain revenues and expenses previously reported in our Health and Employee Benefit Solutions segment to its Fleet Solutions segment. The prior year amounts have been revised to reflect these adjustments, which were not deemed to be material to prior interim or annual periods, either individually or in the aggregate. 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 for the years ended December 31, 2016 , 2015 and 2014 : 2016 2015 2014 Fleet Solutions $ 3,053 $ 1,704 $ 1,853 Travel and Corporate Solutions 498 348 96 Health and Employee Benefit Solutions 13,581 5,116 4,717 Total interest income $ 17,132 $ 7,168 $ 6,666 The segment information has also been updated for the years ended December 31, 2015 and 2014 to disaggregate revenue into payment processing, account servicing, finance fee and other revenue in order to provide additional information regarding the Company’s significant revenue streams and to conform to the current year presentation. There was no change to total revenue or other financial information in any of the periods presented as a result of this updated presentation. The accounting policies of the reportable segments are generally the same as those described in the summary of significant accounting policies. Assets are not allocated to the segments for internal reporting purposes. The following tables present the Company’s reportable segment results on an adjusted pre-tax net income before NCI basis for the years ended December 31, 2016 , 2015 and 2014 : 2016 2015 2014 Fleet Solutions Payment processing revenue $ 297,900 $ 305,855 $ 357,050 Account servicing revenue 127,106 100,850 81,217 Finance fee revenue 124,725 83,554 75,703 Other revenue 92,330 57,419 54,373 Total Fleet Solutions revenue $ 642,061 $ 547,678 $ 568,343 Total Fleet Solutions operating interest expense $ 3,476 $ 1,869 $ 2,910 Total Fleet Solutions depreciation and amortization $ 100,860 $ 54,453 $ 54,789 Total Fleet Solutions adjusted pre-tax income before NCI $ 175,162 $ 199,319 $ 206,367 2016 2015 2014 Travel and Corporate Solutions Payment processing revenue $ 175,762 $ 151,311 $ 141,368 Account servicing revenue 1,247 1,930 1,647 Finance fee revenue 643 326 438 Other revenue 37,595 41,852 39,513 Total Travel and Corporate Solutions revenue $ 215,247 $ 195,419 $ 182,966 Total Travel and Corporate Solutions operating interest expense $ 2,969 $ 1,218 $ 410 Total Travel and Corporate Solutions depreciation and amortization $ 6,187 $ 2,999 $ 1,911 Total Travel and Corporate Solutions adjusted pre-tax income before NCI $ 103,167 $ 73,510 $ 87,664 2016 2015 2014 Health and Employee Benefit Solutions Payment processing revenue $ 46,957 $ 38,703 $ 21,569 Account servicing revenue 82,660 53,912 32,645 Finance fee revenue 13,572 5,113 4,742 Other revenue 17,963 13,812 7,383 Total Health and Employee Benefit Solutions revenue $ 161,152 $ 111,540 $ 66,339 Total Health and Employee Benefit Solutions operating interest expense $ 5,941 $ 2,541 $ 3,117 Total Health and Employee Benefit Solutions depreciation and amortization $ 34,604 $ 25,625 $ 13,680 Total Health and Employee Benefit Solutions adjusted pre-tax income before NCI $ 19,762 $ 28,576 $ 11,307 The following table reconciles income before income taxes to adjusted pre-tax income before NCI: Year ended December 31, 2016 2015 2014 Income before income taxes $ 87,101 $ 184,908 $ 301,639 Unrealized (gains) losses on derivative instruments (7,901 ) 35,962 (48,327 ) Net foreign currency remeasurement loss 7,665 5,689 13,438 Acquisition and divestiture related items 148,753 50,714 20,826 Stock-based compensation 19,742 12,420 13,790 Restructuring and other costs 13,995 9,010 — Vendor settlement 15,500 — — Debt restructuring and debt issuance cost amortization 12,673 3,097 2,641 Non-cash adjustments related to tax receivable agreement 563 (2,145 ) 1,331 Regulatory reserve — 1,750 — Adjusted pre-tax income before NCI $ 298,091 $ 301,405 $ 305,338 The Company’s chief operating decision maker evaluates the operating results of the Company’s operating and reportable segments based upon revenues and adjusted pre-tax income before NCI which adjusts income before income taxes to exclude acquisition and divestiture related items, debt restructuring costs, stock-based compensation, restructuring and other costs, a vendor settlement, unrealized gains and losses on derivatives, net foreign currency remeasurement gains and losses, non-cash adjustments related to tax receivable agreement and reserves for regulatory penalties. Beginning in the third quarter of 2016, adjusted pre-tax income before NCI further excluded debt issuance cost amortization. For comparative purposes, adjusted pre-tax income before NCI attributable to shareholders for the prior periods has been adjusted to reflect the exclusion of these items and differs from the figure previously reported due to this adjustment. Although adjusted pre-tax income before NCI is not calculated in accordance with GAAP, this non-GAAP measure is integral to the Company's reporting and planning processes and the chief operating decision maker of the Company uses it to allocate resources. The Company considers this measure integral because it excludes specified items that the Company's management excludes in evaluating the Company's performance. Specifically, in addition to evaluating the Company's performance on a GAAP basis, management evaluates the Company's performance on a basis that excludes the above items because: • Exclusion of the non-cash, mark-to-market adjustments on derivative instruments, including fuel price related derivatives and interest rate swap agreements, helps management identify and assess trends in the Company's underlying business that might otherwise be obscured due to quarterly non-cash earnings fluctuations associated with these derivative contracts. The non-cash, mark-to-market adjustments on derivative instruments are difficult to forecast accurately, making comparisons across historical and future quarters difficult to evaluate. • Net foreign currency gains and losses primarily result from the remeasurement to functional currency of cash, receivable and payable balances, certain intercompany notes denominated in foreign currencies and any gain or loss on foreign currency hedges relating to these items. The exclusion of these items helps management compare changes in operating results between periods that might otherwise be obscured due to currency fluctuations. • The Company considers certain acquisition-related costs, including certain financing costs, ticking fees, investment banking fees, warranty and indemnity insurance, certain integration related expenses and amortization of acquired intangibles, as well as gains and losses from divestitures to be unpredictable, dependent on factors that may be outside of our control and unrelated to the continuing operations of the acquired or divested business or the Company. In addition, the size and complexity of an acquisition, which often drives the magnitude of acquisition-related costs, may not be indicative of such future costs. The Company believes that excluding acquisition-related costs and gains or losses of divestitures facilitates the comparison of our financial results to the Company's historical operating results and to other companies in our industry. In prior periods, the Company has adjusted for goodwill impairments and acquisition related asset impairments. No goodwill or acquisition related impairments were identified during the years ended December 31, 2016, 2015 and 2014. • Stock-based compensation is different from other forms of compensation, as it is a non-cash expense. For example, a cash salary generally has a fixed and unvarying cash cost. In contrast, the expense associated with an equity-based award is generally unrelated to the amount of cash ultimately received by the employee, and the cost to the Company is based on a stock-based compensation valuation methodology and underlying assumptions that may vary over time. • Restructuring costs are related to employee termination benefits from certain identified initiatives to further streamline the business, improve the Company's efficiency, create synergies, and to globalize the Company's operations, all with an objective to improve scale and increase profitability going forward. We exclude these items when evaluating our continuing business performance as such items are not consistently occurring and do not reflect expected future operating expense, nor provide insight into the fundamentals of current or past operations of our business. • Vendor settlement represents a payment in exchange for the release of potential claims related to insourcing certain technology, and does not reflect recurring costs that would be relevant to the continuing operations of the Company. The Company believes that excluding this nonrecurring expense facilitates the comparison of our financial results to the Company's historical operating results and to other companies in our industry. • Debt issuance cost amortization is a non-cash item. Additionally, both these and the costs associated with debt restructuring are unrelated to the continuing operations of the Company. Because these types of costs are dependent upon the financing method which can vary widely company to company, we believe that excluding these costs helps to facilitate comparison to historical results as well as to other companies within our industry. • The non-cash adjustments related to tax receivable agreement have no significant impact on the ongoing operations of the business. • Regulatory reserves reflect charges related to the impact of a regulatory action which resulted in WEX paying a penalty. We have excluded this item when evaluating our continuing business performance as it is not consistently recurring and does not reflect an expected future operating expense, nor provide insight into the fundamentals of the current or past operations of our business. For the same reasons, WEX believes that adjusted pre-tax income before NCI may also be useful to investors as one means of evaluating the Company's performance. However, because adjusted pre-tax income before NCI is a non-GAAP measure, it should not be considered as a substitute for, or superior to, net income, operating income or cash flows from operating activities as determined in accordance with GAAP. In addition, pre-tax income before NCI as used by WEX may not be comparable to similarly titled measures employed by other companies. Geographic Data Revenue by principal geographic area, based on the country in which the sale originated, was as follows: Year ended December 31, 2016 2015 2014 Revenues: United States $ 839,917 $ 691,088 $ 708,827 Australia 53,068 50,387 57,897 Other international 125,475 113,162 50,923 Total revenues $ 1,018,460 $ 854,637 $ 817,647 No single country, other than the United States and Australia, made up more than 5 percent of total revenues for any of the years presented. Net property, equipment and capitalized software are subject to geographic risks because they are generally difficult to move and relatively illiquid. Net property, equipment and capitalized software by principal geographic area was as follows: Year ended December 31, 2016 2015 2014 Property, equipment and capitalized software, net: United States $ 146,165 $ 79,265 $ 72,334 Australia 5,493 5,445 6,280 Other international 15,620 53,875 26,982 Total property, equipment and capitalized software, net $ 167,278 $ 138,585 $ 105,596

Supplementary Regulatory Capita

Supplementary Regulatory Capital Disclosure	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Supplementary Regulatory Capital Disclosure	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 possible additional 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 and December 31, 2015 , 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 as of December 31, 2016 and 2015 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 2016 Total Capital to risk-weighted assets $ 228,402 12.59 % $ 145,182 8.00 % $ 181,477 10.00 % Tier 1 Capital to average assets 214,847 11.10 % 77,413 4.00 % 96,767 5.00 % Common equity to risk-weighted assets 214,847 11.84 % 81,665 4.50 % 117,961 6.50 % Tier 1 Capital to risk-weighted assets $ 214,847 11.84 % $ 108,887 6.00 % $ 145,183 8.00 % 2015 Total Capital to risk-weighted assets $ 202,294 15.50 % $ 104,437 8.00 % $ 130,547 10.00 % Tier 1 Capital to average assets 193,337 11.23 % 68,865 4.00 % 86,082 5.00 % Common equity to risk-weighted assets 193,337 14.81 % 58,746 4.50 % 84,855 6.50 % Tier 1 Capital to risk-weighted assets $ 193,337 14.81 % $ 78,328 6.00 % $ 104,437 8.00 %

Quarterly Financial Results (Un

Quarterly Financial Results (Unaudited)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Results (Unaudited)	Quarterly Financial Results (Unaudited) Summarized quarterly results for the years ended December 31, 2016 and 2015 , are as follows: Three months ended March 31 June 30 September 30 December 31 2016 Total revenues (a) $ 205,928 $ 233,936 $ 287,756 $ 290,840 Operating income (a) $ 41,127 $ 51,635 $ 54,568 $ 47,798 Net earnings attributable to shareholders (a) $ 23,086 $ 12,567 $ 19,696 $ 5,288 Earnings per share: (a) Basic $ 0.60 $ 0.32 $ 0.46 $ 0.12 Diluted $ 0.59 $ 0.32 $ 0.46 $ 0.12 2015 Total revenues $ 202,285 $ 213,653 $ 226,057 $ 212,642 Operating income $ 48,240 $ 62,918 $ 67,745 $ 49,890 Net earnings attributable to shareholders $ 22,345 $ 26,492 $ 32,166 $ 20,901 Earnings per share: Basic $ 0.58 $ 0.68 $ 0.83 $ 0.54 Diluted $ 0.57 $ 0.68 $ 0.83 $ 0.54 (a) Results for three months ended September 30, 2016 and December 31, 2016 include the operations of EFS and the issuance of approximately 4,000 shares of common stock for the acquisition of EFS on July 1, 2016. Basic and diluted net income per share are computed independently for each quarter presented. Therefore, the sum of quarterly basic and diluted net income per share information may not equal annual basic and diluted net income per share.

