Green Dot (GDOT) 10-Q 8 Nov 18 2018 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Oct. 31, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	GREEN DOT CORP
Trading Symbol	GDOT
Entity Central Index Key	1,386,278
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Common Stock, Shares Outstanding		52,701,571

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Unrestricted cash and cash equivalents	$ 1,037,617	$ 919,243
Restricted cash	559	90,852
Investment securities available-for-sale, at fair value	14,946	11,889
Settlement assets	291,113	209,399
Accounts receivable, net	27,405	35,277
Prepaid expenses and other assets	46,150	47,086
Income tax receivable	5,071	7,459
Total current assets	1,422,861	1,321,205
Investment securities available-for-sale, at fair value	208,931	141,620
Loans to bank customers, net of allowance for loan losses of $1,334 and $291 as of September 30, 2018 and December 31, 2017, respectively	21,917	18,570
Prepaid expenses and other assets	7,657	8,179
Property and equipment, net	110,205	97,282
Deferred expenses	8,008	21,791
Net deferred tax assets	6,691	6,507
Goodwill and intangible assets	557,790	582,377
Total assets	2,344,060	2,197,531
Current liabilities:
Accounts payable	30,205	34,863
Deposits	1,006,202	1,022,180
Obligations to customers	144,278	95,354
Settlement obligations	14,885	6,956
Amounts due to card issuing banks for overdrawn accounts	2,274	1,371
Other accrued liabilities	137,516	123,397
Deferred revenue	18,195	30,875
Note payable	20,906	20,906
Income tax payable	68	74
Total current liabilities	1,374,529	1,335,976
Other accrued liabilities	26,985	30,520
Note payable	43,025	58,705
Net deferred tax liabilities	7,791	7,780
Total liabilities	1,452,330	1,432,981
Commitments and contingencies (Note 16)
Stockholders’ equity:
Class A common stock, $0.001 par value; 100,000 shares authorized as of September 30, 2018 and December 31, 2017; 52,664 and 51,136 shares issued and outstanding as of September 30, 2018 and December 31, 2017, respectively	53	51
Additional paid-in capital	378,103	354,789
Retained earnings	514,871	410,440
Accumulated other comprehensive loss	(1,297)	(730)
Total stockholders’ equity	891,730	764,550
Total liabilities and stockholders’ equity	$ 2,344,060	$ 2,197,531

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Allowance for loan losses	$ 1,334	$ 291
Common Class A (in shares)
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	52,664,000	51,136,000
Common stock, shares outstanding (in shares)	52,664,000	51,136,000

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating revenues:
Total operating revenues	$ 230,577	$ 201,613	$ 803,924	$ 677,162
Operating expenses:
Sales and marketing expenses	72,745	65,586	247,191	207,415
Compensation and benefits expenses	57,070	47,271	166,055	139,355
Processing expenses	43,654	34,027	138,442	119,723
Other general and administrative expenses	62,193	41,677	153,760	116,050
Total operating expenses	235,662	188,561	705,448	582,543
Operating income	(5,085)	13,052	98,476	94,619
Interest income	6,153	2,635	17,542	7,812
Interest expense	(1,388)	(1,397)	(4,530)	(4,595)
(Loss) income before income taxes	(320)	14,290	111,488	97,836
Income tax (benefit) expense	(4,893)	651	7,057	24,177
Net income	$ 4,573	$ 13,639	$ 104,431	$ 73,659
Basic earnings per common share (in usd per share)	$ 0.09	$ 0.27	$ 2.01	$ 1.46
Diluted earnings per common share (in usd per share)	$ 0.08	$ 0.26	$ 1.92	$ 1.40
Basic weighted-average common shares issued and outstanding (in shares)	52,580	50,519	52,046	50,330
Diluted weighted-average common shares issued and outstanding (in shares)	54,615	52,923	54,437	52,788
Card revenues and other fees
Operating revenues:
Total operating revenues	$ 113,474	$ 100,781	$ 364,317	$ 309,090
Processing and settlement service revenues
Operating revenues:
Total operating revenues	43,043	36,681	203,901	179,031
Interchange revenues
Operating revenues:
Total operating revenues	$ 74,060	$ 64,151	$ 235,706	$ 189,041

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 4,573	$ 13,639	$ 104,431	$ 73,659
Other comprehensive loss
Unrealized holding losses, net of tax	(206)	(199)	(567)	(206)