Summary of Significant Accoun35

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Business Description	Business Description WEX Inc. (“Company”, "we" or "our") is a provider of corporate card payment solutions. The Company provides products and services that meet the needs of businesses in various geographic regions including North and South America, Asia Pacific and Europe. The Company’s Fleet Solutions, Travel and Corporate Solutions, and Health and Employee Benefit Solutions segments provide its customers with security and control for complex payments across a wide spectrum of business sectors. The Company markets its products and services directly, as well as through strategic relationships which include major oil companies, fuel retailers, vehicle maintenance providers, online travel agencies and health partners.
Basis of Presentation	Basis of Presentation The accompanying consolidated financial statements of WEX Inc. for the years ended December 31, 2016 , 2015 and 2014 , include the accounts of WEX Inc. and its material subsidiaries. All intercompany accounts and transactions have been eliminated in consolidation. The presentation of the accompanying consolidated statements of income has been updated for the years ended December 31, 2015 and 2014 to disaggregate revenue into payment processing, account servicing, finance fee and other revenue in order to provide additional information regarding the Company’s significant revenue streams and to conform to the current year presentation. There was no change to total revenue, income from operations, net income or net income per share in any of the periods presented as a result of this updated presentation. The Company rounds amounts in the consolidated financial statements to thousands and calculates all percentages and per-share data from underlying whole-dollar amounts. Thus, certain amounts may not foot, crossfoot, or recalculate based on reported numbers due to rounding.
Recent Accounting Pronouncements	In September 2015, the FASB issued ASU 2015-16 related to simplifying the accounting for measurement period adjustments. This standard replaces the requirement that an acquirer in a business combination account for measurement period adjustments retrospectively. Under the amendments, an acquirer must recognize adjustments to the provisional amounts that are identified during the measurement period in the reporting period in which the adjustment amounts are determined, including the effect on earnings of changes in depreciation, amortization, or other income effects as if the accounting had been completed at the acquisition date. The guidance is to be applied prospectively to adjustments to provisional amounts that occur after the effective date of the guidance. The Company adopted this standard on January 1, 2016. In April 2015, the FASB issued ASU 2015-03 related to the simplification of the presentation of debt issuance costs. The standard requires entities to present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs is reported as interest expense. The ASU provides that debt issuance costs are analogous to debt discounts and reduce the proceeds of borrowing which increases the effective interest rate. Prior to the amendment, debt issuance costs were reported in the balance sheet as an asset. The amended guidance was effective for financial statements issued for fiscal years beginning after December 15, 2015, required retrospective adoption, and represented a change in accounting principle. In January 2017, the FASB issued ASU 2017-04, which simplifies how an entity is required to test goodwill for impairment by eliminating Step 2, the comparison of the implied fair value of goodwill to the respective carrying amount of each reporting unit. Under the amendments, an entity will perform a one-step quantitative test and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. The standard is effective for annual or interim goodwill impairment tests in fiscal years beginning after December 15, 2019. Early adoption is permitted for testing dates after January 1, 2017. The Company does not believe this standard will have a material impact on the consolidated financial statements and related disclosures. In November 2016, the FASB issued ASU 2016-18 which provides clarification on the classification and presentation of restricted cash in the statement of cash flows, thereby reducing diversity in practice. The statement of cash flows must explain the change during the period in the total of cash and cash equivalents and amounts described as restricted cash or cash equivalents. The standard is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those fiscal years, and requires retrospective application to all periods presented. Early adoption is permitted. The Company does not believe this standard will have a material impact on our consolidated statement of cash flows. In August 2016, the FASB issued ASU 2016-15 which provides clarification on the classification of eight specific cash flow presentation issues that have developed out of diversity in practice. The issues include, but are not limited to, debt prepayment or extinguishment costs, cash receipts from payments on beneficial interests in securitization transactions, and proceeds from the settlement of insurance claims. The standard is effective for annual reporting periods beginning after December 15, 2017, including interim periods within those fiscal years. The Company is currently evaluating the impact the standard will have on the consolidated financial statements and related disclosures. In June 2016, the FASB issued ASU 2016-13 which requires financial assets measured at amortized cost basis to be presented at the net amount expected to be collected. The measurement of expected credit losses will be based on historical experience, current conditions, and reasonable and supportable forecasts that impact the collectability of the reported amount. The standard is effective for annual reporting periods beginning after December 15, 2019, including interim periods within those fiscal years. The Company is currently evaluating the impact the standard will have on the consolidated financial statements and related disclosures. In March 2016, the FASB issued ASU 2016-09 to simplify 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. The standard is effective for annual reporting periods beginning after December 15, 2016, including interim periods within that reporting period. Adopting this standard will result in increased income tax expense volatility, the nature of which will be dependent on the magnitude of our common stock price fluctuations. The other aspects of this standard are not expected to have a material impact on the consolidated financial statements and related disclosures. In February 2016, the FASB issued ASU 2016-02 to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. When transitioning, the standard requires leases to be recognized and measured at the beginning of the earliest period presented using a modified retrospective approach. Certain qualitative and quantitative disclosures are required. The standard is effective for annual reporting periods beginning after December 15, 2018, including interim periods within that reporting period. The Company is currently evaluating the impact the standard will have on the consolidated financial statements and related disclosures. In January 2016, the FASB issued ASU 2016-01 related to accounting for equity investments. The pronouncement requires equity investments, except those accounted for under the equity method of accounting, or those that result in consolidation of the investee, to be measured at fair value with changes in fair value recognized in net income. The standard is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. The Company is currently evaluating the impact the pronouncement will have on the consolidated financial statements and related disclosures. In May 2014, the FASB issued ASU 2014-09, which will supersede most existing revenue recognition guidance under U.S. GAAP ("Topic 606"). 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. 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. As such, approximately 14% of consolidated revenues for the year ended December 31, 2016 will not be impacted by 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, or approximately 48% of consolidated revenues for the year ended December 31, 2016, will remain substantially unchanged under the new standard. The Company is in the process of assessing the remaining revenue streams that fall within the scope of this new standard. Included in this assessment is confirming principle vs. agent determinations, reviewing commission structure and applying the series guidance to the Company's revenue streams. 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 were approximately $20,000 for the year ended December 31, 2016. On July 9, 2015, the FASB voted to defer the effective date by one year to interim and annual reporting periods beginning after December 15, 2017, and permitted early adoption of the standard, but not for periods beginning on or before the original effective date of January 1, 2017. The Company is not electing early adoption and as a result the standard will become effective 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 currently anticipates adopting the standard using the modified retrospective method.
Use of Estimates and Assumptions	Use of Estimates and Assumptions The Company prepares its consolidated financial statements in conformity with GAAP and with the Rules and Regulations of the SEC, specifically Regulation S-X and the instructions to Form 10-K. These principles require management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the disclosures of contingent assets and liabilities as of the date of the financial statements and the reported amounts of revenue and expenses during the period. Actual results could differ from those estimates and those differences may be material.
Cash and Cash Equivalents	Cash and Cash Equivalents Highly liquid investments with remaining maturities at the time of purchase of three months or less (that are readily convertible to cash) are considered to be cash equivalents and are stated at cost, which approximates fair value. Cash equivalents include federal funds sold, which are unsecured short-term investments entered into with financial institutions.
Restricted Cash	Restricted Cash Restricted cash represents funds collected from individuals or employers on behalf of our customers that are to be remitted to third parties or funds required to be maintained on hand under certain vendor agreements. This restricted cash, which totaled $22,412 and $17,783 as of December 31, 2016 and 2015, respectively, is classified in Other Assets on the Company’s consolidated balance sheets. We maintain an offsetting liability against restricted cash collected and remitted on behalf of our customers. Restricted cash is not available to fund the Company’s operations.
Accounts Receivable and Reserve for Credit Losses	Accounts Receivable and Reserve for Credit Losses Accounts receivable balances are stated at net realizable value. The balance includes a reserve for credit losses which reflects management’s estimate of uncollectable balances resulting from credit and fraud losses. Management has consistently considered its portfolio of charge card receivables as a large group of smaller balance accounts that it has collectively evaluated for impairment. The reserve for credit losses is established based on the determination of the amount of expected credit losses inherent in the accounts receivable as of the reporting date. Management reviews delinquency reports, historical collection rates, changes in customer payment patterns, economic trends, geography and other information in order to make judgments as to probable credit losses. Management also uses historical charge off experience to determine the amount of losses inherent in accounts receivable at the reporting date. Assumptions regarding probable credit losses are reviewed periodically and may be impacted by actual performance of accounts receivable and changes in any of the factors discussed above.
Available-for-sale Securities	Available-for-sale Securities The Company records certain investments as available-for-sale securities. Available-for-sale securities are carried at fair value, with unrealized gains and losses, net of tax, reported on the consolidated balance sheets in accumulated other comprehensive loss. Realized gains and losses and declines in fair value determined to be other-than-temporary are included in non-operating expenses. The cost basis of securities is based on the specific identification method. Interest and dividends earned on securities classified as available-for-sale are included in other revenues. Available-for-sale securities held by the Company were purchased and are held by WEX Bank in order to meet the requirements of the Community Reinvestment Act.
Derivatives	Derivatives The Company has used derivative instruments as part of its overall strategy to manage its exposure to fluctuations in fuel prices and to reduce the impact of interest rate volatility. All derivatives are recorded at fair value on the consolidated balance sheets . 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. The interest rate swaps do not qualify for hedge accounting treatment; therefore, gains or losses related to the interest rate swaps, both realized and unrealized, are recognized in earnings. For the purposes of cash flow presentation, realized and unrealized gains or losses related to the interest rate swaps are included in operating cash flows, which is consistent with the cash flow treatment of the underlying interest expense on our outstanding borrowings. The Company’s fuel price derivative instruments did not qualify for hedge accounting treatment; therefore, gains or losses related to fuel price derivative instruments, both realized and unrealized, were recognized in earnings. These instruments are presented on the consolidated balance sheet as fuel price derivatives, at fair value. For the purposes of cash flow presentation, realized and unrealized gains or losses related to fuel price derivative instruments are included in operating cash flows, as they were intended to hedge operating cash flows. After the first quarter of 2016, the Company was no longer partially hedged for changes in fuel prices. In April 2014, the Company initiated a partial foreign currency exchange hedging program and managed foreign currency exchange exposure on an intra-quarter basis. The majority of the hedges were intended to renew on a monthly basis. Because this was a partial foreign currency exchange hedging program, the Company had additional foreign currency exchange exposure which was not hedged. During the third quarter of 2015, the Company decided to suspend the foreign currency exchange hedging program for all but a few short-term intercompany transactions.
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.
Property and Equipment	Property and Equipment Property and equipment are stated at cost less accumulated depreciation. Replacements, renewals and improvements are capitalized and costs for repair and maintenance are expensed as incurred. Depreciation is primarily computed using the straight-line method over the estimated useful lives shown below. Leasehold improvements are primarily depreciated using the straight-line method over the lesser of the useful life of the asset or over the remaining lease term. Below are the estimated useful lives for assets placed in service during 2016 and beyond: Estimated Useful Lives Furniture, fixtures and equipment 3 to 5 years Internal-use computer software 3 years Computer software 18 months to 7 years Leasehold improvements up to 5 years
Capitalized Software	Capitalized Software The Company develops software that is used to provide processing and information management services to customers. A significant portion of the Company’s capital expenditures is devoted to the development of such internal-use computer software. Software development costs are capitalized during the application development stage. Costs incurred during the preliminary project stage are expensed as incurred. Capitalization begins when the preliminary project stage is complete, as well as when management authorizes and commits to the funding of the project. Capitalization of costs ceases when the software is ready for its intended use. Software development costs are amortized using the straight-line method over the estimated useful life of the software.
Goodwill and Other Intangible Assets	Goodwill and Other Intangible Assets The Company classifies intangible assets in the following three categories: (1) intangible assets with definite lives subject to amortization, (2) intangible assets with indefinite lives not subject to amortization and (3) goodwill. The Company tests intangible assets with definite lives for impairment if conditions exist that indicate the carrying value may not be recoverable. Such conditions may include a reduction in operating cash flow or a dramatic change in the manner in which the asset is intended to be used. The Company would record an impairment charge when the carrying value of the definite-lived intangible asset is not recoverable from the undiscounted cash flows generated from the use of the asset. Intangible assets with indefinite lives and goodwill are not amortized. The Company tests these intangible assets and goodwill for impairment at least annually or more frequently if facts or circumstances indicate that such intangible assets or goodwill might be impaired. All goodwill and intangible assets are assigned to reporting units, which are one level below the Company’s operating segments. The Company performs impairment tests at the reporting unit level. Such impairment tests include comparing the fair value of the respective reporting unit with its carrying value, including goodwill. The Company uses both discounted cash flow analyses and comparable company pricing multiples to determine the fair value of our reporting units. Such analyses are corroborated using market analytics. Certain assumptions are used in determining the fair value, including assumptions about future cash flows and terminal values. When appropriate, the Company considers the assumptions that it believes hypothetical marketplace participants would use in estimating future cash flows. In addition, an appropriate discount rate is used, based on the Company’s cost of capital or reporting unit-specific economic factors. When the fair value is less than the carrying value of the intangible assets or the reporting unit, the Company records an impairment charge to reduce the carrying value of the assets to the reporting unit's implied fair value. The Company's annual goodwill and intangible asset impairment tests performed as of October 1, 2016 , 2015 and 2014 did not identify any impairment. Intangible assets that are deemed to have definite lives are amortized over their useful lives, which is the period of time that the asset is expected to contribute directly or indirectly to future cash flows. The Company determines the useful lives of its identifiable intangible assets after considering the specific facts and circumstances related to each intangible asset. The factors that management considers when determining useful lives include the contractual term of agreements, the history of the asset, the Company’s long-term strategy for the use of the asset, any laws or other local regulations which could impact the useful life of the asset and other economic factors, including competition and specific market conditions. An evaluation of the remaining useful lives of the definite-lived intangible assets is performed periodically to determine if any change is warranted.
Impairment and Disposals of Long-lived Assets	Impairment and Disposals of Long-lived Assets Long-lived assets are tested for impairment whenever facts or circumstances, such as a reduction in operating cash flow or a dramatic change in the manner the asset is intended to be used, indicate the carrying amount of the asset may not be recoverable. If indicators exist, the Company compares the estimated undiscounted future cash flows associated with these assets or operations to their carrying value to determine if a write-down to fair value is required. The Company did not recognize any significant impairment expense on the Company’s long-lived assets during the years ended December 31, 2016 , 2015 and 2014 . Disposals in the ordinary course of business are recorded in occupancy and equipment in the consolidated statements of income.
Fair Value of Financial Instruments	Fair Value of Financial Instruments The carrying values of cash and cash equivalents, accounts receivable, accounts payable, accrued expenses, and other liabilities approximate their respective fair values due to the short-term nature of such instruments. The carrying values of certificates of deposit, interest-bearing money market deposits and borrowed federal funds approximate their respective fair values as the interest rates on these financial instruments are variable market-based rates. All other financial instruments are reflected at fair value on the consolidated balance sheets. Foreign Currency Contracts Derivatives include foreign currency forward and swap contracts. Our foreign currency forward and swap contracts are valued using an income approach (Level 2) based on the spot rate less the contract rate multiplied by the notional amount. We consider counterparty credit risk in the valuation of the Company's derivatives. This credit risk did not have a material impact on the valuation of the Company's derivatives during 2016 and 2015 . Fuel Price Derivatives The majority of derivatives entered into by the Company were executed over-the-counter and were valued using internal valuation techniques as no quoted market prices exist for such instruments. The valuation technique and inputs depended on the type of derivative and the nature of the underlying instrument. The principal technique used to value these instruments was a comparison of the spot price of the underlying instrument to its related futures curve adjusted for the Company’s assumptions of volatility and present value, where appropriate. The fair values of derivative contracts reflected the expected cash the Company would pay or receive upon settlement of the respective contracts. After the first quarter of 2016, the Company no longer holds any fuel price derivatives. The key inputs depended upon the type of derivative and the nature of the underlying instrument and include interest rate yield curves, the spot price of the underlying instrument, volatility, and correlation. The item was placed in either Level 2 or Level 3 depending on the observability of the significant inputs to the model. Correlation and items with longer tenures were generally less observable. Interest Rate Swap Arrangements We determine the fair value of our interest rate swaps based on the discounted cash flows of the difference between the projected fixed payments on the swap and the implied floating payments using the current LIBOR curve, which are Level 2 inputs in the fair value hierarchy. Debt We determine the fair value of the amount outstanding under our 2016 Credit Facility 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 11, Derivative Instruments) and certain other financial instruments which are carried at fair value. The Company determines fair value based upon quoted prices when available or through the use of alternative approaches, such as model pricing, when market quotes are not readily accessible or available. In determining the fair value of the Company’s obligations, various factors are considered including: closing exchange or over-the-counter market price quotations; time value and volatility factors underlying options and derivatives; price activity for equivalent instruments; and the Company’s own-credit standing. These valuation techniques may be based upon observable and unobservable inputs. Observable inputs reflect market data obtained from independent sources, while unobservable inputs reflect the Company’s market assumptions. These two types of inputs create the following fair value hierarchy: • Level 1 – Quoted prices for identical instruments in active markets. • Level 2 – Quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-derived valuations whose inputs are observable or whose significant value drivers are observable. • Level 3 – Instruments whose significant value drivers are unobservable. 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. Available-for-sale Securities and Executive Deferred Compensation Plan Trust When available, the Company uses quoted market prices to determine the fair value of available-for-sale securities; such items are classified in Level 1 of the fair-value hierarchy. These securities primarily consist of 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 bonds, the Company generally uses quoted prices for recent trading activity of assets with similar characteristics to the debt security or bond being valued. The securities and bonds priced using such methods are generally classified as Level 2. The obligations related to the deferred compensation plan trust are classified as Level 1 in the fair value hierarchy because the fair value is determined using quoted prices for identical instruments in active markets.
Revenue Recognition	Revenue Recognition The majority of the Company’s revenues are comprised of transaction-based fees, which are generally calculated based on measures such as (i) percentage of dollar value of volume processed; (ii) number of transactions processed; or (iii) some combination thereof. The Company has entered into agreements with major oil companies, fuel retailers and vehicle maintenance providers which provide products and/or services to the Company’s customers. These agreements specify that a transaction is deemed to be captured when the Company has validated that the transaction has no errors and has accepted and posted the data to the Company’s records. The Company recognizes revenues when persuasive evidence of an arrangement exists, the products and services have been provided to the client, the sales price is fixed or determinable and collectability is reasonably assured. The Company generally records revenue net of costs based on the following criteria: (i) the Company is not the primary obligor in the arrangement; (ii) the Company has no inventory risk; (iii) the Company does not have reasonable latitude with respect to establishing the price for the product; (iv) the Company does not make any changes to the product or have any involvement in the product specifications and (v) the amount the Company earns for its services is fixed, within a limited range. The Company enters into contracts with certain large customers or strategic relationships that provide for fee rebates tied to performance milestones. Rebates are recorded as a reduction in revenue in the same period that revenue is earned or performance occurs. Rebates and incentives are calculated based on estimated performance and the terms of the related business agreements. A description of the major components of revenue are as follows: Payment Processing Revenue . Revenue consists of transaction fees as well as interchange income; • Fleet transaction fees are assessed to major oil companies, fuel retailers and vehicle maintenance providers. We extend short-term credit to the fleet customer and pay the purchase price for the fleet customer’s transaction, less the payment processing fees we retain, to the merchant. We collect the total purchase price from the fleet customer. The fee charged is generally based upon a percentage of the total transaction amount; however, it may also be based on a fixed amount charged per transaction or on a combination of both measures. The Company records revenue at the time the transaction is captured. • In Europe, our payment processing revenue is specifically derived from the difference between the negotiated price of the fuel from the supplier and the agreed upon price paid by the fleets. • Interchange income is earned from the Company’s suite of card products in the Fleet Solutions and Health and Employee Benefit Solutions segments, as well as on our virtual card technology. Interchange income is a fee paid by a merchant bank to the card-issuing bank through the interchange network. Interchange fees are set by the credit card providers. The Company recognizes interchange income as earned. With regard to fleet and travel payment processing revenue, the Company is generally responsible for the collection of the total transaction amount from the customer and the payment to the merchant of their sales amount, net of the payment processing revenue earned by the Company, and as such, recognizes revenue net of the cost of the underlying products and services. As a consequence, the Company’s accounts receivable and accounts payable related to its payment processing revenues are reflective of the total transaction amount processed by the Company, not the Company’s revenue. Account Servicing Revenue . In our Fleet Solutions segment, account servicing revenue is primarily comprised of monthly fees based on vehicles serviced. These fees are primarily in return for providing monthly vehicle data reports. In our Health and Employee Benefit Solutions segment, we also recognize account servicing fees for the per-participant per-month fee charged per consumer on our healthcare financial technology platform. Account servicing revenue is recognized monthly, as the Company fulfills its contractual service obligations. Finance Fees . The Company earns revenue by assessing monthly finance fees on accounts with overdue balances. These fees are recognized as revenue at the time the fees are assessed. The finance fee is calculated using a stated late fee rate based on the entire balance outstanding from the customer. On occasion, these fees are waived to maintain customer goodwill. The Company’s established reserve for such waived amounts is estimated and offset against the late fee revenue recognized. These waived fees amounted to $10,922 , $6,013 and $6,002 in 2016 , 2015 and 2014 , respectively. The Company engages in factoring, the purchase of accounts receivable from a third party at a discount. Revenue earned in this transaction is recorded in finance fees. We also recognize fees for interest associated with the Company’s fuel desk product and interest earned on the Company’s foreign paycard product. Other . The Company earns transaction fees, which are principally based on the number of transactions processed; however, the fees may be a percentage of the total transaction amount. These fees are recognized at the time the transaction is captured. The Company assesses fees for providing ancillary services, such as information products and services, professional services and marketing services. Other revenues also include cross-border fees, fees for overnight shipping, certain customized electronic reporting and customer contact services provided on behalf of certain of the Company’s customers. Service related revenues are recognized in the period that the work is performed. Interest and dividends earned on investments in available-for-sale securities are included in other revenues. Such income is recognized in the period that it is earned. The Company sells telematics devices as part of its WEX Telematics program. In addition, prior to the divestiture of Pacific Pride, the Company sold assorted equipment to its Pacific Pride franchisees. The Company recognizes revenue from these sales when the customer has accepted delivery of the product and collectability of the sales amount is reasonably assured. From time to time the Company enters into agreements with suppliers, partners and customers and offers incentives to establish access to new channels, enter new market segments and expand the use and acceptance of WEX products and services. As part of these agreements the Company may agree to pay an up-front bonus or fee. The company capitalizes these payments within other assets in the consolidated balance sheets and amortizes each monthly, generally on a straight-line basis against the related revenue earned throughout the life of the agreement.
Stock-Based Compensation	Stock-Based Compensation The Company recognizes the fair value of all stock-based payments to employees in its financial statements. The Company estimates the fair value of stock option awards using a Black-Scholes-Merton valuation model. The fair value of Restricted Stock Units ("RSUs"), including Performance Based Restricted Stock Units ("PBRSUs"), is determined and fixed on the grant date based on the Company's stock price. The Company uses the straight-line methodology for recognizing the expense associated with stock options and RSU grants and a graded-vesting methodology for the expense recognition of PBRSUs. This recognized expense is net of estimated forfeitures and is recorded over each award's requisite service period. Stock-based compensation is recorded in salary and other personnel expense in the consolidated statements of income.
Advertising Costs	Advertising Costs Advertising and marketing costs are expensed in the period incurred.
Income Taxes	Income Taxes Income taxes are accounted for under the asset and liability method. Under this method, deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. The effect on deferred tax assets and liabilities of a change in tax rates is recognized in the period that includes the enactment date. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which the associated temporary differences became deductible. A valuation allowance is established for those jurisdictions in which deferred tax assets realization is deemed less than more likely than not. Deferred taxes are not provided for the undistributed earnings of the Company’s foreign subsidiaries that are considered to be indefinitely reinvested outside of the United States. Current accounting guidance prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. This accounting guidance also provides guidance on derecognition, classification, interest and penalties, accounting in the interim periods, disclosure, and transition. Penalties and interest related to uncertain tax positions are recognized as a component of income tax expense. To the extent penalties and interest are not assessed with respect to uncertain tax positions, amounts accrued are reduced and reflected as a reduction of the overall income tax provision.
Earnings per Common Share	Earnings per Common 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 ("DSUs) 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 and assumed issuance of unvested RSUs and DSUs and unvested PBRSUs 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, the total unrecognized compensation expense for unvested share-based compensation awards and the excess tax benefits resulting from share-based compensation tax deductions in excess of the related expense recognized for financial reporting purposes, would be used to purchase the Company's common stock at the average market price during the period.
Foreign Currency Movement	Foreign Currency Movement The financial statements of the Company’s foreign subsidiaries, where the local currency is the functional currency, are Realized and unrealized gains and losses on foreign currency transactions as well as the re-measurement of the Company's cash, receivable and payable balances that are denominated in foreign currencies, are recorded directly in the consolidated statements of income. However, gains or losses resulting from intercompany transactions where repayment is not anticipated for the foreseeable future are not recognized in the consolidated statements of income. In these situations, the gains or losses are deferred and included as a component of accumulated other comprehensive loss. In addition, gains and losses associated with the Company's foreign currency exchange derivatives are recorded in gains and losses on foreign currency in the consolidated statements of income.
Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Accumulated other comprehensive loss includes unrealized gains and losses on available-for-sale securities and foreign currency translation adjustments pertaining to the net investment in foreign operations. Amounts are recognized net of tax to the extent applicable. Realized gains or losses on securities transactions are classified as non-operating in the consolidated statements of income.
Investment, Policy	The Company reviews its investments to identify and evaluate indications of possible impairment. Factors considered in determining whether a loss is temporary include the length of time and extent to which the fair value has been less than the cost basis, the financial condition and near-term prospects of the investee, and the Company’s intent and ability to hold the investment for a period of time sufficient to allow for any anticipated recovery in market value. Substantially all of the Company’s fixed income securities are rated investment grade or better.
Derivatives Not Designated or Qualifying as Hedges	The Company’s fuel price, foreign currency, and interest rate swap derivative instruments do not qualify for hedge accounting treatment, and therefore, no such hedging designation has been made. For these derivative instruments, the gain or loss is recognized in the consolidated statements of income.

Summary of Significant Accoun36

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Schedule of Error Corrections and Prior Period Adjustments	As a result of the adoption, the December 31, 2015 consolidated balance sheet is restated as follows: Previously Reported Effect of Accounting Principle Adoption Adjusted Consolidated balance sheet Other assets $ 225,581 $ (10,037 ) $ 215,544 Total assets 3,857,946 (10,037 ) 3,847,909 Revolving line-of-credit facilities and term loan, net 669,755 (4,837 ) 664,918 Notes outstanding, net 400,000 (5,200 ) 394,800 Total liabilities 2,762,265 (10,037 ) 2,752,228 Total liabilities and stockholders’ equity $ 3,857,946 $ (10,037 ) $ 3,847,909
Schedule of Glossary of Terms in Document	The acronyms and abbreviations identified below are used in the accompanying consolidated financial statements and the notes thereto. The following is provided to aid the reader and provide a reference point when reviewing the consolidated financial statements: 2011 Credit Agreement Credit agreement entered into on May 23, 2011 among the Company, as borrower, WEX Card Holdings Australia Pty Ltd, a wholly-owned subsidiary of the Company, as specified designated borrower, Bank of America, N.A., as administrative agent and letter of credit issuer, and the other lenders party thereto 2013 Credit Agreement Amended and restated credit agreement entered into on January 18, 2013 by and among the Company and certain of our subsidiaries, as borrowers, and WEX Card Holdings Australia Pty Ltd, as specified designated borrower, with a lending syndicate 2014 Amendment Agreement Amendment and restatement agreement entered into on August 22, 2014, among the Company, the lenders party thereto, and Bank of America, N.A., as administrative agent 2014 Credit Agreement Second amended and restated credit agreement entered into on August 22, 2014, by and among the Company and certain of its subsidiaries, as borrowers, WEX Card Holding Australia Pty Ltd., as designated borrower, and Bank of America, N.A., as administrative agent on behalf of consenting lenders. 2016 Credit Agreement Credit agreement entered into on July 1, 2016 by and among the Company and certain of its subsidiaries, as borrowers, WEX Card Holding Australia Pty Ltd., as designated borrower, and Bank of America, N.A., as administrative agent on behalf of the lenders Adjusted Net Income or ANI A non-GAAP measure that adjusts net earnings attributable to shareholders to exclude acquisition and divestiture related items, debt restructuring and debt issuance cost amortization, stock-based compensation, restructuring and other costs, a vendor settlement, unrealized gains and losses on derivatives, net foreign currency remeasurement gains and losses, non-cash adjustments related to tax receivable agreement, reserves for regulatory penalties, similar adjustments attributed to our non-controlling interest and certain tax related items. ASU 2014-09 Accounting Standards Update No. 2014-09 Revenue from Contracts with Customers (Topic 606) ASU 2015-03 Accounting Standards Update No. 2015-03 Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs ASU 2015-16 Accounting Standards Update No. 2015-16 Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments ASU 2016-01 Accounting Standards Update No. 2016-01 Financial Instruments - Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ASU 2016-02 Accounting Standards Update No. 2016-02 Leases (Topic 842) ASU 2016-09 Accounting Standards Update No. 2016-09 Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting ASU 2016-13 Accounting Standards Update No. 2016-13 Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ASU 2016-15 Accounting Standards Update No. 2016-15 Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments Australian Securitization Subsidiary Southern Cross WEX 2015-1 Trust, a bankruptcy-remote subsidiary consolidated by the Company Average expenditure per payment processing transaction Average total dollars of spend in a funded fuel transaction Benaissance Benaissance, a leading provider of integrated SaaS technologies and services for healthcare premium billing, payment and workflow management, acquired by the Company on November 18, 2015. Company WEX Inc. and all entities included in the consolidated financial statements EFS Electronic Funds Source, LLC, a provider of customized corporate payment solutions for fleet and corporate customers with a focus on the large and mid-sized over-the-road fleets. On July 1, 2016, the Company acquired WP Mustang Topco LLC, the indirect parent of Electronic Funds Source, LLC and Warburg Pincus Private Equity XI (Lexington), LLC, an affiliated entity, from investment funds affiliated with Warburg Pincus LLC. Esso portfolio in Europe European commercial fleet card portfolio acquired from ExxonMobil European Securitization Subsidiary Gorham Trade Finance B.V., a bankruptcy-remote subsidiary consolidated by the Company Evolution1 EB Holdings Corp. and its subsidiaries which includes Evolution1, Inc., acquired by the Company on July 16, 2014 Evolution1 Plan Evolution1 401(k) Plan sponsored by Evolution1 Inc. FASB Financial Accounting Standards Board FDIC Federal Deposit Insurance Corporation FX Foreign exchange GAAP Generally Accepted Accounting Principles in the United States Higher One Higher One, Inc. a technology and payment services company focused on higher education Indenture The Notes were issued pursuant to an indenture dated as of January 30, 2013 among the Company, the guarantors listed therein, and The Bank of New York Mellon Trust Company, N.A., as trustee NCI Non-controlling interest NOL Net operating loss Notes $400 million notes with a 4.75% fixed rate, issued on January 30, 2013 NOW deposits Negotiable order of withdrawal deposits Over-the-road Typically heavy trucks traveling long distances Pacific Pride Pacific Pride Services, LLC, previously a wholly-owned subsidiary, sold on July 29, 2014 Payment solutions purchase volume Total amount paid by customers for transactions Payment processing transactions Funded payment transactions where the Company maintains the receivable for total purchase PPG Price per gallon of fuel rapid! PayCard rapid! PayCard, previously a line of business of the Company, sold on January 7, 2015 SaaS Software-as-a-service SEC Securities and Exchange Commission Ticking fees A fee incurred by a borrower to compensate the lender to delay a financing arrangement and hold a commitment of funds for the borrower for a period of time Total fleet transactions Total of transaction processing and payment processing transactions Transaction processing transactions Unfunded payment transactions where the Company is the processor and only has receivables for the processing fee UNIK UNIK S.A., the Company's Brazilian subsidiary, which has been subsequently branded WEX Brazil WEX WEX Inc. WEX Europe Services Consists primarily of our ESSO portfolio in Europe acquired by the Company from ExxonMobil on December 1, 2014 WEX Health Evolution1 and Benaissance, collectively
Estimated Useful Lives	Below are the estimated useful lives for assets placed in service during 2016 and beyond: Estimated Useful Lives Furniture, fixtures and equipment 3 to 5 years Internal-use computer software 3 years Computer software 18 months to 7 years Leasehold improvements up to 5 years
Schedule of Internal-Use Software	Below are the amounts of internal-use software capitalized and amortized: Year ended December 31, 2016 2015 2014 Amounts capitalized for internal-use computer software (including work-in-process) $ 55,379 $ 52,218 $ 34,053 Amounts expensed for amortization of internal-use computer software $ 27,581 $ 20,316 $ 18,661
Income Available for Common Stockholders Used to Calculate Earnings Per Share	Income available for common stockholders used to calculate earnings per share is as follows: Year ended December 31, 2016 2015 2014 Net earnings attributable and available for common stockholders –Basic and Diluted $ 60,637 $ 101,904 $ 202,211
Weighted Average Common Shares Outstanding Used to Calculate Earnings Per Share	Weighted average common shares outstanding used to calculate earnings per share are as follows: Year ended December 31, 2016 2015 2014 Weighted average common shares outstanding – Basic 40,809 38,771 38,890 Dilutive impact of share based compensation awards 105 72 110 Weighted average common shares outstanding – Diluted 40,914 38,843 39,000

Business Acquisitions and Oth37

Business Acquisitions and Other Intangible Assets Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2016
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following is a summary of the allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired) $ 379,458 Less: Accounts receivable 303,376 Other tangible assets and liabilities, net (8,497 ) Licensing agreements (a) 36,605 Customer relationships (b) 7,346 Recorded goodwill $ 40,628 (a) Weighted average life – 4.6 years . (b) Weighted average life – 7.2 years . The following is a summary of the final allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired) $ 80,677 Less: Accounts receivable 1,594 Other tangible assets and liabilities, net 314 Acquired software and developed technology (a) 10,300 Customer relationships(b) 27,700 Trade name(c) 1,500 Recorded goodwill $ 39,269 (a) Weighted average life – 5.0 years . (b) Weighted average life – 7.6 years . (c) Weighted average life – 8.1 years The following is a summary of the allocation of the purchase price to the assets and liabilities acquired: Consideration paid (net of cash acquired) $ 532,174 Less: Accounts receivable 8,418 Accounts payable (175 ) Deferred tax liabilities, net (68,768 ) Other tangible assets and liabilities, net (3,712 ) Acquired software and developed technology (a) 70,000 Customer relationships (b) 211,000 Trade name (c) 7,900 Trade name (d) 11,000 Recorded goodwill $ 296,511 (a) Weighted average life – 6.4 years . (b) Weighted average life – 9.7 years . (c) Weighted average life – 9.9 years . (d) Indefinite-lived The following represents the preliminary allocation of the purchase price by the assets and liabilities acquired and goodwill recognized in this business combination: Total consideration (net of cash acquired) $ 1,444,235 Less: Accounts receivable 162,684 Property and equipment 2,387 Customer relationships (a)(b) 842,700 Developed technologies (a)(c) 32,120 Trademarks and trade names (a)(d) 13,700 Deferred income tax assets 34,992 Accounts payable (153,777 ) Accrued expenses (128,267 ) Deferred income tax liabilities (91,194 ) Recorded goodwill (a) $ 728,890 (a) Approximately $1,273,927 in goodwill and other intangible assets recorded from this business combination were preliminarily allocated to our Fleet Solutions segment, the remaining $343,483 was preliminarily allocated to our Travel and Corporate Solutions segment. (b) Weighted average life – 8.1 years . (c) Weighted average life – 2.2 years . (d) Weighted average life – 7.7 years .
Estimated Amortization Expense Related to Definite Lived Intangible Assets	At December 31, 2016, 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: 2017 $ 85,541 2018 81,131 2019 74,674 2020 68,798 2021 60,750 Thereafter $ 481,523 The following table presents the estimated amortization expense related to the definite-lived intangible assets listed above for each of the next five fiscal years: 2017 $ 148,774 2018 130,586 2019 120,814 2020 110,269 2021 $ 98,260
Business Acquisition, Pro Forma Information	The following represents unaudited pro forma operational results as if Evolution1 had been included in the Company’s consolidated statements of income as of January 1, 2013: December 31, 2014 2013 Total revenues $ 865,056 $ 786,854 Net earnings attributable to shareholders $ 191,415 $ 97,016 Pro forma net income attributable to WEX Inc. per common share: Net income per share – basic $ 4.92 $ 2.49 Net income per share – diluted $ 4.91 $ 2.48 The following represents unaudited pro forma operational results as if EFS has been included in the Company's consolidated statements of income as of January 1, 2015: Year ended December 31, 2016 2015 Total revenues $ 1,089,880 $ 994,619 Net earnings attributable to shareholders $ 42,821 $ 36,763 Pro forma net income attributable to shareholders per common share: Basic $ 1.00 $ 0.86 Diluted $ 1.00 $ 0.86

Divestitures (Tables)

Divestitures (Tables)	12 Months Ended
	Dec. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures	The following is a summary of the allocation of the assets and liabilities sold: Consideration received $ 49,664 Less: Expenses associated with the sale 1,340 Accounts receivable 48,699 Accounts payable (53,001 ) Other tangible assets and liabilities, net 828 Customer relationships 3,727 Trademarks and trade name 1,444 Goodwill 19,137 Gain on sale $ 27,490

Accounts Receivable and Reser39

Accounts Receivable and Reserves for Credit Losses (Tables)	12 Months Ended
	Dec. 31, 2016
Receivables [Abstract]
Changes in Reserves for Credit Losses Related to Accounts Receivable	The following table presents changes in reserves for credit losses related to accounts receivable: Year ended December 31, 2016 2015 2014 Balance, beginning of year $ 13,832 $ 13,919 $ 10,396 Provision for credit losses 33,348 22,825 32,144 Charge-offs (33,665 ) (27,862 ) (35,302 ) Recoveries of amounts previously charged-off 6,201 5,202 6,832 Currency translation 376 (252 ) (151 ) Balance, end of year $ 20,092 $ 13,832 $ 13,919

Investments (Tables)

Investments (Tables)	12 Months Ended
	Dec. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Available-For-Sale Securities	The Company’s available-for-sale securities as of December 31, 2016 and 2015 , are presented below: Cost Gross Unrealized Gains Gross Unrealized Losses Fair Value (a) 2016 Mortgage-backed securities $ 498 $ 15 $ 23 $ 490 Asset-backed securities 650 — 2 648 Municipal bonds 697 1 16 682 Equity securities (b) 22,414 — 709 21,705 Total available-for-sale securities $ 24,259 $ 16 $ 750 $ 23,525 2015 Mortgage-backed securities $ 665 $ 16 $ 31 $ 650 Asset-backed securities 850 — 2 848 Municipal bonds 424 — 26 398 Equity securities (b) 16,961 — 295 16,666 Total available-for-sale securities $ 18,900 $ 16 $ 354 $ 18,562 (a) The Company’s techniques used to measure the fair value of its investments are discussed in Note 16, Fair Value. (b) Excludes $5,673 and $5,655 in equity securities designated as trading as of December 31, 2016 and 2015 , respectively, included in Other assets on the consolidated balance sheets. See Note 15 for additional information about the securities designated as trading.
Maturity Dates Of Available-For-Sale Securities	The maturity dates of the Company’s available-for-sale securities are as follows: December 31, 2016 2015 Cost Fair Value Cost Fair Value Due after 1 year through year 5 $ 165 $ 165 $ 315 $ 313 Due after 5 years through year 10 529 529 — — Due after 10 years 653 636 959 933 Mortgage-backed securities with original maturities of 30 years 498 490 665 650 Equity securities with no maturity dates 22,414 21,705 16,961 16,666 Total $ 24,259 $ 23,525 $ 18,900 $ 18,562

Property, Equipment and Capit41

Property, Equipment and Capitalized Software, Net (Tables)	12 Months Ended
	Dec. 31, 2016
Property, Plant and Equipment [Abstract]
Schedule Of Property, Equipment And Capitalized Software, Net	Property, equipment and capitalized software, net consist of the following: December 31, 2016 2015 Furniture, fixtures and equipment $ 69,513 $ 63,278 Computer software 254,163 212,504 Software under development 49,922 39,694 Leasehold improvements 21,257 14,492 Capital leases 759 757 Total 395,614 330,725 Less: accumulated depreciation and amortization (228,336 ) (192,140 ) Total property, equipment and capitalized software, net $ 167,278 $ 138,585

Goodwill and Other Intangible42

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Goodwill	The changes in goodwill during the period January 1 to December 31, 2016 were as follows: Fleet Solutions Segment Travel and Corporate Solutions Segment Health and Employee Benefit Solutions Segment Total Gross goodwill, January 1, 2016 $ 735,770 $ 38,134 $ 350,321 $ 1,124,225 Acquisition of EFS 561,119 167,771 — 728,890 Acquisition adjustments — — 502 502 Impact of foreign currency translation (3,751 ) (3,134 ) 2,899 (3,986 ) Gross goodwill, December 31, 2016 1,293,138 202,771 353,722 1,849,631 Accumulated impairment, January 1, 2016 (867 ) (10,480 ) — (11,347 ) Impact of foreign currency translation 12 145 — 157 Accumulated impairment, December 31, 2016 $ (855 ) $ (10,335 ) $ — $ (11,190 ) Net goodwill, January 1, 2016 $ 734,903 $ 27,654 $ 350,321 $ 1,112,878 Net goodwill, December 31, 2016 $ 1,292,283 $ 192,436 $ 353,722 $ 1,838,441 The changes in goodwill during the period January 1 to December 31, 2015 were as follows: Fleet Solutions Segment Travel and Corporate Solutions Segment Health and Employee Benefit Solutions Total Gross goodwill, January 1, 2015 $ 759,617 $ 40,251 $ 330,094 $ 1,129,962 Acquisition of Benaissance — — 38,767 38,767 Sale of subsidiaries (147 ) — (12,386 ) (12,533 ) Impact of foreign currency translation (23,700 ) (2,117 ) (6,154 ) (31,971 ) Gross goodwill, December 31, 2015 735,770 38,134 350,321 1,124,225 Accumulated impairment, January 1, 2015 (969 ) (11,712 ) — (12,681 ) Impact of foreign currency translation 102 1,232 — 1,334 Accumulated impairment, December 31, 2015 $ (867 ) $ (10,480 ) $ — $ (11,347 ) Net goodwill, January 1, 2015 $ 758,648 $ 28,539 $ 330,094 $ 1,117,281 Net goodwill, December 31, 2015 $ 734,903 $ 27,654 $ 350,321 $ 1,112,878
Changes in Other Intangible Assets	The changes in other intangible assets during the period January 1 to December 31, 2016 , were as follows: Net Carrying Amount, Beginning of Year Acquisitions Amortization Transfers (a) Impacts of Foreign Currency Translation Net Carrying Amount, End of Year Definite-lived intangible assets Acquired software and developed technology $ 114,012 $ 32,120 $ (32,109 ) $ — $ 3,993 $ 118,016 Customer relationships 297,904 842,700 (57,413 ) — (2,868 ) 1,080,323 Licensing agreements 27,398 — (5,070 ) — (694 ) 21,634 Non-compete agreement — 4,000 — — — 4,000 Patent 878 — (228 ) — 6 656 Trade name 13,144 13,700 (3,009 ) 11,000 (314 ) 34,521 Indefinite-lived intangible assets Trademarks, trade names and brand names 17,376 — — (11,000 ) (58 ) 6,318 Total $ 470,712 $ 892,520 $ (97,829 ) $ — $ 65 $ 1,265,468 (a) During the third quarter of 2016, management reevaluated a trade name assigned to the Health and Employee Benefit Solutions segment, which was previously believed to have an indefinite life. As result, it was determined it is now probable that the trade name will not be renewed upon its 2024 expiration date. As such, this intangible asset will be amortized over its seven -year remaining estimated useful life. The changes in other intangible assets during the period January 1 to December 31, 2015 , were as follows: Net Carrying Amount, Beginning of Year (a) Acquisitions Amortization Disposals Impacts of Foreign Currency Translation Net Carrying Amount, End of Year Definite-lived intangible assets Acquired software and developed technology (a) $ 119,509 $ 10,300 $ (9,844 ) $ — $ (5,953 ) $ 114,012 Customer relationships (a) 309,450 27,700 (32,468 ) (2,329 ) (4,449 ) 297,904 Licensing agreements 35,341 — (4,165 ) (164 ) (3,614 ) 27,398 Patent 1,245 — (243 ) — (124 ) 878 Trade name (a) 15,373 1,500 (1,072 ) (723 ) (1,934 ) 13,144 Indefinite-lived intangible assets Trademarks, trade names and brand names 16,379 — — — 997 17,376 Total $ 497,297 $ 39,500 $ (47,792 ) $ (3,216 ) $ (15,077 ) $ 470,712 (a) The prior year amounts have been adjusted to reflect changes as a result of finalizing the purchase accounting. See Note 3, Business Acquisitions and Other Intangible Asset Acquisitions.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense	At December 31, 2016, 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: 2017 $ 85,541 2018 81,131 2019 74,674 2020 68,798 2021 60,750 Thereafter $ 481,523 The following table presents the estimated amortization expense related to the definite-lived intangible assets listed above for each of the next five fiscal years: 2017 $ 148,774 2018 130,586 2019 120,814 2020 110,269 2021 $ 98,260
Other Intangible Assets	Other intangible assets consist of the following: December 31, 2016 December 31, 2015 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount Definite-lived intangible assets Acquired software and developed technology $ 187,499 $ (69,483 ) $ 118,016 $ 155,182 $ (41,170 ) $ 114,012 Customer relationships 1,247,624 (167,301 ) 1,080,323 403,382 (105,478 ) 297,904 Licensing agreements 30,760 (9,126 ) 21,634 31,903 (4,505 ) 27,398 Non-compete agreement 4,000 — 4,000 — — — Patent 2,380 (1,724 ) 656 2,413 (1,535 ) 878 Trade name 41,029 (6,508 ) 34,521 16,410 (3,266 ) 13,144 $ 1,513,292 $ (254,142 ) $ 1,259,150 $ 609,290 $ (155,954 ) $ 453,336 Indefinite-lived intangible assets Trademarks, trade names and brand names 6,318 17,376 Total $ 1,265,468 $ 470,712

Accounts Payable (Tables)