Comprehensive income	$ 4,367	$ 13,440	$ 103,864	$ 73,453

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Operating activities
Net income	$ 104,431	$ 73,659
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of property and equipment	28,154	25,282
Amortization of intangible assets	24,586	22,926
Provision for uncollectible overdrawn accounts	63,358	58,505
Employee stock-based compensation	37,373	27,384
Amortization of premium on available-for-sale investment securities	914	1,157
Change in fair value of contingent consideration	13,500	(7,500)
Amortization of deferred financing costs	1,195	1,191
Impairment of capitalized software	352	1,066
Changes in operating assets and liabilities:
Accounts receivable, net	(55,486)	(35,866)
Prepaid expenses and other assets	1,458	(4,775)
Deferred expenses	13,783	9,025
Accounts payable and other accrued liabilities	(13,315)	(12,541)
Deferred revenue	(11,587)	(12,764)
Income tax receivable/payable	2,452	14,711
Other, net	3,174	1,888
Net cash provided by operating activities	214,342	163,348
Investing activities
Purchases of available-for-sale investment securities	(128,991)	(58,665)
Proceeds from maturities of available-for-sale securities	45,774	57,784
Proceeds from sales of available-for-sale securities	11,125	29,074
Payments for acquisition of property and equipment	(43,397)	(32,373)
Net increase in loans	(5,617)	(13,732)
Acquisition, net of cash acquired	0	(141,493)
Net cash used in investing activities	(121,106)	(159,405)
Financing activities
Borrowings from notes payable	0	20,000
Repayments of borrowings from notes payable	(16,875)	(36,875)
Borrowings on revolving line of credit	0	335,000
Repayments on revolving line of credit	0	(335,000)
Proceeds from exercise of options	19,123	18,183
Taxes paid related to net share settlement of equity awards	(33,180)	(12,737)
Net (decrease) increase in deposits	(5,506)	97,270
Net decrease in obligations to customers	(24,861)	(11,835)
Contingent consideration payments	(3,856)	(1,907)
Repurchase of Class A common stock	0	(50,000)
Deferred financing costs	0	(164)
Net cash (used in) provided by financing activities	(65,155)	21,935
Net increase in unrestricted cash, cash equivalents and restricted cash	28,081	25,878
Unrestricted cash, cash equivalents and restricted cash, beginning of period	1,010,095	744,761
Unrestricted cash, cash equivalents and restricted cash, end of period	1,038,176	770,639
Cash paid for interest	3,335	3,404
Cash paid for income taxes	4,313	9,408
Total unrestricted cash, cash equivalents and restricted cash, end of period	$ 1,010,095	$ 744,761

Organization

Organization	9 Months Ended
	Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Organization Green Dot Corporation (“we,” “our,” or “us” refer to Green Dot Corporation and its consolidated subsidiaries), is a financial technology leader and bank holding company with a mission to power the banking industry’s branchless future. Enabled by proprietary technology and our wholly-owned commercial bank charter, our “Banking as a Service,” or "BaaS" platform is used by a growing list of America’s most prominent consumer and technology companies to design and deploy their own bespoke banking solutions to their customers and partners, while we use that same integrated technology and banking platform to design and deploy our own leading collection of banking and financial services products directly to consumers through one of the largest retail banking distribution platforms in America. Our products are marketed under brand names such as Green Dot, GoBank, MoneyPak, AccountNow, RushCard and RapidPay, and can be acquired through more than 100,000 retailers nationwide, thousands of corporate paycard partners, several “direct-2-consumer” branded websites, thousands of tax return preparation offices and accounting firms, thousands of neighborhood check cashing locations and both of the leading app stores. We are headquartered in Pasadena, California, with additional facilities throughout the United States and in Shanghai, China. As the regulated entity and issuing bank for substantially all products and services