Accounts Payable (Tables)	12 Months Ended
	Dec. 31, 2016
Payables and Accruals [Abstract]
Schedule Of Accounts Payable	Accounts payable consists of: December 31, 2016 2015 Merchant payables $ 520,058 $ 313,244 Other payables 97,060 65,567 Accounts payable $ 617,118 $ 378,811

Deposits, Borrowed Federal Fu44

Deposits, Borrowed Federal Funds and Other Debt (Tables)	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Schedule Of Deposits	The following table presents information about deposits: December 31, 2016 2015 Certificates of deposit with maturities within 1 year $ 517,524 $ 97,859 Certificates of deposit with maturities greater than 1 year and less than 5 years 208,048 54,448 Interest-bearing money market deposits 325,464 369,191 Negotiable order of withdrawal deposits — 308,998 Customer deposits 67,787 40,022 Total deposits $ 1,118,823 $ 870,518 Weighted average cost of funds on certificates of deposit outstanding 0.96 % 0.90 % Weighted average cost of interest-bearing money market deposits 0.76 % 0.45 %
Schedule Of Average Interest Rates	The following table presents the average interest rates for deposits, borrowed federal funds and other debt: Year ended December 31, 2016 2015 2014 Average interest rate: Deposits 0.94 % 0.65 % 0.53 % Borrowed federal funds 0.69 % 0.39 % 0.38 % Interest-bearing money market deposits 0.50 % 0.25 % 0.23 % WEX Brazil debt 19.70 % 15.21 % 17.15 % Participation agreement 2.94 % 2.57 % 2.46 % Average deposits and borrowed federal funds balance $ 1,102,210 $ 1,026,963 $ 1,220,979 Average other debt (WEX Brazil and participation agreements) $ 92,684 $ 51,209 $ 37,876

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2016
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Notional Amounts of Outstanding Derivative Positions	The notional amounts, fixed and variable interest rates and maturities of the interest rate swap agreements are as follows: Tranche A Tranche B Tranche C Notional amount $400,000 $150,000 $250,000 Amortization 5% annually N/A N/A Maturity date 12/31/2020 12/31/2020 12/31/2018 Fixed interest rate 1.108% 1.125% 0.896%
Foreign Currency Swap	The following table summarizes the contracts related to its foreign currency swaps, which settle in U.S. dollars at various dates within 5 days after year-end: Aggregate Notional Amount December 31, 2016 2015 Australian dollar A$ 15,000 A$ 10,000 Euro € — € 10,000 Pound sterling £ — £ 5,000
Fair Value of Fuel Price Derivative Instrument In Consolidate Balance Sheet	The following table presents information about the Options: December 31, 2015 Put Strike (a) Call Strike (a) Aggregate (b) Fair Fuel price derivative instruments – unleaded fuel Options settling July 2015 – March 2016 $ 2.483 $ 2.543 2,655 $ 3,082 Options settling April 2015 – December 2015 2.620 2.680 — — Options settling January 2015 – September 2015 2.625 2.685 — — Options settling October 2014 – June 2015 2.568 2.628 — — Options settling July 2014 – March 2015 $ 2.510 $ 2.570 — — Total fuel price derivative instruments – unleaded fuel 2,655 $ 3,082 Fuel price derivative instruments – diesel Options settling July 2015 – March 2016 $ 3.724 $ 3.784 1,314 $ 1,925 Options settling April 2015 – December 2015 3.785 3.845 — — Options settling January 2015 – September 2015 3.795 3.855 — — Options settling October 2014 – June 2015 3.785 3.845 — — Options settling July 2014 – March 2015 $ 3.788 $ 3.848 — — Total fuel price derivative instruments – diesel 1,314 $ 1,925 Total fuel price derivative instruments 3,969 $ 5,007 (a) The settlement of the Options is based upon the New York Mercantile Exchange’s New York Harbor Reformulated Gasoline Blendstock for Oxgenate Blending and the U.S. Department of Energy’s weekly retail on-highway diesel fuel price for the month. (b) The Options settle on a monthly basis.
Net Realized And Unrealized Gains Losses On Derivative Instruments	The following table summarizes the changes in fair value of the fuel price derivatives which have been recorded on the consolidated statements of income: Year ended December 31, 2016 2015 2014 Realized gains (losses) $ 5,718 $ 41,810 $ (2,115 ) Change in unrealized fuel price derivatives (5,007 ) (35,962 ) 48,327 Net realized and unrealized gains on derivative instruments $ 711 $ 5,848 $ 46,212
Location and Amounts of Derivative Fair Values in Condensed Consolidated Balance Sheets	The following table presents information on the location and amounts of derivative fair values on the consolidated balance sheets, which are recorded at fair value: Asset Derivatives Liability Derivatives December 31, 2016 December 31, 2015 December 31, 2016 December 31, 2015 Derivatives Not Designated as Hedging Instruments Balance Fair Balance Fair Balance Fair Balance Fair Interest rate swaps Other assets $ 12,908 Other assets $ — Other liabilities $ — Other liabilities $ — Commodity contracts Fuel price — Fuel price 5,007 Fuel price — Fuel price — Foreign currency contracts Accounts receivable $ 29 Accounts receivable $ — Accounts payable $ — Accounts payable $ 90
Location and Amounts of Derivative Gains and Losses in Condensed Consolidated Statements of Income	The following table presents information on the location and amounts of derivative gains and losses: Derivatives Not Designated as Hedging Instruments Location of Gain Recognized in Amount of Gain Recognized in December 31, 2016 2015 2014 Foreign currency contracts Net foreign currency gain $ 59 $ 27,236 $ 15,398 Interest rate swap agreements Net unrealized gains on interest rate swap agreements $ 12,908 $ — $ — Commodity contracts Net realized and unrealized gains on fuel price derivatives $ 711 $ 5,848 $ 46,212

Financing Debt (Tables)

Financing Debt (Tables)	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Summary of Annual Principal Payments	The table below summarizes the Company's annual principal payments on long-term debt for each of the next five fiscal years: 2017 $ 34,750 2018 34,750 2019 34,750 2020 34,750 2021 $ 364,625
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: Year ended December 31, 2016 2015 Revolving line of credit facilities and term loans $ 38,334 $ 4,837 Notes outstanding $ 4,466 $ 5,200

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Components Of Income Before Income Taxes	Income (losses) before income taxes consisted of the following: Year ended December 31, 2016 2015 2014 United States $ 32,622 $ 203,692 $ 329,633 Foreign 54,479 (18,784 ) (27,994 ) Total $ 87,101 $ 184,908 $ 301,639
Components Of Income Tax Expense (Benefit)	Income tax expense (benefit) from continuing operations consisted of the following for the years ended December 31: United States State Foreign Total 2016 Current $ (1,232 ) $ 3,033 $ 8,325 $ 10,126 Deferred $ 21,565 $ (5,106 ) $ 3,040 $ 19,499 2015 Current $ 22,570 $ 4,288 $ 9,173 $ 36,031 Deferred $ 37,553 $ 5,631 $ (3,919 ) $ 39,265 2014 Current $ 43,565 $ 3,326 $ 8,009 $ 54,900 Deferred $ 51,581 $ 3,979 $ (8,839 ) $ 46,721
Reconciliation Of Provision Of Income Taxes	The reconciliation between the income tax computed by applying the U.S. federal statutory rate and the reported effective tax rate on income from continuing operations is as follows: Year ended December 31, 2016 2015 2014 Federal statutory rate 35.0 % 35.0 % 35.0 % State income taxes (net of federal income tax benefit) 1.1 2.5 1.6 Foreign income tax rate differential (4.4 ) 1.4 1.1 Revaluation of deferred tax assets for tax rate changes and blending differences, net (0.9 ) 0.7 (0.1 ) Research and development credit (0.5 ) 0.2 (0.6 ) Release of tax reserves (4.9 ) — — Withholding taxes 0.3 — — Domestic production exclusions — (1.8 ) (4.0 ) Change in valuation allowance 2.3 1.6 0.1 Nondeductible expenses 3.4 0.3 — Other 2.6 0.8 0.6 Effective tax rate 34.0 % 40.7 % 33.7 %
Deferred Tax Assets And Liabilities	The tax effects of temporary differences in the recognition of income and expense for tax and financial reporting purposes that give rise to significant portions of the deferred tax assets and the deferred tax liabilities are presented below: December 31, 2016 2015 Deferred assets related to: Reserve for credit losses $ 7,122 $ 5,310 Tax credit carryforwards 5,178 4,686 Stock-based compensation, net 12,729 9,150 Net operating loss carryforwards 56,501 22,797 Pension 944 — Accruals 23,461 5,992 Unrealized losses 164 2,647 Total 106,099 50,582 Deferred tax liabilities related to: Unrealized gains — 1,876 Other liabilities 643 1,226 Property, equipment and capitalized software 32,759 20,861 Intangibles, net 118,695 94,814 Investment in partnership 94,354 — Pension — 600 Total 246,451 119,377 Valuation allowance primarily on net operating loss carryforwards 5,620 4,814 Deferred income taxes, net $ (145,972 ) $ (73,609 )
Net Deferred Tax Assets By Jurisdiction	Net deferred tax (liabilities) assets by jurisdiction are as follows: December 31, 2016 2015 United States $ (148,389 ) $ (76,308 ) Australia (2,020 ) (6,153 ) New Zealand 183 252 The Netherlands 206 230 United Kingdom 6,474 9,623 Brazil (2,497 ) (1,253 ) Canada 71 — Total $ (145,972 ) $ (73,609 )
Reconciliation Of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of unrecognized tax benefits excluding interest and penalties is as follows: Year ended December 31, 2016 2015 2014 Beginning balance $ 4,776 $ 4,856 $ 5,283 Increases related to prior year tax positions 4,960 431 — Decreases related to prior year tax positions, due to foreign currency exchange — (511 ) (427 ) Decreases related to prior year tax positions (431 ) — — Lapse of statute (4,345 ) — — Ending balance $ 4,960 $ 4,776 $ 4,856

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2016
Fair Value Disclosures [Abstract]
Assets And Liabilities Measured At Fair Value	The following table presents the Company’s assets and liabilities that are measured at fair value and the related hierarchy levels for 2016 and 2015 : December 31, Fair Value Hierarchy 2016 2015 Assets: Mortgage-backed securities 2 $ 490 $ 650 Asset-backed securities 2 648 848 Municipal bonds 2 682 398 Equity securities 1 21,705 16,666 Total available-for-sale securities $ 23,525 $ 18,562 Executive deferred compensation plan trust (a) 1 $ 5,673 $ 5,655 Fuel price derivatives – unleaded fuel (b) 2 $ — $ 3,083 Fuel price derivatives – diesel (b) 3 — 1,924 Total fuel price derivatives $ — $ 5,007 Interest rate swaps (a) 2 $ 12,908 $ — Foreign currency swaps (c) 2 $ 29 $ — Liabilities: Foreign currency swaps (d) 2 $ — $ 90 (a) The fair value of these instruments is recorded in Other assets. (b) The consolidated balance sheet presentation combines unleaded fuel and diesel fuel positions. (c) The fair value of these instruments is recorded in Accounts receivable. (d) The fair value of these instruments is recorded in Accounts payable.
Quantitative Information About Level Three Fair Value Measurements	The significant unobservable inputs used in the fair value measurement of the Company’s diesel fuel price derivative instruments designated as Level 3 were as follows: Fair Value at Valuation Technique Unobservable Input Range $ per gallon Fuel price derivatives – diesel $ 1,924 Option model Future retail price of diesel 3.72 – 3.78
Reconciliation Of Beginning And Ending Balances For Assets And Liabilities Measured At Fair Value On Recurring Basis Using Significant Unobservable Inputs	The following table presents a reconciliation of the beginning and ending balances for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the years ended December 31, 2016 and 2015: December 31, Fuel Price Derivatives – Diesel 2016 2015 Beginning balance $ 1,924 $ 11,848 Total gains or (losses) – realized/unrealized Included in earnings (a) (1,924 ) (9,924 ) Ending balance $ — $ 1,924 (a) Gains and losses for the years ended December 31, 2016 and 2015, are reported in Net realized and unrealized gains and (losses) on fuel price derivatives in the consolidated statements of income.

Non-controlling Interest (Table

Non-controlling Interest (Tables)	12 Months Ended
	Dec. 31, 2016
Noncontrolling Interest [Abstract]
Redeemable noncontrolling interest	A reconciliation of redeemable non-controlling interest for the year ended December 31, 2015 , is as follows: Beginning balance $ 16,590 Net income attributable to redeemable non-controlling interest 1,190 Currency translation adjustment (4,210 ) Accretion to redemption value 9,413 Excess purchase amount over redemption value 23,035 Purchase of non-controlling interest (46,018 ) Ending balance $ —
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block]	A reconciliation of non-controlling interest for the years ended December 31, 2016 and 2015 is as follows: 2016 2015 Beginning balance $ 12,437 $ 17,396 Net loss attributable to non-controlling interest (3,161 ) (2,896 ) Currency translation adjustment (718 ) (2,063 ) Ending balance $ 8,558 $ 12,437

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Schedule of Future Minimum Lease Payments	Future minimum lease payments under non-cancelable operating leases are as follows: 2017 $ 11,495 2018 9,276 2019 6,429 2020 5,354 2021 4,593 Thereafter 14,924 Total minimum lease payments $ 52,071

Accumulated Other Comprehensi51

Accumulated Other Comprehensive Loss (Tables)	12 Months Ended
	Dec. 31, 2016
Equity [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	A reconciliation of accumulated other comprehensive loss for the years ended December 31, 2016 and 2015 , is as follows: 2016 2015 Unrealized Losses on Available- for-Sale Securities Foreign Currency Items Unrealized Losses on Available- for-Sale Securities Foreign Currency Items Beginning balance $ (212 ) $ (103,239 ) $ (129 ) $ (50,452 ) Other comprehensive loss (251 ) (19,137 ) (83 ) (43,679 ) Purchase of redeemable non-controlling interest — — — (9,108 ) Ending balance $ (463 ) $ (122,376 ) $ (212 ) $ (103,239 )

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary Of Restricted Stock Units	A summary of the status of the Company’s RSUs as of December 31, 2016 , and changes during the year then ended is presented below: Units Weighted- Average per share Grant- Date Fair Value Restricted Stock Units Balance at January 1, 2016 99 $ 94.51 Granted 209 90.24 Vested – shares issued (61 ) 94.93 Vested – shares deferred (a) (2 ) 87.08 Forfeited (11 ) 87.22 Withheld for taxes (b) (28 ) 96.40 Balance at December 31, 2016 206 $ 88.78 (a) The Company issued fully vested and non-forfeitable restricted stock units to certain non-employee directors and certain employees that are payable in shares of the Company’s common stock at a later date as specified by the award (deferred stock units or “DSUs”). (b) The Company withholds shares of common stock to pay the minimum required statutory taxes due upon RSU vesting. Cash is then remitted by the Company to the appropriate taxing authority.
Summary Of Deferred Stock Units	A summary of the status of the Company’s DSUs as of December 31, 2016 , and changes during the year is presented below: Units Weighted- Average per share Grant-Date Fair Value Deferred Stock Units Balance at January 1, 2016 98 $ 30.59 Awards 1 84.52 Converted from RSUs 2 87.08 Balance at December 31, 2016 101 $ 32.12
Summary Of Performance Based Restricted Stock Units	A summary of the status of certain of the Company’s PBRSUs at threshold and target performance as of December 31, 2016 , and changes during the year then ended is presented below: Units at Threshold Units at Target Units at Maximum Weighted- Average per share Grant-Date Fair Value Performance Based Restricted Stock Units Balance at January 1, 2016 71 188 363 $ 96.16 Granted 95 197 389 80.84 Forfeited / Canceled (4 ) (10 ) (19 ) 85.46 Converted to RSUs (40 ) (65 ) (119 ) 105.30 Balance at December 31, 2016 122 310 614 $ 84.83
Schedule Of Assumptions Used	The table below summarizes the assumptions used to calculate the fair value: March 15, 2016 March 15, 2015 August 31, 2015 Weighted average expected life (in years) 6.0 6.0 5.77 Weighted average exercise price $ 77.20 $ 103.75 $ 94.53 Weighted average volatility 31.93 % 30.53 % 28.73 % Weighted average risk-free rate 1.62 % 1.73 % 1.66 % Weighted average fair value $ 26.14 $ 34.13 $ 28.90
Summary Of Stock Option Plan	The stock options granted under the plan related to the Company’s employees consisted of: Shares Weighted- Average per share Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value Stock Options Outstanding at January 1, 2016 81 $ 71.50 Granted 126 77.20 Exercised (22 ) 13.96 Forfeited or expired (5 ) 87.38 Outstanding at December 31, 2016 180 $ 81.90 8.57 $ 5,347 Exercisable on December 31, 2016 23 $ 75.58 5.69 $ 833 Vested and expected to vest at December 31, 2016 172 $ 82.00 8.54 $ 5,081

Restructuring (Tables)

Restructuring (Tables)	12 Months Ended
	Dec. 31, 2016
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs	The following table presents the Company's 2015 Restructuring Initiative liability for the years ended December 31, 2016 and 2015 : 2016 2015 Beginning balance $ 7,249 $ — Restructuring charges 2,182 9,038 Reserve release (816 ) (28 ) Cash paid (3,921 ) (1,433 ) Other (166 ) — Impact of foreign currency translation 703 (328 ) Ending balance $ 5,231 $ 7,249 The following table presents the Company's 2016 Restructuring Initiative liability for the year ended December 31, 2016 : 2016 Beginning balance $ — Restructuring charges 3,506 Reserve release — Cash paid (4 ) Other 166 Impact of foreign currency translation (6 ) Ending balance $ 3,662 The following table presents the Company's Acquisition Integration Restructuring Initiative liability for the year ended December 31, 2016 : 2016 Beginning balance $ — Restructuring charges 2,614 Cash paid (850 ) Ending balance $ 1,764 The following table presents the Company's total restructuring liability for the years ended December 31, 2016 and 2015 : 2016 2015 Beginning balance $ 7,249 $ — Restructuring charges 8,302 9,038 Reserve release (816 ) (28 ) Cash paid (4,775 ) (1,433 ) Impact of foreign currency translation 697 (328 ) Ending balance $ 10,657 $ 7,249

Segment Information (Tables)

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Interest Income	The following table presents the Company's interest income by segment for the years ended December 31, 2016 , 2015 and 2014 : 2016 2015 2014 Fleet Solutions $ 3,053 $ 1,704 $ 1,853 Travel and Corporate Solutions 498 348 96 Health and Employee Benefit Solutions 13,581 5,116 4,717 Total interest income $ 17,132 $ 7,168 $ 6,666
Reportable Segment Results	The following tables present the Company’s reportable segment results on an adjusted pre-tax net income before NCI basis for the years ended December 31, 2016 , 2015 and 2014 : 2016 2015 2014 Fleet Solutions Payment processing revenue $ 297,900 $ 305,855 $ 357,050 Account servicing revenue 127,106 100,850 81,217 Finance fee revenue 124,725 83,554 75,703 Other revenue 92,330 57,419 54,373 Total Fleet Solutions revenue $ 642,061 $ 547,678 $ 568,343 Total Fleet Solutions operating interest expense $ 3,476 $ 1,869 $ 2,910 Total Fleet Solutions depreciation and amortization $ 100,860 $ 54,453 $ 54,789 Total Fleet Solutions adjusted pre-tax income before NCI $ 175,162 $ 199,319 $ 206,367 2016 2015 2014 Travel and Corporate Solutions Payment processing revenue $ 175,762 $ 151,311 $ 141,368 Account servicing revenue 1,247 1,930 1,647 Finance fee revenue 643 326 438 Other revenue 37,595 41,852 39,513 Total Travel and Corporate Solutions revenue $ 215,247 $ 195,419 $ 182,966 Total Travel and Corporate Solutions operating interest expense $ 2,969 $ 1,218 $ 410 Total Travel and Corporate Solutions depreciation and amortization $ 6,187 $ 2,999 $ 1,911 Total Travel and Corporate Solutions adjusted pre-tax income before NCI $ 103,167 $ 73,510 $ 87,664 2016 2015 2014 Health and Employee Benefit Solutions Payment processing revenue $ 46,957 $ 38,703 $ 21,569 Account servicing revenue 82,660 53,912 32,645 Finance fee revenue 13,572 5,113 4,742 Other revenue 17,963 13,812 7,383 Total Health and Employee Benefit Solutions revenue $ 161,152 $ 111,540 $ 66,339 Total Health and Employee Benefit Solutions operating interest expense $ 5,941 $ 2,541 $ 3,117 Total Health and Employee Benefit Solutions depreciation and amortization $ 34,604 $ 25,625 $ 13,680 Total Health and Employee Benefit Solutions adjusted pre-tax income before NCI $ 19,762 $ 28,576 $ 11,307
Reconciliation Of Adjusted Net Income To Net Income	The following table reconciles income before income taxes to adjusted pre-tax income before NCI: Year ended December 31, 2016 2015 2014 Income before income taxes $ 87,101 $ 184,908 $ 301,639 Unrealized (gains) losses on derivative instruments (7,901 ) 35,962 (48,327 ) Net foreign currency remeasurement loss 7,665 5,689 13,438 Acquisition and divestiture related items 148,753 50,714 20,826 Stock-based compensation 19,742 12,420 13,790 Restructuring and other costs 13,995 9,010 — Vendor settlement 15,500 — — Debt restructuring and debt issuance cost amortization 12,673 3,097 2,641 Non-cash adjustments related to tax receivable agreement 563 (2,145 ) 1,331 Regulatory reserve — 1,750 — Adjusted pre-tax income before NCI $ 298,091 $ 301,405 $ 305,338
Schedule Of Revenue By Geographic Data	Revenue by principal geographic area, based on the country in which the sale originated, was as follows: Year ended December 31, 2016 2015 2014 Revenues: United States $ 839,917 $ 691,088 $ 708,827 Australia 53,068 50,387 57,897 Other international 125,475 113,162 50,923 Total revenues $ 1,018,460 $ 854,637 $ 817,647 Net property, equipment and capitalized software are subject to geographic risks because they are generally difficult to move and relatively illiquid. Net property, equipment and capitalized software by principal geographic area was as follows: Year ended December 31, 2016 2015 2014 Property, equipment and capitalized software, net: United States $ 146,165 $ 79,265 $ 72,334 Australia 5,493 5,445 6,280 Other international 15,620 53,875 26,982 Total property, equipment and capitalized software, net $ 167,278 $ 138,585 $ 105,596

Supplementary Regulatory Capi55

Supplementary Regulatory Capital Disclosure (Tables)	12 Months Ended
	Dec. 31, 2016
Banking and Thrift [Abstract]
Schedule of Compliance with Regulatory Capital Requirements under Banking Regulations	WEX Bank's actual and regulatory minimum capital amounts and ratios as of December 31, 2016 and 2015 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 2016 Total Capital to risk-weighted assets $ 228,402 12.59 % $ 145,182 8.00 % $ 181,477 10.00 % Tier 1 Capital to average assets 214,847 11.10 % 77,413 4.00 % 96,767 5.00 % Common equity to risk-weighted assets 214,847 11.84 % 81,665 4.50 % 117,961 6.50 % Tier 1 Capital to risk-weighted assets $ 214,847 11.84 % $ 108,887 6.00 % $ 145,183 8.00 % 2015 Total Capital to risk-weighted assets $ 202,294 15.50 % $ 104,437 8.00 % $ 130,547 10.00 % Tier 1 Capital to average assets 193,337 11.23 % 68,865 4.00 % 86,082 5.00 % Common equity to risk-weighted assets 193,337 14.81 % 58,746 4.50 % 84,855 6.50 % Tier 1 Capital to risk-weighted assets $ 193,337 14.81 % $ 78,328 6.00 % $ 104,437 8.00 %

Quarterly Financial Results (56

Quarterly Financial Results (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Summary Of Quarterly Financial Results	Summarized quarterly results for the years ended December 31, 2016 and 2015 , are as follows: Three months ended March 31 June 30 September 30 December 31 2016 Total revenues (a) $ 205,928 $ 233,936 $ 287,756 $ 290,840 Operating income (a) $ 41,127 $ 51,635 $ 54,568 $ 47,798 Net earnings attributable to shareholders (a) $ 23,086 $ 12,567 $ 19,696 $ 5,288 Earnings per share: (a) Basic $ 0.60 $ 0.32 $ 0.46 $ 0.12 Diluted $ 0.59 $ 0.32 $ 0.46 $ 0.12 2015 Total revenues $ 202,285 $ 213,653 $ 226,057 $ 212,642 Operating income $ 48,240 $ 62,918 $ 67,745 $ 49,890 Net earnings attributable to shareholders $ 22,345 $ 26,492 $ 32,166 $ 20,901 Earnings per share: Basic $ 0.58 $ 0.68 $ 0.83 $ 0.54 Diluted $ 0.57 $ 0.68 $ 0.83 $ 0.54 (a) Results for three months ended September 30, 2016 and December 31, 2016 include the operations of EFS and the issuance of approximately 4,000 shares of common stock for the acquisition of EFS on July 1, 2016.

Summary of Significant Accoun57

Summary of Significant Accounting Policies - Schedule of Error Corrections and Prior Period Adjustments (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other assets	$ 341,638	$ 215,544
Total assets	5,997,097	3,847,909
Revolving line-of-credit facilities and term loan, net	1,599,291	664,918
Notes outstanding, net		394,800
Total liabilities	4,491,350	2,752,228
Total liabilities and stockholders’ equity	$ 5,997,097	3,847,909
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other assets		225,581
Total assets		3,857,946
Revolving line-of-credit facilities and term loan, net		669,755
Notes outstanding, net		400,000
Total liabilities		2,762,265
Total liabilities and stockholders’ equity		3,857,946
Effect of Accounting Principle Adoption
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other assets		(10,037)
Total assets		(10,037)
Revolving line-of-credit facilities and term loan, net		(4,837)
Notes outstanding, net		(5,200)
Total liabilities		(10,037)
Total liabilities and stockholders’ equity		$ (10,037)

Summary of Significant Accoun58

Summary of Significant Accounting Policies - Schedule of Glossary of Terms in Document (Details) - Senior Notes - USD ($)	Dec. 31, 2016	Jan. 30, 2013
Debt Instrument [Line Items]
Debt instrument, aggregate principal amount	$ 400,000,000
Debt instrument, stated rate	4.75%	4.75%

Summary of Significant Accoun59

Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)	Nov. 30, 2016agreement
Business Acquisition [Line Items]
Restricted cash	$ 22,412	$ 17,783
Offset of waived finance fees	$ 10,922	$ 6,013	$ 6,002
Interest rate swaps
Business Acquisition [Line Items]
Interest rate swap agreements | agreement				3

Summary of Significant Accoun60

Summary of Significant Accounting Policies - Estimated Useful Lives (Details)	12 Months Ended
	Dec. 31, 2016
Furniture, fixtures and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful lives	3 years
Furniture, fixtures and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful lives	5 years
Software under development
Property, Plant and Equipment [Line Items]
Property and equipment useful lives	3 years
Computer software | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment useful lives	18 months
Computer software | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful lives	7 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment useful lives	5 years

Summary of Significant Accoun61

Summary of Significant Accounting Policies - Summary of Capitalized Software (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Amounts capitalized for internal-use computer software (including work-in-process)	$ 55,379	$ 52,218	$ 34,053
Amounts expensed for amortization of internal-use computer software	$ 27,581	$ 20,316	$ 18,661

Summary of Significant Accoun62

Summary of Significant Accounting Policies - Income Available for Common Stockholders Used to Calculate Earnings Per Share (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Net earnings attributable and available for common stockholders –Basic and Diluted	$ 60,637	$ 101,904	$ 202,211

Summary of Significant Accoun63

Summary of Significant Accounting Policies - Weighted Average Common Shares Outstanding Used to Calculate Earnings Per Share (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Weighted average common shares outstanding – Basic (in shares)	40,809	38,771	38,890
Dilutive impact of share based compensation awards (in shares)	105	72	110
Weighted average common shares outstanding – Diluted (in shares)	40,914	38,843	39,000

Recent Accounting Pronounceme64

Recent Accounting Pronouncements (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sales commissions	$ 20
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	14.00%
Percentage of consolidated revenue affected by new accounting pronouncement	48.00%

Business Acquisitions and Oth65

Business Acquisitions and Other Intangible Assets Acquisitions - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Combinations [Abstract]
Expenses related to acquisitions	$ 19,168	$ 342	$ 7,694

Business Acquisitions and Oth66

Business Acquisitions and Other Intangible Assets Acquisitions - Summary of EFS Acquisition (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 01, 2016	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Consideration transferred, shares, amount			$ 354,953	$ 0	$ 0
Less:
Recorded goodwill		$ 1,838,441	1,838,441	1,112,878	1,117,281
Estimated amortization expense related to the definite-lived intangible assets
2,017		148,774	148,774
2,018		130,586	130,586
2,019		120,814	120,814
2,020		110,269	110,269
2,021		98,260	98,260
Travel and Corporate Solutions
Less:
Recorded goodwill		192,436	192,436	27,654	28,539
Fleet solutions
Less:
Recorded goodwill		1,292,283	1,292,283	734,903	$ 758,648
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		591,000	591,000
Consideration paid, net of cash acquired	$ 1,444,235
Less:
Accounts receivable	162,684
Property and equipment	2,387
Deferred income tax assets	34,992
Accounts payable	(153,777)
Accrued expenses	(128,267)
Deferred income tax liabilities	(91,194)
Recorded goodwill	728,890
Estimated amortization expense related to the definite-lived intangible assets
2,017		85,541	85,541
2,018		81,131	81,131
2,019		74,674	74,674
2,020		68,798	68,798
2,021		60,750	60,750
Thereafter		481,523	481,523
Unaudited pro forma operational results
Total revenues			1,089,880	994,619
Net earnings attributable to shareholders			$ 42,821	$ 36,763
Pro forma net income attributable to WEX Inc. per common share:
Basic (in dollars per share)			$ 1	$ 0.86
Diluted (in dollars per share)			$ 1	$ 0.86
Electronic Funds Source LLC | Travel and Corporate Solutions
Less:
Recorded goodwill	343,483
Electronic Funds Source LLC | Fleet solutions
Less:
Recorded goodwill	1,273,927
Estimated amortization expense related to the definite-lived intangible assets
Total revenues		83,000
Pre-tax adjusted net income		$ 5,800
Electronic Funds Source LLC | Acquisition-related Costs
Unaudited pro forma operational results
Net earnings attributable to shareholders	19,168
Electronic Funds Source LLC | Extinguishment of Debt Related Expense
Unaudited pro forma operational results
Net earnings attributable to shareholders	7,074
Electronic Funds Source LLC | Customer relationships
Less:
Intangible assets	$ 842,700
Weighted average life	8 years 1 month 6 days
Electronic Funds Source LLC | Developed technologies
Less:
Intangible assets	$ 32,120
Weighted average life	2 years 2 months 12 days
Electronic Funds Source LLC | Trade name
Less:
Intangible assets	$ 13,700
Weighted average life	7 years 8 months 12 days

Business Acquisitions and Oth67

Business Acquisitions and Other Intangible Assets Acquisitions - Summary of Benaissance Acquisition (Details) - USD ($) $ in Thousands	Nov. 18, 2015	Dec. 31, 2015	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Consideration paid (net of cash acquired)				$ 1,089,282	$ 80,677	$ 891,725
Less:
Recorded goodwill		$ 1,112,878		$ 1,838,441	$ 1,112,878	$ 1,117,281
Benaissance
Business Acquisition [Line Items]
Consideration transferred	$ 80,677
Adjustments, tangible assets			$ 502
Increase (decrease) in goodwill			$ 502
Revenues		2,085
Net income		$ 399
Consideration paid (net of cash acquired)	80,677
Less:
Accounts receivable	1,594
Other tangible assets and liabilities, net	314
Recorded goodwill	39,269
Benaissance | Acquired software and developed technology
Less:
Finite-lived intangible assets	10,300
Weighted average life		5 years
Benaissance | Customer relationships
Less:
Finite-lived intangible assets	27,700
Weighted average life		7 years 7 months 6 days
Benaissance | Trade name
Less:
Finite-lived intangible assets	$ 1,500
Weighted average life		8 years 1 month 6 days

Business Acquisitions and Oth68

Business Acquisitions and Other Intangible Assets Acquisitions - Summary of UNIK Acquisition (Details) - USD ($) $ in Thousands	Aug. 31, 2015	Dec. 31, 2015	Aug. 30, 2012
Business Acquisition [Line Items]
Purchase of redeemable non-controlling interest		$ 46,018
Unik Financial Services
Business Acquisition [Line Items]
Percent of ownership interest acquired	49.00%		51.00%
Purchase of redeemable non-controlling interest	$ 46,018

Business Acquisitions and Oth69

Business Acquisitions and Other Intangible Assets Acquisitions - Summary of Esso Acquisition (Details) $ in Thousands	Dec. 01, 2014USD ($)Country	Dec. 31, 2014USD ($)	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Sep. 30, 2014USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Business Acquisition [Line Items]
Consideration paid (net of cash acquired)												$ 1,089,282	$ 80,677	$ 891,725
Net revenues			$ 290,840	$ 287,756	$ 233,936	$ 205,928	$ 212,642	$ 226,057	$ 213,653	$ 202,285		1,018,460	854,637	817,647
Net losses attributable to WEX Inc.			(5,288)	$ (19,696)	$ (12,567)	$ (23,086)	(20,901)	$ (32,166)	$ (26,492)	$ (22,345)		(60,637)	(111,317)	(202,211)
Less:
Goodwill		$ 1,117,281	$ 1,838,441				$ 1,112,878					$ 1,838,441	1,112,878	$ 1,117,281
ESSO Portfolio
Business Acquisition [Line Items]
Percent of ownership interest acquired	75.00%
Consideration paid (net of cash acquired)	$ 379,458
Payments to acquire business											$ 80,000
Number of Countries in which Entity Operates | Country	9
Increase in goodwill													537
Decrease in accounts receivable													(2)
Increase in other tangible assets and liabilities													213
Net revenues		3,428
Net losses attributable to WEX Inc.		$ 7,172
Less:
Accounts receivable	$ 303,376
Other tangible assets and liabilities, net	(8,497)
Goodwill	40,628
ESSO Portfolio | Customer relationships
Business Acquisition [Line Items]
Decrease in licensing agreements intangible asset													374
Less:
Finite-lived intangible assets	$ 7,346
Weighted average life	7 years 2 months 12 days
ESSO Portfolio | Licensing agreements
Business Acquisition [Line Items]
Decrease in licensing agreements intangible asset													$ 374
Less:
Finite-lived intangible assets	$ 36,605
Weighted average life	4 years 7 months 6 days

Business Acquisitions and Oth70

Business Acquisitions and Other Intangible Assets Acquisitions - Summary of Evolution1 Acquisition (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 16, 2014	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Net revenues		$ 290,840	$ 287,756	$ 233,936	$ 205,928	$ 212,642	$ 226,057	$ 213,653	$ 202,285		$ 1,018,460	$ 854,637	$ 817,647
Net losses attributable to WEX Inc.		(5,288)	$ (19,696)	$ (12,567)	$ (23,086)	(20,901)	$ (32,166)	$ (26,492)	$ (22,345)		(60,637)	(111,317)	(202,211)
Consideration paid (net of cash acquired)											1,089,282	80,677	891,725
Less:
Recorded goodwill		$ 1,838,441				$ 1,112,878				$ 1,117,281	$ 1,838,441	$ 1,112,878	1,117,281
Evolution1
Business Acquisition [Line Items]
Payments to acquire business	$ 532,174
Increase in goodwill													379
Decrease in tangible assets and liabilities													127
Increase in deferred income tax liabilities													252
Net revenues										35,976
Net losses attributable to WEX Inc.										$ 512
Consideration paid (net of cash acquired)	532,174
Less:
Accounts receivable	8,418
Accounts payable	(175)
Deferred tax liabilities, net	(68,768)
Other tangible assets and liabilities, net	(3,712)
Recorded goodwill	296,511
Unaudited pro forma operational results
Total revenues													865,056	$ 786,854
Net earnings attributable to shareholders													$ 191,415	$ 97,016
Pro forma net income attributable to WEX Inc. per common share:
Net income per share - basic (in dollars per share)													$ 4.92	$ 2.49
Net income per share - diluted (in dollars per share)													$ 4.91	$ 2.48
Evolution1 | Acquired software and developed technology
Less:
Finite-lived intangible assets	$ 70,000
Weighted average life	6 years 4 months 24 days
Evolution1 | Customer relationships
Less:
Finite-lived intangible assets	$ 211,000
Weighted average life	9 years 8 months 12 days
Evolution1 | Trademarks and trade name
Less:
Finite-lived intangible assets	$ 7,900
Indefinite-lived intangible assets	$ 11,000
Weighted average life	9 years 10 months 24 days

Divestitures - Additional Infor

Divestitures - Additional Information (Details) - USD ($) $ in Thousands	Jan. 07, 2015	Jul. 29, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Debt restructuring and debt issuance cost amortization			$ 0	$ 1,215	$ 27,490
Rapid Paycard
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration received	$ 20,000
Debt restructuring and debt issuance cost amortization	$ 1,215
Pacific Pride
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration received		$ 49,664
Debt restructuring and debt issuance cost amortization		$ 27,490

Divestitures - Summary of Sale

Divestitures - Summary of Sale of Pacific Pride LLC (Details) - USD ($) $ in Thousands	Jul. 29, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Less:
Gain on sale		$ 0	$ 1,215	$ 27,490
Pacific Pride
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration received	$ 49,664
Less:
Expenses associated with the sale	1,340
Accounts receivable	48,699
Accounts payable	(53,001)
Other tangible assets and liabilities, net	828
Goodwill	19,137
Gain on sale	27,490
Pacific Pride | Customer relationships
Less:
Intangible assets	3,727
Pacific Pride | Trademarks and trade name
Less:
Intangible assets	$ 1,444

Accounts Receivable and Reser73

Accounts Receivable and Reserves for Credit Losses - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Trade receivable payments terms	30 days
Threshold period past due for write-off of trade accounts receivable	150 days
Percentage of trade receivables outstanding balance, current	93.00%	86.00%
Accounts receivable, net	$ 2,200,000	$ 1,600,000
Percent of total, outstanding balances within 60 days	98.00%	97.00%
Accounts receivable | Customer Concentration Risk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of outstanding receivables	11.00%	11.00%
Revolving Credit Facility
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, net	$ 3,400	$ 1,100

Accounts Receivable and Reser74

Accounts Receivable and Reserves for Credit Losses - Changes in Reserves for Credit Losses Related to Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of year	$ 13,832	$ 13,919	$ 10,396
Provision for credit losses	33,348	22,825	32,144
Charge-offs	(33,665)	(27,862)	(35,302)
Recoveries of amounts previously charged-off	6,201	5,202	6,832
Currency translation	376	(252)	(151)
Balance, end of year	$ 20,092	$ 13,832	$ 13,919

Investments - Available-For-Sal

Investments - Available-For-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 24,259	$ 18,900
Gross Unrealized Gains	16	16
Gross Unrealized Losses	750	354
Fair Value	23,525	18,562
Equity securities designated as trading	5,673	5,655
Mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Cost	498	665
Gross Unrealized Gains	15	16
Gross Unrealized Losses	23	31
Fair Value	490	650
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Cost	650	850
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2	2
Fair Value	648	848
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Cost	697	424
Gross Unrealized Gains	1	0
Gross Unrealized Losses	16	26
Fair Value	682	398
Equity securities
Schedule of Available-for-sale Securities [Line Items]
Cost	22,414	16,961
Gross Unrealized Gains	0	0
Gross Unrealized Losses	709	295
Fair Value	$ 21,705	$ 16,666