we provide, whether our own or on behalf of a BaaS platform partner, we are directly accountable for all aspects of each program’s integrity, inclusive of ensuring the program’s compliance with all applicable banking regulations, applicable state and federal law and our various internal governance policies and procedures related to all areas of risk and compliance, in addition to deploying enterprise-class risk management practices and procedures to ensure each program’s initial and ongoing safety and soundness. Our products and services: We offer consumers a broad collection of financial products and services managed through several diverse business lines which are then made available to consumers through a widely-available “branchless" distribution network in the United States. Many of the products and services we internally create and distribute are marketed under the Green Dot brand name, which we believe is both a well-known and highly trusted brand name for millions of consumers. Our branchless network consists of: • distribution arrangements with approximately 100,000 mostly major chain retail locations, which we refer to as “retail distributors” and thousands of neighborhood Financial Service Center locations; • several differently branded, Green Dot-owned and operated direct-to-consumer online and direct mail customer acquisition platforms; • corporate distribution partnerships with businesses that provide payroll cards to their employees to receive wage disbursements; • more than 25,000 small and large tax preparation companies and individual tax preparers, which are sometimes referred to as electronic return originators, or “EROs”, who are able to offer our products and services to their customers through the use of various tax preparation industry software packages with which our products are integrated; • apps compatible with the iOS and Android operating systems downloaded through the corresponding app store; and • platform partners’ distribution channels that those partners use to acquire customers for their bespoke products and services that are powered by our BaaS Platform. Our products and services include several deposit account programs, such as network-branded reloadable prepaid debit cards marketed under several leading consumer brand names, which we collectively refer to as "GPR cards," consumer checking accounts, small business checking accounts, network-branded gift cards (known as open-loop), secured credit cards and other financial services. We also offer several products and services that specialize in facilitating the movement of cash on behalf of consumers and businesses. These products and services include: our proprietary swipe reload system for crediting cash onto an enabled payment card by swiping the payment card at the point of sale at any Green Dot Network participating retailer; MoneyPak, a product that allows a consumer to add funds to accounts we issue or accounts issued by other United States chartered and regulated third party banks; and e-cash remittance services, a service that allows a consumer to transfer money to a smartphone for fulfillment at a Green Dot participating retailer. We refer to these services collectively as our cash transfer products. We also provide disbursement services through our Simply Paid platform that enables a payment solution for companies to pay their workforce and customers in the time and Note 1—Organization (continued) manner they desire and provide tax refund transfers that provide the processing technology to facilitate receipt of a taxpayers' refund proceeds. Our BaaS Platform: Through our BaaS Platform, we currently offer the following types of products and services in partnership with several of America’s largest retail, consumer, technology and financial services companies: • Mobile banking; • Loan disbursement accounts; • Spend-based Mobile P2P services, such as Apple Pay Cash; • Money transfer services; • GPR cards; • Network branded "open loop" gift cards; • Instant payment and wage disbursements; • Small business checking accounts and debit cards; and • Consumer checking accounts.