Investments - Additional Inform

Investments - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Investments, Debt and Equity Securities [Abstract]
Maturities of available-for-sale securities	$ 495	$ 594	$ 337

Investments - Maturity Dates Of

Investments - Maturity Dates Of Available-For-Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Cost
Due after 1 year through year 5	$ 165	$ 315
Due after 5 years through year 10	529	0
Due after 10 years	653	959
Mortgage-backed securities with original maturities of 30 years	498	665
Equity securities with no maturity dates	22,414	16,961
Total	24,259	18,900
Fair Value
Due after 1 year through year 5	165	313
Due after 5 years through year 10	529	0
Due after 10 years	636	933
Mortgage-backed securities with original maturities of 30 years	490	650
Equity securities with no maturity dates	21,705	16,666
Total	$ 23,525	$ 18,562

Property, Equipment and Capit78

Property, Equipment and Capitalized Software, Net - Schedule Of Property, Equipment And Capitalized Software, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, equipment and capitalized software, gross	$ 395,614	$ 330,725
Less: accumulated depreciation and amortization	(228,336)	(192,140)
Total property, equipment and capitalized software, net	167,278	138,585	$ 105,596
Furniture, fixtures and equipment
Property, Plant and Equipment [Line Items]
Property, equipment and capitalized software, gross	69,513	63,278
Computer software
Property, Plant and Equipment [Line Items]
Property, equipment and capitalized software, gross	254,163	212,504
Software under development
Property, Plant and Equipment [Line Items]
Property, equipment and capitalized software, gross	49,922	39,694
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, equipment and capitalized software, gross	21,257	14,492
Capital leases
Property, Plant and Equipment [Line Items]
Property, equipment and capitalized software, gross	$ 759	$ 757

Property, Equipment and Capit79

Property, Equipment and Capitalized Software, Net - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Depreciation	$ 43,821	$ 35,285	$ 29,758
Impairment charges	$ 0	$ 0	$ 0

Goodwill and Other Intangible80

Goodwill and Other Intangible Assets - Changes In Goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Roll Forward]
Gross goodwill, beginning of period	$ 1,124,225	$ 1,129,962
Acquisition	728,890	38,767
Acquisition adjustments	502
Impact of foreign currency translation	(3,986)	(31,971)
Sale of subsidiaries		(12,533)
Gross goodwill, end of period	1,849,631	1,124,225
Accumulated impairment, beginning of period	(11,347)	(12,681)
Impact of foreign currency translation	157	1,334
Accumulated impairment, end of period	(11,190)	(11,347)
Net goodwill	1,838,441	1,112,878	$ 1,117,281
Fleet solutions
Goodwill [Roll Forward]
Gross goodwill, beginning of period	735,770	759,617
Acquisition	561,119	0
Acquisition adjustments	0
Impact of foreign currency translation	(3,751)	(23,700)
Sale of subsidiaries		(147)
Gross goodwill, end of period	1,293,138	735,770
Accumulated impairment, beginning of period	(867)	(969)
Impact of foreign currency translation	12	102
Accumulated impairment, end of period	(855)	(867)
Net goodwill	1,292,283	734,903	758,648
Travel and Corporate Solutions
Goodwill [Roll Forward]
Gross goodwill, beginning of period	38,134	40,251
Acquisition	167,771	0
Acquisition adjustments	0
Impact of foreign currency translation	(3,134)	(2,117)
Sale of subsidiaries		0
Gross goodwill, end of period	202,771	38,134
Accumulated impairment, beginning of period	(10,480)	(11,712)
Impact of foreign currency translation	145	1,232
Accumulated impairment, end of period	(10,335)	(10,480)
Net goodwill	192,436	27,654	28,539
Health and Employee Benefit Solutions
Goodwill [Roll Forward]
Gross goodwill, beginning of period	350,321	330,094
Acquisition	0	38,767
Acquisition adjustments	502
Impact of foreign currency translation	2,899	(6,154)
Sale of subsidiaries		(12,386)
Gross goodwill, end of period	353,722	350,321
Accumulated impairment, beginning of period	0	0
Impact of foreign currency translation	0	0
Accumulated impairment, end of period	0	0
Net goodwill	$ 353,722	$ 350,321	$ 330,094

Goodwill and Other Intangible81

Goodwill and Other Intangible Assets - Additional Information (Details) $ in Millions	3 Months Ended
	Jun. 30, 2016USD ($)
Software and Software Development Costs | Electronic Funds Source LLC
Finite-Lived Intangible Assets [Line Items]
Accelerated amortization of intangible assets	$ 10.1

Goodwill and Other Intangible82

Goodwill and Other Intangible Assets - Changes in Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2016	Dec. 31, 2015
Definite-lived intangible assets
Net Carrying Amount, Beginning of Year		$ 453,336
Acquisitions			$ 0
Amortization		(97,829)	(47,792)
Net Carrying Amount, End of Year		1,259,150	453,336
Indefinite-lived intangible assets
Net Carrying Amount, Beginning of Year		470,712	497,297
Acquisitions		892,520	39,500
Transfers		0	(3,216)
Impacts of Foreign Currency Translation		65	(15,077)
Net Carrying Amount, End of Year		1,265,468	470,712
Trademarks, trade names and brand names
Definite-lived intangible assets
Amortization		0	0
Indefinite-lived intangible assets
Net Carrying Amount, Beginning of Year		17,376	16,379
Acquisitions		0	0
Transfers		(11,000)	0
Impacts of Foreign Currency Translation		(58)	997
Net Carrying Amount, End of Year		6,318	17,376
Acquired software and developed technology
Definite-lived intangible assets
Net Carrying Amount, Beginning of Year		114,012	119,509
Acquisitions		32,120	10,300
Amortization		(32,109)	(9,844)
Transfers		0	0
Impacts of Foreign Currency Translation		3,993	(5,953)
Net Carrying Amount, End of Year		118,016	114,012
Customer relationships
Definite-lived intangible assets
Net Carrying Amount, Beginning of Year		297,904	309,450
Acquisitions		842,700	27,700
Amortization		(57,413)	(32,468)
Transfers		0	(2,329)
Impacts of Foreign Currency Translation		(2,868)	(4,449)
Net Carrying Amount, End of Year		1,080,323	297,904
Licensing agreements
Definite-lived intangible assets
Net Carrying Amount, Beginning of Year		27,398	35,341
Acquisitions		0	0
Amortization		(5,070)	(4,165)
Transfers		0	(164)
Impacts of Foreign Currency Translation		(694)	(3,614)
Net Carrying Amount, End of Year		21,634	27,398
Non-compete agreement
Definite-lived intangible assets
Net Carrying Amount, Beginning of Year		0
Acquisitions		4,000
Amortization		0
Transfers		0
Impacts of Foreign Currency Translation		0
Net Carrying Amount, End of Year		4,000	0
Patent
Definite-lived intangible assets
Net Carrying Amount, Beginning of Year		878	1,245
Acquisitions		0
Amortization		(228)	(243)
Transfers		0	0
Impacts of Foreign Currency Translation		6	(124)
Net Carrying Amount, End of Year		656	878
Trade name
Definite-lived intangible assets
Net Carrying Amount, Beginning of Year		13,144	15,373
Acquisitions		13,700	1,500
Amortization		(3,009)	(1,072)
Transfers		11,000	(723)
Impacts of Foreign Currency Translation		(314)	(1,934)
Net Carrying Amount, End of Year		$ 34,521	$ 13,144
Indefinite-lived intangible assets
Intangible assets remaining estimated useful life	7 years

Goodwill and Other Intangible83

Goodwill and Other Intangible Assets - Other Intangible Assets (Details) $ in Thousands	Dec. 31, 2016USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]
2,017	$ 148,774
2,018	130,586
2,019	120,814
2,020	110,269
2,021	$ 98,260

Goodwill and Other Intangible84

Goodwill and Other Intangible Assets - Summary of Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,513,292	$ 609,290
Accumulated Amortization	(254,142)	(155,954)
Net Carrying Amount	1,259,150	453,336
Net Carrying Amount, Total	1,265,468	470,712	$ 497,297
Acquired software and developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	187,499	155,182
Accumulated Amortization	(69,483)	(41,170)
Net Carrying Amount	118,016	114,012	119,509
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,247,624	403,382
Accumulated Amortization	(167,301)	(105,478)
Net Carrying Amount	1,080,323	297,904	309,450
Licensing agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	30,760	31,903
Accumulated Amortization	(9,126)	(4,505)
Net Carrying Amount	21,634	27,398	35,341
Non-compete agreement
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,000	0
Accumulated Amortization	0	0
Net Carrying Amount	4,000	0
Patent
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,380	2,413
Accumulated Amortization	(1,724)	(1,535)
Net Carrying Amount	656	878	1,245
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	41,029	16,410
Accumulated Amortization	(6,508)	(3,266)
Net Carrying Amount	34,521	13,144	$ 15,373
Trademarks, trade names and brand names
Finite-Lived Intangible Assets [Line Items]
Trademarks, trade names and brand names, Net Carrying Amount	$ 6,318	$ 17,376

Accounts Payable (Details)

Accounts Payable (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Merchant payables	$ 520,058	$ 313,244
Other payables	97,060	65,567
Accounts payable	$ 617,118	$ 378,811

Deposits, Borrowed Federal Fu86

Deposits, Borrowed Federal Funds and Other Debt - Schedule of Deposits (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
Certificates of deposit with maturities within 1 year	$ 517,524,000	$ 97,859,000
Certificates of deposit with maturities greater than 1 year and less than 5 years	208,048,000	54,448,000
Interest-bearing money market deposits	325,464,000	369,191,000
Negotiable order of withdrawal deposits	0	308,998,000
Customer deposits	67,787,000	40,022,000
Total deposits	$ 1,118,823,000	$ 870,518,000
Weighted average cost of funds on certificates of deposit outstanding	0.96%	0.90%
Weighted average cost of interest-bearing money market deposits	0.76%	0.45%

Deposits, Borrowed Federal Fu87

Deposits, Borrowed Federal Funds and Other Debt - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Aug. 31, 2016	Jul. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Certificates of deposit, denominations ($250 or less)	$ 250,000
Federal funds lines-of-credit	250,000,000				$ 257,500,000
Debt outstanding	0				0
Non-interest bearing deposits outstanding	$ 0				$ 308,998,000
Participation Agreement
Debt Instrument [Line Items]
Federal funds lines-of-credit		$ 50,000,000	$ 45,000,000	$ 10,000,000
Participation agreement	2.94%				2.57%	2.46%
Debt instrument, aggregate principal amount	$ 95,000,000				$ 45,000,000
Participation Agreement | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Variable interest rate margin	2.25%
WEX Brazil
Debt Instrument [Line Items]
Debt outstanding	$ 30,755,000				$ 5,046,000
Interest-bearing Deposits
Debt Instrument [Line Items]
Interest-bearing money market deposits, denominations	$ 250,000
Minimum
Debt Instrument [Line Items]
Certificates of deposit, maturities range	1 month
Certificates of deposit, fixed interest rates range	0.65%
Minimum | Participation Agreement
Debt Instrument [Line Items]
Long-term debt, range of daily balance	$ 0
Maximum
Debt Instrument [Line Items]
Certificates of deposit, maturities range	3 years
Certificates of deposit, fixed interest rates range	1.35%
Maximum | Participation Agreement
Debt Instrument [Line Items]
Long-term debt, range of daily balance	$ 95,000,000

Deposits, Borrowed Federal Fu88

Deposits, Borrowed Federal Funds and Other Debt - Average Interest Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Deposits	0.94%	0.65%	0.53%
Borrowed federal funds	0.69%	0.39%	0.38%
Interest-bearing money market deposits	0.50%	0.25%	0.23%
Average deposits and borrowed federal funds balance	$ 1,102,210	$ 1,026,963	$ 1,220,979
Average other debt (WEX Brazil and participation agreements)	$ 92,684	$ 51,209	$ 37,876
Participation Agreement
Debt Instrument [Line Items]
Participation agreement	2.94%	2.57%	2.46%
WEX Brazil
Debt Instrument [Line Items]
WEX Brazil debt	19.70%	15.21%	17.15%

Derivative Instruments - Additi

Derivative Instruments - Additional Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016USD ($)	Nov. 30, 2016agreement	Mar. 31, 2016
Interest rate swaps
Derivative [Line Items]
Interest rate swap agreements | agreement		3
Borrowings under derivative agreements | $	$ 800
Interest rate swaps | London Interbank Offered Rate (LIBOR) | Minimum
Derivative [Line Items]
Fixed rate variable interest		0.896%
Interest rate swaps | London Interbank Offered Rate (LIBOR) | Maximum
Derivative [Line Items]
Fixed rate variable interest		1.125%
Foreign Currency Swap
Derivative [Line Items]
Derivative settlement term	5 days
Price Risk Derivative
Derivative [Line Items]
Percentage hedged by fuel price derivatives			20.00%

Derivative Instruments - Schedu

Derivative Instruments - Schedule of Notional Amounts (Details) - Derivatives not designated as hedging instruments $ in Thousands	Nov. 30, 2016USD ($)
Tranche A
Derivative [Line Items]
Notional amount	$ 400,000
Amortization	5.00%
Fixed interest rate	1.108%
Tranche B
Derivative [Line Items]
Notional amount	$ 150,000
Fixed interest rate	1.125%
Tranche C
Derivative [Line Items]
Notional amount	$ 250,000
Fixed interest rate	0.896%

Derivative Instruments - Forwar

Derivative Instruments - Forward Currency Swap (Details) € in Thousands, £ in Thousands, AUD in Thousands	Dec. 31, 2016EUR (€)	Dec. 31, 2016GBP (£)	Dec. 31, 2016AUD	Dec. 31, 2015EUR (€)	Dec. 31, 2015GBP (£)	Dec. 31, 2015AUD
Foreign Currency Swap | Derivatives not designated as hedging instruments
Derivative [Line Items]
Notional amount	€ 0	£ 0	AUD 15,000	€ 10,000	£ 5,000	AUD 10,000

Derivative Instruments - Fair V

Derivative Instruments - Fair Value Of Fuel Price Derivative Instruments In Consolidated Balance Sheet (Details) gal in Thousands, $ in Thousands	9 Months Ended				12 Months Ended	18 Months Ended
	Mar. 31, 2016USD ($)$ / galgal	Dec. 31, 2015USD ($)$ / galgal	Jun. 30, 2015USD ($)$ / galgal	Mar. 31, 2015USD ($)$ / galgal	Dec. 31, 2015USD ($)$ / galgal	Dec. 31, 2015USD ($)$ / galgal	Sep. 30, 2015USD ($)$ / gal
Fuel
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount (gallons) | gal					3,969
Fair Value | $		$ 5,007			$ 5,007	$ 5,007
Put Strike - Unleaded Fuel
Derivatives, Fair Value [Line Items]
Price of Underlying Option (per gallon)	2.483	2.620	2.568	2.510	2.620	2.620	2.625
Call Strike - Unleaded Fuel
Derivatives, Fair Value [Line Items]
Price of Underlying Option (per gallon)	2.543	2.680	2.628	2.570	2.680	2.680	2.685
Unleaded Fuel
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount (gallons) | gal	2,655	0	0	0		0
Fair Value | $	$ 3,082	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Put Strike - Diesel
Derivatives, Fair Value [Line Items]
Price of Underlying Option (per gallon)	3.724	3.785	3.785	3.788	3.785	3.785	3.795
Call Strike - Diesel
Derivatives, Fair Value [Line Items]
Price of Underlying Option (per gallon)	3.784	3.845	3.845	3.848	3.845	3.845	3.855
Diesel Fuel
Derivatives, Fair Value [Line Items]
Aggregate Notional Amount (gallons) | gal	1,314	0	0	0		0
Fair Value | $	$ 1,925	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0

Derivative Instruments - Summar

Derivative Instruments - Summary of Changes in Fair Value (Details) - Fuel - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Derivative [Line Items]
Realized gains (losses)	$ 5,718	$ 41,810	$ (2,115)
Change in unrealized fuel price derivatives	(5,007)	(35,962)	48,327
Net realized and unrealized gains (losses) on derivative instruments	$ 711	$ 5,848	$ 46,212

Derivative Instruments - Locati

Derivative Instruments - Location and Amounts of Derivative Fair Values in Condensed Consolidated Balance Sheets (Details) - Derivatives not designated as hedging instruments - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other assets | Interest rate swaps
Derivative [Line Items]
Asset Derivatives, Fair Value	$ 12,908	$ 0
Other liabilities | Interest rate swaps
Derivative [Line Items]
Liability Derivatives, Fair Value	0	0
Fuel price derivatives, at fair value | Commodity contracts
Derivative [Line Items]
Asset Derivatives, Fair Value	0	5,007
Liability Derivatives, Fair Value	0	0
Accounts receivable | Foreign currency contracts
Derivative [Line Items]
Asset Derivatives, Fair Value	29	0
Accounts payable | Foreign currency contracts
Derivative [Line Items]
Liability Derivatives, Fair Value	$ 0	$ 90

Derivative Instruments - Loca95

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	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Foreign currency contracts | Foreign Currency Gain (Loss)
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in Income on Derivative	$ 59	$ 27,236	$ 15,398
Interest rate swaps | Net unrealized gains on interest rate swap agreements
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in Income on Derivative	12,908	0	0
Commodity contracts | Net realized and unrealized gains on fuel price derivatives
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain Recognized in Income on Derivative	$ 711	$ 5,848	$ 46,212

Financing Debt - Additional Inf

Financing Debt - Additional Information (Details)

Jul. 01, 2016USD ($)

Apr. 07, 2016

Apr. 28, 2015

Jan. 30, 2013USD ($)

Jan. 18, 2013USD ($)

Apr. 30, 2016

Sep. 30, 2016USD ($)

Jun. 30, 2016USD ($)

Dec. 31, 2016USD ($)

Dec. 31, 2015USD ($)

Dec. 31, 2014USD ($)

Nov. 30, 2016agreement

Jan. 31, 2016USD ($)

Jan. 17, 2013USD ($)

Debt Instrument [Line Items]

Current borrowing capacity

$ 2,125,000,000

$ 237,698,000

Maximum borrowing capacity

250,000,000

$ 257,500,000

Revolving line-of-credit facilities and term loans, net

1,599,291,000

664,918,000

Notes outstanding, net

395,534,000

394,800,000

Percentage of principal amount Company must offer to repurchase

101.00%

Term for extended securitization agreement

1 year

Securitized debt

84,323,000

82,018,000

Ticking fees expensed

30,045,000

0

$ 0

Loss on debt extinguishment

2,017,000

0

$ 0

Pledged receivables held as collateral

313,670,000

Electronic Funds Source LLC

Debt Instrument [Line Items]

Revolving line-of-credit facilities and term loans, net

$ 2,125,000,000

Commitment fee amount

(7,874,000)

Electronic Funds Source LLC | Interest Expense

Debt Instrument [Line Items]

Commitment fee amount

$ 22,171,000

30,045,000

Interest rate swaps

Debt Instrument [Line Items]

Interest rate swap agreements | agreement

3

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%

Senior Notes Redeemed During 12 Months Beginning February 1, 2018

Debt Instrument [Line Items]

Redemption price as percentage of principal amount

102.375%

Senior Notes Redeemed During 12 Months Beginning February 1, 2019

Debt Instrument [Line Items]

Redemption price as percentage of principal amount

101.583%

Senior Notes Redeemed During 12 Months Beginning February 1, 2020

Debt Instrument [Line Items]