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America, or GAAP. We consolidated our wholly-owned subsidiaries and eliminated all significant intercompany balances and transactions. We have also prepared the accompanying unaudited consolidated financial statements in conformity with the instructions to Form 10-Q and Article 10 of Regulation S-X and, consequently, they do not include all of the annual disclosures required by GAAP. Reference is made to our Annual Report on Form 10-K for the year ended December 31, 2017 for additional disclosures, including a summary of our significant accounting policies. There have been no material changes to our significant accounting policies during the nine months ended September 30, 2018 , other than the adoption of the accounting pronouncements discussed below. In our opinion, the accompanying unaudited consolidated financial statements contain all adjustments, consisting of normal and recurring items, except as otherwise noted, necessary for the fair presentation of our financial position, results of operations and cash flows for the interim periods presented. Recent Accounting Pronouncements Recently issued accounting pronouncements not yet adopted In August 2018, the FASB issued ASU No. 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract ("ASU 2018-15") , which amends ASC 350-40 to address implementation costs incurred in a cloud computing arrangement (CCA) that is a service contract. ASU 2018-15 aligns the accounting for costs incurred to implement a CCA that is a service arrangement with the guidance on capitalizing costs associated with developing or obtaining internal-use software. As a result, certain implementation costs incurred by companies under hosting arrangements will be deferred and amortized. ASU 2018-15 is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact of the pronouncement on our consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other ("ASU 2017-04") : Simplifying the Test for Goodwill Impairment , which simplifies the existing two-step guidance for goodwill impairment testing by eliminating the second s tep resulting in a write-down to goodwill equal to the initial amount of impairment determined in step one. The ASU is to be applied prospectively for reporting periods beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed after January 1, 2017. We are currently evaluating the impact of the provisions of ASU 2017-04 on our consolidated financial statements; however, we do not anticipate it will have a material impact upon adoption. Note 2—Summary of Significant Accounting Policies (continued) In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ("ASU 2016-13") that requires financial assets measured at amortized cost be presented at the net amount expected to be collected. Credit losses on available-for-sale debt securities should be recorded through an allowance for credit losses limited by the amount that the fair value is less than amortized cost. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact of ASU 2016-13 on our consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) ("ASU 2016-02") in order to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under previous GAAP. The guidance has been modified through additional technical corrections since its original issuance, including optional transition relief as provided for under ASU No. 2018-11- Leases (Topic 842): Targeted Improvements . ASU 2016-02 requires that a lessee should recognize a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for leases with a term greater than 12 months. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those periods and early adoption is permitted. We are currently assessing the impact of the adoption of this principle on our consolidated financial statements. We have reviewed the requirements under the new standard, and are in the process of quantifying its effect on our consolidated financial statements upon adoption and assessing its impact on our related disclosures or our internal controls over financial reporting. We anticipate adopting this ASU on January 1, 2019 on a prospective basis with a cumulative effect adjustment to retained earnings, if any, upon adoption. Recently adopted accounting pronouncements In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09"), and has been modified through additional technical corrections since its original issuance (collectively ASC 606). ASU 2014-09 supersedes nearly all existing revenue recognition guidance under current GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. The standard defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under previous GAAP. The standard allows companies to apply either a full retrospective approach, which requires applying the standard to each prior year reporting period presented, or a modified retrospective approach with a cumulative effect adjustment recognized upon adoption. We adopted the provisions of the standard on January 1, 2018 using the modified retrospective approach, which did not result in any cumulative adjustment to opening retained earnings nor did it have a material impact on our consolidated financial statements. The adoption of ASU 2014-09, however, requires expanded disclosures under the new guidance. See Note 3 - Revenues for further information and additional discussion around changes identified to our policies under the new accounting pronouncement. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). ASU 2016-01 revises the classification and measurement of investments in certain equity investments and the presentation of certain fair value changes for certain financial liabilities measured at fair value. ASU 2016-01 requires the change in fair value of many equity investments to be recognized in net income. We adopted the provisions of ASU 2016-01 on January 1, 2018, the result of which did not have any impact upon our consolidated financial statements. In November 2016, the FASB issued ASU No. 2016-18, Restricted Cash ("ASU 2016-18"), to require that restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total cash amounts shown on the statement of cash flows. Consequently, transfers between cash and restricted cash will not be presented as a separate line item in the operating, investing or financing sections of the cash flow statement. The amendments should be applied retrospectively to each period presented. We adopted the provisions of ASU 2016-18 on January 1, 2018, the effect of which resulted in an immaterial reclassification in presentation on our statement of cash flows and had no effect on our consolidated financial results. Note 2—Summary of Significant Accounting Policies (continued) In February 2018, the FASB issued ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ("ASU 2018-02"). Under existing U.S. GAAP, the effects of changes in tax rates and laws on deferred tax balances are recorded as a component of income tax expense in the period in which the law was enacted. When deferred tax balances related to items originally recorded in accumulated other comprehensive income are adjusted, certain tax effects become stranded in accumulated other comprehensive income. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the 2017 Tax Cuts and Jobs Act. The amendments in this ASU also require certain disclosures about stranded tax effects. We adopted the provisions of ASU 2018-02 as of December 31, 2017, the result of which did not have a material impact upon our consolidated financial statements.

Revenues

Revenues	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Revenues	Revenues Adoption of ASC 606 On January 1, 2018, we adopted ASC 606 using the modified retrospective method applied to contracts which were not completed upon adoption, the impact of which did not result in any cumulative adjustment to our retained earnings. Results for reporting periods beginning after January 1, 2018 are presented under ASC 606, while prior period amounts have not been adjusted and continue to be reported in accordance with our historical accounting policies. The impact of our adoption of ASC 606 was limited to a change in presentation of certain incentive agreements. Prior to the adoption of ASC 606, incentive payments with our retail distributors and other partners had generally been recorded as a reduction to revenues over the related period of benefit the incentive payment related. Upon the adoption of ASC 606, such payments are classified as sales and marketing expenses since these contractual arrangements have been determined to be outside the scope of contracts with our customers under the new accounting standard. The total amount of incentive payments recognized was $1.8 million and $1.3 million for the three months ended September 30, 2018 and 2017 , respectively, and $5.3 million and $3.6 million for the nine months ended September 30, 2018 and 2017 , respectively. Accounting Policy Update Our operating revenues consist of card revenues and other fees, processing and settlement service revenues and interchange revenues. The core principle of the new revenue standard is that these revenues will be recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services, as determined under a five-step process. A description of our principal revenue generating activities is as follows: Card Revenues and Other Fees Card revenues and other fees consist of monthly maintenance fees, new card fees, ATM fees, and other card revenues. We earn these fees based upon the underlying terms and conditions with each of our cardholders that obligate us to stand ready to provide account services to each of our cardholders over the contract term. Agreements with our cardholders are considered daily service contracts as they are not fixed in duration. We charge maintenance fees on a monthly basis pursuant to the terms and conditions in the applicable cardholder agreements. We recognize monthly maintenance fees ratably over each day in the monthly bill cycle in which the fee is assessed, which represents the period our cardholders receive the benefits of our services and our performance obligation is satisfied. We charge new card fees when a consumer purchases a new card in a retail store. The new card fee provides our cardholders a material right and accordingly, we defer and recognize new card fee revenues on a straight-line basis over our average card lifetime, which is currently five months for our GPR cards and six months for our gift cards. We determine the average card lifetime based on our recent historical data for comparable products. We measure card lifetime for our GPR cards as the time, inclusive of reload activity, between sale (or activation) of the card and the date of the last positive balance. We measure the card lifetime for our gift cards as the redemption period during which cardholders initiate the substantial majority of their transactions. We reassess average card lifetime quarterly. We report the unearned portion of new card fees as a component of deferred revenue in our consolidated balance sheets. See Contract Balances below for further information. Note 3—Revenues (continued) We charge ATM fees to cardholders when they withdraw money at certain ATMs in accordance with the terms and conditions in our cardholder agreements. We recognize ATM fees when the withdrawal is made by the cardholder, which is the point in time our performance obligation is satisfied and service is performed. Since our cardholder agreements are considered daily service contracts, our performance obligations for these types of transactional based fees are satisfied on a daily basis, or as each transaction occurs. Other revenues consist primarily of revenue associated with our gift card program, transaction-based fees and fees associated with optional products or services, which we offer our cardholders at their election. Since our performance obligations are settled daily, we recognize most of these fees at the point in time the transactions occur which is when the underlying performance obligation is satisfied. In the case of our gift card program, we record the related revenues using the redemption method. Substantially all our fees are collected from our cardholders at the time the fees are assessed and debited from their account balance. Processing and Settlement Service Revenues Our processing and settlement services consist of cash transfer revenues, Simply Paid disbursement revenues, and tax refund processing service revenues. We generate cash transfer revenues when consumers purchase our cash transfer products (reload services) in a retail store. Our reload services are subject to the same terms and conditions in each of the applicable cardholder agreements as discussed above. We recognize these revenues at the point in time the reload services are completed. Similarly, we earn Simply Paid disbursement