Redemption price as percentage of principal amount

100.792%

Senior Notes Redeemed During 12 Months Beginning February 1, 2021

Debt Instrument [Line Items]

Redemption price as percentage of principal amount

100.00%

Senior Notes Redeemed Prior To February 1, 2018

Debt Instrument [Line Items]

Redemption price as percentage of principal amount

100.00%

2013 Credit Agreement

Debt Instrument [Line Items]

Credit agreement loan, term

5 years

Proceeds from Lines of Credit

$ 100,000,000

Federal Reserve Bank

Debt Instrument [Line Items]

Revolving line-of-credit facilities and term loans, net

0

Revolving Credit Facility

Debt Instrument [Line Items]

Deferred finance costs, net

38,334,000

4,837,000

Revolving Credit Facility | 2013 Credit Agreement

Debt Instrument [Line Items]

Maximum borrowing capacity

$ 800,000,000

$ 700,000,000

Credit agreement loan, term

5 years

Revolving Credit Facility | Letter of Credit

Debt Instrument [Line Items]

Current borrowing capacity

$ 250,000,000

Revolving Credit Facility | Letter of Credit | 2011 Credit Agreement

Debt Instrument [Line Items]

Revolving line-of-credit facilities and term loans, net

$ 13,346,000

8,550,000

Revolving Credit Facility | Letter of Credit | 2013 Credit Agreement

Debt Instrument [Line Items]

Maximum borrowing capacity

$ 150,000,000

Revolving Credit Facility | Swingline Loan

Debt Instrument [Line Items]

Current borrowing capacity

$ 20,000,000

Term Loans Facility | 2013 Credit Agreement

Debt Instrument [Line Items]

Maximum borrowing capacity

300,000,000

$ 185,000,000

Senior Subordinated Notes | 2013 Credit Agreement

Debt Instrument [Line Items]

Debt instrument, aggregate principal amount

300,000,000

2016 Credit Agreement Tranche A

Debt Instrument [Line Items]

Debt instrument, quarterly payment, percent of original principal amount

1.25%

Interest coverage ratio (no less than)

3.25

Indebtedness to EBITDA Ratio (no more than)

5.40

2016 Credit Agreement Tranche A | December 31, 2016

Debt Instrument [Line Items]

Indebtedness to EBITDA Ratio (no more than)

5.25

2016 Credit Agreement Tranche A | December 31, 2017

Debt Instrument [Line Items]

Indebtedness to EBITDA Ratio (no more than)

5

2016 Credit Agreement Tranche A | December 31, 2018

Debt Instrument [Line Items]

Indebtedness to EBITDA Ratio (no more than)

4.25

2016 Credit Agreement Tranche A | December 31, 2019

Debt Instrument [Line Items]

Indebtedness to EBITDA Ratio (no more than)

4

2016 Credit Agreement Tranche A | Interest Rate Option One | Eurocurrency Rate

Debt Instrument [Line Items]

Debt instrument, interest rate, floor

0.00%

2016 Credit Agreement Tranche A | Interest Rate Option One | Eurocurrency Rate | Minimum

Debt Instrument [Line Items]

Margin on variable rate, percent

1.75%

2016 Credit Agreement Tranche A | Interest Rate Option One | Eurocurrency Rate | Maximum

Debt Instrument [Line Items]

Margin on variable rate, percent

3.25%

3.25%

2016 Credit Agreement Tranche A | Interest Rate Option Two | Eurocurrency Rate | Minimum

Debt Instrument [Line Items]

Margin on variable rate, percent

0.75%

2016 Credit Agreement Tranche A | Interest Rate Option Two | Eurocurrency Rate | Maximum

Debt Instrument [Line Items]

Margin on variable rate, percent

2.25%

2016 Credit Agreement Tranche A | Term Loans Facility

Debt Instrument [Line Items]

Current borrowing capacity

$ 455,000,000

2016 Credit Agreement Tranche B

Debt Instrument [Line Items]

Participation agreement

4.20%

Debt instrument unamortized discount, percent

1.00%

Debt instrument, excess of cash required to be used for debt repayment

50.00%

Debt instrument, loan prepayment premium, percent

1.00%

Debt instrument, quarterly payment, percent of original principal amount

0.25%

2016 Credit Agreement Tranche B | Leverage Ratio One

Debt Instrument [Line Items]

Debt instrument, excess of cash required to be used for debt repayment

25.00%

2016 Credit Agreement Tranche B | Leverage Ratio Two

Debt Instrument [Line Items]

Debt instrument, excess of cash required to be used for debt repayment

0.00%

2016 Credit Agreement Tranche B | Interest Rate Option One | Eurocurrency Rate

Debt Instrument [Line Items]

Debt instrument, interest rate, floor

0.75%

2016 Credit Agreement Tranche B | Interest Rate Option One | Eurocurrency Rate | Minimum

Debt Instrument [Line Items]

Interest rate, stated percentage

3.25%

2016 Credit Agreement Tranche B | Interest Rate Option One | Eurocurrency Rate | Maximum

Debt Instrument [Line Items]

Margin on variable rate, percent

3.50%

3.50%

2016 Credit Agreement Tranche B | Interest Rate Option Two | Eurocurrency Rate | Minimum

Debt Instrument [Line Items]

Interest rate, stated percentage

2.25%

2016 Credit Agreement Tranche B | Interest Rate Option Two | Eurocurrency Rate | Maximum

Debt Instrument [Line Items]

Margin on variable rate, percent

2.50%

2.50%

2016 Credit Agreement Tranche B | Term Loans Facility

Debt Instrument [Line Items]

Current borrowing capacity

$ 1,200,000,000

Revolving line-of-credit facilities and term loans, net

$ 1,599,291,000

2016 Credit Agreement

Debt Instrument [Line Items]

Current borrowing capacity

470,000,000

Maximum borrowing capacity

$ 375,000,000

Leverage ratio

4

Revolving line-of-credit facilities and term loans, net

$ 1,875,000,000

Debt instrument, cash proceeds from assets sales required to be used towards debt repayment, percent

100.00%

Debt instrument. cash proceeds from other debts required to be used towards debt repayment, percent

100.00%

Debt issuance costs

$ 49,810,000

$ 49,810,000

Debt issuance discount

12,000,000

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%

0.50%

2016 Credit Agreement | Revolving Credit Facility

Debt Instrument [Line Items]

Current borrowing capacity

$ 470,000,000

Proceeds from (Payments of) lines of credit

$ 220,000,000

Revolving line-of-credit facilities and term loans, net

$ 0

Loan origination fees

9,150,000

2014 Credit Agreement

Debt Instrument [Line Items]

Deferred finance costs, net

4,466,000

5,200,000

Ticking fees expensed

$ 5,056,000

Loss on debt extinguishment

$ 2,018,000

2014 Credit Agreement | Revolving Credit Facility

Debt Instrument [Line Items]

Maximum borrowing capacity

$ 700,000,000

Revolving line-of-credit facilities and term loans, net

$ 282,639,000

2014 Credit Agreement | Revolving Credit Facility | Eurocurrency Rate

Debt Instrument [Line Items]

Margin on variable rate, percent

2.00%

2014 Credit Agreement | Revolving Credit Facility | London Interbank Offered Rate (LIBOR)

Debt Instrument [Line Items]

Margin on variable rate, percent

2.00%

2014 Credit Agreement | Revolving Credit Facility | Prime Rate

Debt Instrument [Line Items]

Margin on variable rate, percent

1.00%

2014 Credit Agreement | Term Loans Facility

Debt Instrument [Line Items]

Revolving line-of-credit facilities and term loans, net

$ 445,000,000

458,750,000

2014 Credit Agreement | Term Loans Facility | London Interbank Offered Rate (LIBOR)

Debt Instrument [Line Items]

Margin on variable rate, percent

2.00%

Senior Notes

Debt Instrument [Line Items]

Interest rate, stated percentage

4.75%

4.75%

Notes outstanding, net

$ 400,000,000

$ 400,000,000

$ 400,000,000

Issue price of principal amount

100.00%

Debt instrument, aggregate principal amount

$ 400,000,000

Senior Notes | 2013 Credit Agreement

Debt Instrument [Line Items]

Notes outstanding, net

$ 400,000,000

Senior Notes | Revolving Credit Facility | 2013 Credit Agreement

Debt Instrument [Line Items]

Maximum borrowing capacity

$ 700,000,000

Securitization Facility

Debt Instrument [Line Items]

Term of securitization facility

1 year

Securitization facility, percentage of receivables used as collateral

85.00%

Interest rate during period, percent

2.65%

2.91%

Securitized debt

$ 78,592,000

$ 82,018,000

European Securitization Facility

Debt Instrument [Line Items]

Interest rate during period, percent

0.95%

Debt instrument, term

5 years

Securitized debt

$ 5,731,000

Financing Debt - Summary of Ann

Financing Debt - Summary of Annual Principal Payments (Details) $ in Thousands	Dec. 31, 2016USD ($)
Debt Disclosure [Abstract]
2,017	$ 34,750
2,018	34,750
2,019	34,750
2,020	34,750
2,021	$ 364,625

Financing Debt - Schedule of De

Financing Debt - Schedule of Debt Issuance Cost (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Notes outstanding
Line of Credit Facility [Line Items]
Deferred finance costs, net	$ 4,466	$ 5,200
Revolving line of credit facilities and term loans
Line of Credit Facility [Line Items]
Deferred finance costs, net	$ 38,334	$ 4,837

Income Taxes - Components Of In

Income Taxes - Components Of Income Before Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
United States	$ 32,622	$ 203,692	$ 329,633
Foreign	54,479	(18,784)	(27,994)
Income before income taxes	$ 87,101	$ 184,908	$ 301,639

Income Taxes - Components Of100

Income Taxes - Components Of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Current, United States	$ (1,232)	$ 22,570	$ 43,565
Deferred, United States	21,565	37,553	51,581
Current, State and Local	3,033	4,288	3,326
Deferred, State and Local	(5,106)	5,631	3,979
Current, Foreign	8,325	9,173	8,009
Deferred, Foreign	3,040	(3,919)	(8,839)
Current, Total	10,126	36,031	54,900
Deferred, Total	$ 19,499	$ 39,265	$ 46,721

Income Taxes - Reconciliation O

Income Taxes - Reconciliation Of Provision Of Income Taxes (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	35.00%	35.00%
State income taxes (net of federal income tax benefit)	1.10%	2.50%	1.60%
Foreign income tax rate differential	(4.40%)	1.40%	1.10%
Revaluation of deferred tax assets for tax rate changes and blending differences, net	(0.90%)	0.70%	(0.10%)
Research and development credit	(0.50%)	0.20%	(0.60%)
Release of tax reserves	(4.90%)	0.00%	0.00%
Withholding taxes	0.30%	0.00%	0.00%
Domestic production exclusions	(0.00%)	(1.80%)	(4.00%)
Change in valuation allowance	2.30%	1.60%	0.10%
Nondeductible expenses	3.40%	0.30%	0.00%
Other	2.60%	0.80%	0.60%
Effective tax rate	34.00%	40.70%	33.70%

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Contingency [Line Items]
Effective tax rate	34.00%	40.70%	33.70%
Tax expense related to valuation allowance	$ 2,000,000	$ 2,888,000
Undistributed earnings of certain foreign subsidiaries	25,824,000	13,230,000
Unrecognized tax benefits, net	4,960,000	4,776,000	$ 4,856,000	$ 5,283,000
Unrecognized tax benefits that, if recognized, would impact effective tax rate	4,960,000
Accrued penalties and interest related to uncertain tax positions	0	2,251,000	$ 1,988,000
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Operating loss carry forwards	211,010,000	102,483,000
Domestic Tax Authority
Income Tax Contingency [Line Items]
Operating loss carry forwards	103,739,000	10,072,000
Foreign Tax Authority
Income Tax Contingency [Line Items]
Operating loss carry forwards	$ 54,062,000	$ 69,762,000

Income Taxes - Deferred Tax Ass

Income Taxes - Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred assets related to:
Reserve for credit losses	$ 7,122	$ 5,310
Tax credit carryforwards	5,178	4,686
Stock-based compensation, net	12,729	9,150
Net operating loss carryforwards	56,501	22,797
Pension	944	0
Accruals	23,461	5,992
Unrealized losses	164	2,647
Total	106,099	50,582
Deferred tax liabilities related to:
Unrealized gains	0	1,876
Other liabilities	643	1,226
Property, equipment and capitalized software	32,759	20,861
Intangibles, net	118,695	94,814
Investment in partnership	94,354	0
Pension	0	600
Total	246,451	119,377
Valuation allowance primarily on net operating loss carryforwards	5,620	4,814
Deferred income taxes, net	$ (145,972)	$ (73,609)

Income Taxes - Net Deferred Tax

Income Taxes - Net Deferred Tax Assets By Jurisdiction (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Tax Contingency [Line Items]
Deferred Tax Liabilities, Net	$ (145,972)	$ (73,609)
United States
Income Tax Contingency [Line Items]
Deferred Tax Liabilities, Net	(148,389)	(76,308)
Australia
Income Tax Contingency [Line Items]
Deferred Tax Liabilities, Net	(2,020)	(6,153)
New Zealand
Income Tax Contingency [Line Items]
Deferred Tax Assets, Net, Total	183	252
The Netherlands
Income Tax Contingency [Line Items]
Deferred Tax Assets, Net, Total	206	230
United Kingdom
Income Tax Contingency [Line Items]
Deferred Tax Assets, Net, Total	6,474	9,623
Brazil
Income Tax Contingency [Line Items]
Deferred Tax Liabilities, Net	(2,497)	(1,253)
Canada
Income Tax Contingency [Line Items]
Deferred Tax Assets, Net, Total	$ 71	$ 0

Income Taxes - Reconciliatio105

Income Taxes - Reconciliation Of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 4,776	$ 4,856	$ 5,283
Increases related to prior year tax positions	4,960	431	0
Decreases related to prior year tax positions, due to foreign currency exchange	0	(511)	(427)
Decreases related to prior year tax positions	(431)	0	0
Lapse of statute	(4,345)	0	0
Ending balance	$ 4,960	$ 4,776	$ 4,856

Tax Receivable Agreement - Addi

Tax Receivable Agreement - Additional Information (Details) - USD ($) $ in Thousands	Jun. 26, 2009	Jul. 27, 2006	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2005
Income Tax Holiday [Line Items]
Percentage of remittance of cash savings						85.00%
Pursuant of tax receivable prepayment to third party	$ 51,000
Charge to non-operating expense			$ 563	$ (2,145)	$ 1,331
Payments for tax receivable agreement			$ 10,797
Realogy Corporation
Income Tax Holiday [Line Items]
Acquired right to receive percentage of payment		62.50%
Wyndham Worldwide Corporation
Income Tax Holiday [Line Items]
Acquired right to receive percentage of payment		37.50%
Percentage of right to receive payments under ratification agreement	31.875%

Employee Benefit Plans - Addit

Employee Benefit Plans - Additional Information (Details) - USD ($) $ in Thousands	Feb. 01, 2017	Jan. 02, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Eligible age to participate			18 years
Hours worked to be eligible to participate (at least)			1000 hours
Eligible year of service for Company matching contributions			1 year
Company matching percentage of each employee's contributions to maximum employee eligible compensation			100.00%
Maximum percentage of employee eligible compensation to the plan			6.00%
Contributions by company			$ 5,297	$ 4,571	$ 3,502
Obligation related to defined contribution plan			5,673	5,655
Aggregate market value of the securities			5,673	5,655
Expense under defined benefit pension plans				0
Evolution1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets received from acquisition		$ 21,739
ESSO Portfolio | Foreign Postretirement Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Obligation related to defined contribution plan			5,979	$ 4,406
Expense under defined benefit pension plans			$ 0
Subsequent Event | Evolution1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets received from acquisition	$ 15,159

Fair Value - Assets and Liabili

Fair Value - Assets and Liabilities Measured at Fair Value and Related Hierarchy Levels (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Assets:
Available-for-sale securities	$ 23,525	$ 18,562
Derivative asset	0	5,007
Significant Other Observable Inputs (Level 2)
Liabilities:
Foreign currency swaps	0	90
Significant Other Observable Inputs (Level 2) | Fuel price derivatives - unleaded fuel
Assets:
Derivative asset	0	3,083
Significant Other Observable Inputs (Level 2) | Interest rate swaps
Assets:
Derivative asset	12,908	0
Significant Other Observable Inputs (Level 2) | Foreign Currency Swap
Assets:
Derivative asset	29	0
Significant Other Observable Inputs (Level 2) | Mortgage-backed securities
Assets:
Available-for-sale securities	490	650
Significant Other Observable Inputs (Level 2) | Asset-backed securities
Assets:
Available-for-sale securities	648	848
Significant Other Observable Inputs (Level 2) | Municipal bonds
Assets:
Available-for-sale securities	682	398
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Executive deferred compensation plan trust	5,673	5,655
Quoted Prices in Active Markets for Identical Assets (Level 1) | Equity securities
Assets:
Available-for-sale securities	21,705	16,666
Significant Unobservable Inputs (Level 3) | Fuel price derivatives - diesel
Assets:
Derivative asset	$ 0	$ 1,924

Fair Value - Additional Informa

Fair Value - Additional Information (Details) - USD ($)	Dec. 31, 2016	Dec. 31, 2015	Jan. 30, 2013
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Notes outstanding, net	$ 395,534,000	$ 394,800,000
Fair value of notes	390,000,000	366,000,000
Senior Notes
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Notes outstanding, net	$ 400,000,000	$ 400,000,000	$ 400,000,000

Fair Value - Quantitative Infor

Fair Value - Quantitative Information About Level Three Fair Value Measurements (Details) - Fuel price derivatives - diesel $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)$ / gal
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair value | $	$ 1,924
Option Model | Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Future retail price of diesel (in dollars per gallon)	3.72
Option Model | Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Future retail price of diesel (in dollars per gallon)	3.78

Fair Value - Reconciliation of

Fair Value - Reconciliation of Beginning and Ending Balances for Assets (Liabilities) Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Level Three) (Details) - Fuel price derivatives - diesel - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Fuel Price Derivatives – Diesel
Beginning balance	$ 1,924	$ 11,848
Total gains or (losses) – realized/unrealized
Included in earnings	(1,924)	(9,924)
Ending balance	$ 0	$ 1,924

Non-controlling Interest - Addi

Non-controlling Interest - Additional Information (Details) - USD ($) $ in Thousands	Aug. 31, 2015	Dec. 31, 2015	Dec. 31, 2013	Aug. 30, 2012
Redeemable Noncontrolling Interest [Line Items]
Purchase of redeemable non-controlling interest		$ 46,018
Unik Financial Services
Redeemable Noncontrolling Interest [Line Items]
Percent of ownership interest acquired	49.00%			51.00%
Purchase of redeemable non-controlling interest	$ 46,018
WEX Europe Services
Redeemable Noncontrolling Interest [Line Items]
Percent of ownership interest acquired			75.00%

Non-controlling Interest - Rede

Non-controlling Interest - Redeemable Noncontrolling Interests (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2015USD ($)
Reconciliation of Redeemable Noncontrolling Interest [Roll Forward]
Beginning balance	$ 16,590
Net income attributable to redeemable non-controlling interest	1,190
Currency translation adjustment	(4,210)
Accretion to redemption value	9,413
Excess purchase amount over redemption value	23,035
Purchase of non-controlling interest	(46,018)
Ending balance	$ 0

Non-controlling Interest - Reco

Non-controlling Interest - Reconciliation of Noncontrolling Interests (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	$ 12,437
Net loss attributable to non-controlling interest	(3,161)	$ (1,705)	$ (2,193)
Ending balance	8,558	12,437
WEX Europe Services
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Beginning balance	12,437	17,396
Net loss attributable to non-controlling interest	(3,161)	(2,896)
Currency translation adjustment	(718)	(2,063)
Ending balance	$ 8,558	$ 12,437	$ 17,396

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loss Contingencies [Line Items]
Unused commitments to extend credit	$ 5,421,000	$ 6,229,000
Minimum volume purchase commitments	1,301,675
Office space, equipment, and vehicle
Loss Contingencies [Line Items]
Rent expense	15,104	11,310	$ 8,838
Technology Hardware and Software
Loss Contingencies [Line Items]
Rent expense	$ 12,875	$ 11,288	$ 9,852

Commitments and Contingencie116

Commitments and Contingencies - Future Minimum Lease Payments Under Non-Cancelable Operating and Capital Leases (Detail) $ in Thousands	Dec. 31, 2016USD ($)
Operating
2,017	$ 11,495
2,018	9,276
2,019	6,429
2,020	5,354
2,021	4,593
Thereafter	14,924
Total minimum lease payments	$ 52,071

Accumulated Other Comprehens117

Accumulated Other Comprehensive Loss - Reconciliation of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	$ 1,505,747	$ 1,095,681	$ 1,077,721	$ 903,297
Purchase of redeemable non-controlling interest		46,018
Ending balance	1,505,747	1,095,681
Unrealized Losses on Available- for-Sale Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(463)	(212)	(129)
Other comprehensive loss	(251)	(83)
Purchase of redeemable non-controlling interest	0	0
Ending balance	(463)	(212)
Foreign Currency Items
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning balance	(122,376)	(103,239)	$ (50,452)
Other comprehensive loss	(19,137)	(43,679)
Purchase of redeemable non-controlling interest	0	(9,108)
Ending balance	$ (122,376)	$ (103,239)

Accumulated Other Comprehens118

Accumulated Other Comprehensive Loss - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification amounts from accumulated other comprehensive loss	$ 0	$ 0
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income (loss), tax	$ 5,416	$ 2,647

Dividend Restrictions - Additio

Dividend Restrictions - Additional Information (Details)	12 Months Ended
	Dec. 31, 2016USD ($)
Debt Instrument [Line Items]
Ratio of funded indebtedness to EBITDA (no more than)	2.50
Maximum restricted payments, including dividends, per annum	$ 50,000,000
Percentage of eligible carry over of unused restricted dividend payments	100.00%
Percentage of transfer to surplus fund	10.00%
Required percentage of surplus to capital stock	100.00%
Capital stock	$ 5,250,000
Capital surplus as percent of capital stock	100.00%
December 31, 2016
Debt Instrument [Line Items]
Ratio of funded indebtedness to EBITDA (no more than)	5.25
December 31, 2017
Debt Instrument [Line Items]
Ratio of funded indebtedness to EBITDA (no more than)	5
December 31, 2018
Debt Instrument [Line Items]
Ratio of funded indebtedness to EBITDA (no more than)	4.25
December 31, 2019
Debt Instrument [Line Items]
Ratio of funded indebtedness to EBITDA (no more than)	4

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Details)	1 Months Ended	12 Months Ended
	May 31, 2015shares	Dec. 31, 2016USD ($)planshares	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)shares	May 31, 2010shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized (in shares) | shares					3,800,000
Share-based compensation arrangement by share-based payment award, number of additional shares authorized (in shares) | shares	1,596,000
Number of stock-based compensation plans | plan		4
Total stock-based compensation cost recognized		$ 19,742,000	$ 12,420,000	$ 13,790,000
Tax benefit from stock option and restricted stock units		7,200,000	4,542,000	4,983,000
Total unrecognized compensation cost		0
Shares exercised, total intrinsic value		$ 1,712,000	216,000	1,543,000
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Total unrecognized compensation cost		$ 9,037,000
Compensation cost expected recognition weighted average period		1 year 3 months 18 days
Shares granted fair value		$ 18,826,000	7,846,000	7,376,000
Shares vested fair value		3,648,000	4,521,000	8,545,000
Deferred Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted and vested fair value		$ 238,000	363,000	189,000
Performance Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost expected recognition weighted average period		1 year 7 months 6 days
Shares vested fair value		$ 4,858,000	2,035,000	2,474,000
Performance Based Restricted Stock Units | Units at Threshold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost		5,107,000
Performance Based Restricted Stock Units | Units at Target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost		10,835,000
Shares granted fair value		15,921,000	6,860,000	$ 19,239,000
Performance Based Restricted Stock Units | Units at Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total unrecognized compensation cost		$ 21,450,000
Performance Based Restricted Stock Units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance goals tracking period		1 year
Performance Based Restricted Stock Units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance goals tracking period		3 years
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period		3 years
Total unrecognized compensation cost		$ 2,865,000
Compensation cost expected recognition weighted average period		1 year 4 months 24 days
Award vesting rights, percentage		33.00%
Expiration period		10 years
Grant date fair value of shares		$ 3,297,000	$ 1,855,000
Shares, Granted (in shares) | shares		126,000		0
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units of common stock available for grant | shares		2,645,987,000

Stock-Based Compensation - Summ

Stock-Based Compensation - Summary Of Restricted Stock Units (Details) - Restricted Stock Units (RSUs)	12 Months Ended
	Dec. 31, 2016$ / sharesshares
Units
Balance at beginning of period (in shares) | shares	99,000
Granted (in shares) | shares	209,000
Forfeited (in shares) | shares	(11,000)
Withheld for taxes (in shares) | shares	(28,000)
Balance at end of period (in shares) | shares	206,000
Weighted- Average per share Grant- Date Fair Value
Balance at beginning of period (in dollars per share) | $ / shares	$ 94.51
Granted (in dollars per share) | $ / shares	90.24
Forfeited (in dollars per share) | $ / shares	87.22
Withheld for taxes (in dollars per share) | $ / shares	96.40
Balance at end of period (in dollars per share) | $ / shares	$ 88.78
Restricted Stock Units Issued
Units
Vested (in shares) | shares	(61,000)
Weighted- Average per share Grant- Date Fair Value
Vested (in dollars per share) | $ / shares	$ 94.93
Restricted Stock Units Deferred
Units
Vested (in shares) | shares	(2,000)
Weighted- Average per share Grant- Date Fair Value
Vested (in dollars per share) | $ / shares	$ 87.08

Stock-Based Compensation - S122

Stock-Based Compensation - Summary Of Deferred Stock Units (Details) - Deferred Stock Units	12 Months Ended
	Dec. 31, 2016$ / sharesshares
Shares
Balance at beginning of period (in shares) | shares	98,000
Units, Awards (in shares) | shares	1,000
Units, Converted from RSUs (in shares) | shares	2,000
Balance at end of period (in shares) | shares	101,000
Weighted- Average per share Grant-Date Fair Value
Balance at beginning of period (in dollars per share) | $ / shares	$ 30.59
Weighted-Average Grant-Date Fair Value, Awards (in dollars per share) | $ / shares	84.52
Weighted-Average Grant-Date Fair Value, Converted from RSUs (in dollars per share) | $ / shares	87.08
Balance at end of period (in dollars per share) | $ / shares	$ 32.12

Stock-Based Compensation - S123

Stock-Based Compensation - Summary Of Performance Based Restricted Stock Units (Details) - Performance Based Restricted Stock Units	12 Months Ended
	Dec. 31, 2016$ / sharesshares
Weighted- Average per share Grant-Date Fair Value
Balance at beginning of period (in dollars per share) | $ / shares	$ 96.16
Granted (in dollars per share) | $ / shares	80.84
Forfeited / Canceled (in dollars per share) | $ / shares	85.46
Converted to RSUs (in dollars per share) | $ / shares	105.30
Balance at end of period (in dollars per share) | $ / shares	$ 84.83
Units at Threshold
Shares
Balance at beginning of period (in shares)	71,000
Granted (in shares)	95,000
Forfeited / Canceled (in shares)	(4,000)
Converted to RSUs (in shares)	(40,000)
Balance at end of period (in shares)	122,000
Units at Target
Shares
Balance at beginning of period (in shares)	188,000
Granted (in shares)	197,000
Forfeited / Canceled (in shares)	(10,000)
Converted to RSUs (in shares)	(65,000)
Balance at end of period (in shares)	310,000
Units at Maximum
Shares
Balance at beginning of period (in shares)	363,000
Granted (in shares)	389,000
Forfeited / Canceled (in shares)	(19,000)
Converted to RSUs (in shares)	(119,000)
Balance at end of period (in shares)	614,000

Stock-Based Compensation - S124

Stock-Based Compensation - Summary of Assumptions Used (Details) - Stock Option - $ / shares	Mar. 15, 2016	Aug. 31, 2015	Mar. 15, 2015	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average expected life (in years)	6 years	5 years 9 months 7 days	6 years
Weighted average exercise price (in dollars per share)	$ 77.20	$ 94.53	$ 103.75	$ 81.90	$ 71.50
Weighted average volatility	31.93%	28.73%	30.53%
Weighted average risk-free rate	1.62%	1.66%	1.73%
Weighted average fair value (in dollars per share)	$ 26.14	$ 28.90	$ 34.13

Stock-Based Compensation - S125

Stock-Based Compensation - Summary of Stock Option Plan (Details) - Stock Option - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2014
Shares
Shares, Beginning balance outstanding (in shares)	81,000
Shares, Granted (in shares)	126,000	0
Shares, Exercised (in shares)	(22,000)
Shares, Forfeited or expired (in shares)	(5,000)
Shares, Ending balance outstanding (in shares)	180,000
Shares, Exercisable (in shares)	23,000
Shares, Vested and expected to vest (in shares)	172,000
Weighted- Average per share Exercise Price
Weighted-Average Exercise Price, Beginning balance outstanding (in dollars per share)	$ 71.50
Weighted-Average Exercise Price, Granted (in dollars per share)	77.20
Weighted-Average Exercise Price, Exercised (in dollars per share)	13.96
Weighted-Average Exercise Price, Forfeited or expired (in dollars per share)	87.38
Weighted-Average Exercise Price, Ending balance outstanding (in dollars per share)	81.90
Exercisable (in dollars per share)	75.58
Vested and expected to vest (in dollars per share)	$ 82
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term	8 years 6 months 26 days
Exercisable	5 years 8 months 9 days
Vested and expected to vest	8 years 6 months 15 days
Outstanding	$ 5,347
Exercisable	833
Vested and expected to vest	$ 5,081

Restructuring - Additional Info

Restructuring - Additional Information (Details) $ in Thousands	Dec. 31, 2016USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges incurred to date	$ 17,340
2015 Restructuring Initiative
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost	300
2016 Restructuring Initiative
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost	300
Acquisition Integration Restructuring Initiative
Restructuring Cost and Reserve [Line Items]
Expected restructuring cost	$ 600

Restructuring - Summary of Rest

Restructuring - Summary of Restructuring Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Restructuring Reserve [Roll Forward]
Beginning balance	$ 7,249	$ 0
Restructuring charges	8,302	9,038
Reserve release	(816)	(28)
Cash paid	(4,775)	(1,433)
Impact of foreign currency translation	697	(328)
Ending balance	10,657	7,249
2015 Restructuring Initiative
Restructuring Reserve [Roll Forward]
Beginning balance	7,249	0
Restructuring charges	2,182	9,038
Reserve release	(816)	(28)
Cash paid	(3,921)	(1,433)
Other	(166)	0
Impact of foreign currency translation	703	(328)
Ending balance	5,231	7,249
2016 Restructuring Initiative
Restructuring Reserve [Roll Forward]
Beginning balance	0
Restructuring charges	3,506
Reserve release	0
Cash paid	(4)
Other	166
Impact of foreign currency translation	(6)
Ending balance	3,662	0
Acquisition Integration Restructuring Initiative
Restructuring Reserve [Roll Forward]
Beginning balance	0
Restructuring charges	2,614
Cash paid	(850)
Ending balance	$ 1,764	$ 0

Segment Information - Additiona

Segment Information - Additional Information (Details)	12 Months Ended
	Dec. 31, 2016USD ($)segment	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment	3
Goodwill impairment | $	$ 0	$ 0	$ 0

Segment Information - Interest

Segment Information - Interest Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total interest income	$ 17,132	$ 7,168	$ 6,666
Fleet solutions
Segment Reporting Information [Line Items]
Total interest income	3,053	1,704	1,853
Travel and Corporate Solutions
Segment Reporting Information [Line Items]
Total interest income	498	348	96
Health and Employee Benefit Solutions
Segment Reporting Information [Line Items]
Total interest income	$ 13,581	$ 5,116	$ 4,717

Segment Information - Reportabl

Segment Information - Reportable Segment Results (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting, Revenue Reconciling Item [Line Items]
Payment processing revenue									$ 520,619	$ 495,869	$ 519,987
Account servicing revenue									211,012	156,693	115,509
Finance fee revenue									138,940	88,993	80,883
Other revenue									147,889	113,082	101,268
Total revenues	$ 290,840	$ 287,756	$ 233,936	$ 205,928	$ 212,642	$ 226,057	$ 213,653	$ 202,285	1,018,460	854,637	817,647
Operating interest expense									12,386	5,628	6,437
Depreciation and amortization									141,651	83,077	70,380
Fleet solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Payment processing revenue									297,900	305,855	357,050
Account servicing revenue									127,106	100,850	81,217
Finance fee revenue									124,725	83,554	75,703
Other revenue									92,330	57,419	54,373
Total revenues									642,061	547,678	568,343
Operating interest expense									3,476	1,869	2,910
Depreciation and amortization									100,860	54,453	54,789
Adjusted pre-tax income before NCI									175,162	199,319	206,367
Travel and corporate solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Payment processing revenue									175,762	151,311	141,368
Account servicing revenue									1,247	1,930	1,647
Finance fee revenue									643	326	438
Other revenue									37,595	41,852	39,513
Total revenues									215,247	195,419	182,966
Operating interest expense									2,969	1,218	410
Depreciation and amortization									6,187	2,999	1,911
Adjusted pre-tax income before NCI									103,167	73,510	87,664
Health and Employee Benefit Solutions
Segment Reporting, Revenue Reconciling Item [Line Items]
Payment processing revenue									46,957	38,703	21,569
Account servicing revenue									82,660	53,912	32,645
Finance fee revenue									13,572	5,113	4,742
Other revenue									17,963	13,812	7,383
Total revenues									161,152	111,540	66,339
Operating interest expense									5,941	2,541	3,117
Depreciation and amortization									34,604	25,625	13,680
Adjusted pre-tax income before NCI									$ 19,762	$ 28,576	$ 11,307

Segment Information - Reconcili

Segment Information - Reconciliation of Adjusted Net Income to Net Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Income before income taxes	$ 87,101	$ 184,908	$ 301,639
Net foreign currency remeasurement loss	7,665	5,689	13,438
Stock-based compensation	19,742	12,420	13,790
Restructuring and other costs	8,302	9,038
Non-cash adjustments related to tax receivable agreement	563	(2,145)	1,331
Segment Reconciling Items
Segment Reporting Information [Line Items]
Unrealized (gains) losses on derivative instruments	(7,901)	35,962	(48,327)
Net foreign currency remeasurement loss	7,665	5,689	13,438
Acquisition and divestiture related items	148,753	50,714	20,826
Stock-based compensation	19,742	12,420	13,790
Restructuring and other costs	13,995	9,010	0
Vendor settlement	15,500	0	0
Debt restructuring and debt issuance cost amortization	12,673	3,097	2,641
Non-cash adjustments related to tax receivable agreement	563	(2,145)	1,331
Regulatory reserve	0	1,750	0
Adjusted pre-tax income before NCI	$ 298,091	$ 301,405	$ 305,338

Segment Information - Schedule

Segment Information - Schedule Of Revenue By Geographic Data (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues	$ 290,840	$ 287,756	$ 233,936	$ 205,928	$ 212,642	$ 226,057	$ 213,653	$ 202,285	$ 1,018,460	$ 854,637	$ 817,647
Property, equipment and capitalized software, net	167,278				138,585				167,278	138,585	105,596
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues									839,917	691,088	708,827
Property, equipment and capitalized software, net	146,165				79,265				146,165	79,265	72,334
Australia
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues									53,068	50,387	57,897
Property, equipment and capitalized software, net	5,493				5,445				5,493	5,445	6,280
Other international
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenues									125,475	113,162	50,923
Property, equipment and capitalized software, net	$ 15,620				$ 53,875				$ 15,620	$ 53,875	$ 26,982

Supplementary Regulatory Cap133

Supplementary Regulatory Capital Disclosure - Actual and Regulatory Minimum Capital Amounts and Ratios (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Banking and Thrift [Abstract]
Total Capital to risk-weighted assets, Actual Amount	$ 228,402	$ 202,294
Total Capital to risk-weighted assets, Ratio	12.59%	15.50%
Total Capital to risk-weighted assets, Minimum for Capital Adequacy Purposes Amount	$ 145,182	$ 104,437
Total Capital to risk-weighted assets, Ratio	8.00%	8.00%
Total Capital to risk-weighted assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 181,477	$ 130,547
Total Capital to risk-weighted assets, Ratio	10.00%	10.00%
Tier 1 Capital to average assets, Actual Amount	$ 214,847	$ 193,337
Tier 1 Capital to average assets, Ratio	11.10%	11.23%
Tier 1 Capital to average assets, Minimum for Capital Adequacy Purposes Amount	$ 77,413	$ 68,865
Tier 1 Capital to average assets, Ratio	4.00%	4.00%
Tier 1 Capital to average assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 96,767	$ 86,082
Tier 1 Capital to average assets, Ratio	5.00%	5.00%
Common equity to risk-weighted assets, Actual Amount	$ 214,847	$ 193,337
Common equity to risk-weighted assets, Ratio	11.84%	14.81%
Common equity to risk-weighted assets, Minimum for Capital Adequacy Purposes Amount	$ 81,665	$ 58,746
Common equity to risk-weighted assets, Ratio	4.50%	4.50%
Common equity to risk-weighted assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 117,961	$ 84,855
Common equity to risk-weighted assets, Ratio	6.50%	6.50%
Tier 1 Capital to risk-weighted assets, Actual Amount	$ 214,847	$ 193,337
Tier 1 Capital to risk-weighted assets, Ratio	11.84%	14.81%
Tier 1 Capital to risk-weighted assets, Minimum for Capital Adequacy Purposes Amount	$ 108,887	$ 78,328
Tier 1 Capital to risk-weighted assets, Ratio	6.00%	6.00%
Tier 1 Capital to risk-weighted assets, Minimum to Be Well Capitalized Under Prompt Corrective Action Provisions Amount	$ 145,183	$ 104,437
Tier 1 Capital to risk-weighted assets, Ratio	8.00%	8.00%

Quarterly Financial Results 134

Quarterly Financial Results (Unaudited) - Summary Of Quarterly Financial Results (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Jul. 01, 2016	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Total revenues		$ 290,840	$ 287,756	$ 233,936	$ 205,928	$ 212,642	$ 226,057	$ 213,653	$ 202,285	$ 1,018,460	$ 854,637	$ 817,647
Operating income		47,798	54,568	51,635	41,127	49,890	67,745	62,918	48,240	195,128	228,793	306,238
Net earnings attributable to shareholders		$ 5,288	$ 19,696	$ 12,567	$ 23,086	$ 20,901	$ 32,166	$ 26,492	$ 22,345	$ 60,637	$ 111,317	$ 202,211
Earnings per share:(a)
Basic (in dollars per share)		$ 0.12	$ 0.46	$ 0.32	$ 0.60	$ 0.54	$ 0.83	$ 0.68	$ 0.58	$ 1.49	$ 2.63	$ 5.20
Diluted (in dollars per share)		$ 0.12	$ 0.46	$ 0.32	$ 0.59	$ 0.54	$ 0.83	$ 0.68	$ 0.57	$ 1.48	$ 2.62	$ 5.18
Electronic Funds Source LLC
Business Acquisition [Line Items]
Stock issued for purchase of EFS (in shares)	4,012