fees from our business partners as payment disbursements are made. We earn tax refund processing service revenues when a customer of a third-party tax preparation company chooses to pay their tax preparation fee through the use of our tax refund processing services. Revenues we earn from these services are generated from our contractual relationships with the tax software transmitters. These contracts may be multi-year agreements and vary in length, however, our underlying promise obligates us to process each refund transfer on a transaction by transaction basis as elected by the taxpayer. Accordingly, we recognize tax refund processing service revenues at the point in time we satisfy our performance obligation by remitting each taxpayer’s proceeds from his or her tax return. Interchange We earn interchange revenues from fees remitted by the merchant’s bank, which are based on rates established by the payment networks, such as Visa and MasterCard, when account holders make purchase transactions using our card products and services. We recognize interchange revenues at the point in time the transactions occur, as our performance obligation is satisfied. Principal vs Agent For all our significant revenue-generating arrangements, we record revenues on a gross basis except for our tax refund processing service revenues which are recorded on a net basis. Disaggregation of Revenues Our products and services are offered only to customers within the United States. We determine our operating segments based on how our chief operating decision maker manages our operations, makes operating decisions and evaluates operating performance. Within our segments, we believe that the nature, amount, timing and uncertainty of our revenue and cash flows and how they are affected by economic factors can be further illustrated based on the timing in which revenue for each of our products and services is recognized. Note 3—Revenues (continued) The following table disaggregates our revenues by the timing in which the revenue is recognized: Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Account Services Processing and Settlement Services Account Services Processing and Settlement Services Timing of revenue recognition (In thousands) Transferred at a point in time $ 120,427 $ 43,040 $ 381,738 $ 203,888 Transferred over time 66,196 914 215,612 2,686 Operating revenues $ 186,623 $ 43,954 $ 597,350 $ 206,574 Within our Account Services segment, revenues recognized at a point in time are comprised of ATM fees, interchange, and other similar transaction-based fees. Revenues recognized over time consists of new card fees, monthly maintenance fees and revenue earned from gift cards. Substantially all of our processing and settlement services are recognized at a point in time. Refer to Note 18- Segment Informatio n for our revenues disaggregated by our products and services and the components to our total operating revenues on our Consolidated Statements of Operations for additional information. Significant Judgments and Estimates Transaction prices related to our account services are based on stand-alone fees stated within the terms and conditions and may also include certain elements of variable consideration depending upon the product’s features, such as cardholder incentives, monthly fee concessions and reserves on accounts that may become overdrawn. We estimate such amounts using historical data and customer behavior patterns to determine these estimates which are recorded as a reduction to the corresponding fee revenue. Additionally, while the number of transactions that a cardholder may perform is unknown, any uncertainty is resolved at the end of each daily service contract. Contract Balances As disclosed on our Consolidated Balance Sheets, we record deferred revenue for any upfront payments received in advance of our performance obligations being satisfied. These contract liabilities consist principally of unearned new card fees and monthly maintenance fees. We recognized approximately $0.1 million and $28.5 million for the three and nine months ended September 30, 2018 , respectively, or substantially all of the amount of contract liabilities included in deferred revenue at the beginning of the period and did not recognize any revenue during these periods from performance obligations satisfied in previous periods. Changes in the deferred revenue balance are driven primarily by the amount of new card fees recognized during the period, offset by the deferral of new card fees associated with cards sold during the period. Costs to Obtain or Fulfill a Contract Our incremental direct costs of obtaining a contract consist primarily of revenue share payments we make to our retail partners associated with new card sales. These commissions are generally capitalized upon payment and expensed over the period the corresponding revenue is recognized. These deferred commissions are not material and are included in deferred expenses on our Consolidated Balance Sheets. Practical Expedients and Exemptions Any unsatisfied performance obligations at the end of the period relate to contracts with customers that either have an original expected length of one year or less or are contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed. Therefore, no additional disclosure is provided for these performance obligations.

Business Combination

Business Combination	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Business Combination	Business Combination On February 28, 2017, we completed our acquisition of all the membership interests of UniRush, LLC ("UniRush"), an online direct-to-consumer GPR card and corporate payroll card provider. The fair value of the total consideration in connection with the acquisition was approximately $163.7 million , which included cash and contingent consideration in the form of an earn-out. We financed the transaction with $142.2 million in cash, of which $95 million was raised from a combination of our Revolving Facility, as discussed in Note 10 — Note Payable , and subordinated notes payable of $20 million to the selling shareholders of UniRush. The subordinated notes were repaid during the three months ended March 31, 2017. The transaction terms include an earn-out equal to the greater of (i) a specified percentage of the revenue generated by the online direct-to-consumer GPR card portfolio for the five-year period following the closing or (ii) $20 million , payable quarterly over the five years. The following table summarizes the fair value of consideration transferred: Consideration (In thousands) Cash, including proceeds from notes payable $ 142,154 Fair value of contingent consideration 21,500 Total consideration $ 163,654 The allocation of the purchase price was as follows: February 28, 2017 (In thousands) Assets: Cash and cash equivalents $ 656 Accounts receivable, net 5,745 Prepaid expenses and other assets 5,146 Property and equipment, net 4,233 Intangible assets 69,000 Goodwill 93,435 Total assets: 178,215 Liabilities: Accounts payable 10,861 Other liabilities 3,700 Total liabilities: 14,561 Net assets acquired $ 163,654 Goodwill of approximately $93.4 million represents the excess of the purchase price over the estimated fair value of the underlying identifiable tangible and intangible assets acquired and liabilities assumed. The goodwill arises from the opportunity for synergies and economies of scale from the combined companies, and expanding our reach into the online direct-to-consumer and corporate payroll distribution channels. Although the goodwill will not be amortized for financial reporting purposes, it is anticipated that substantially all of the goodwill will be deductible for federal tax purposes over the statutory period of 15 years. Intangible assets consist primarily of customer relationships and trade names of approximately $58.5 million and $5.5 million , respectively. The customer relationships will be amortized over its estimated useful life of 5 - 10 years and the trade names will be amortized over a period of 15 years . Our acquisition of UniRush was accounted for under the acquisition method of accounting, with the operating results of UniRush included in our consolidated statements of operations beginning March 1, 2017. Transaction costs incurred in connection with the acquisition were not material. Note 4—Business Combination (continued) Unaudited pro forma financial information The following unaudited pro forma summary financial results for the nine months ended September 30, 2017 present the consolidated results of operations as if the acquisition of UniRush had occurred as of January 1, 2016, after the effect of certain adjustments, including interest expense on the debt used to fund the purchase, amortization of certain identifiable intangible assets, income and expense items not attributable to ongoing operations and related tax effects. The unaudited pro forma condensed consolidated statements of operations does not include any adjustments for any restructuring activities, operating efficiencies or cost savings. The pro forma results for the nine months ended September 30, 2017 have been presented for comparative purposes only and are not indicative of what would have occurred had the UniRush acquisition been made as of January 1, 2016, or of any potential results which may occur in the future. Nine Months Ended September 30, 2018 2017 (In thousands, except per share data) (Pro forma) Net revenues $ 803,924 $ 696,447 Net income attributable to common stock $ 104,431 $ 66,026 Basic earnings per common share $ 2.01 $ 1.31 Diluted earnings per common share $ 1.92 $ 1.25 Basic weighted-average common shares issued and outstanding 52,046 50,330 Diluted weighted-average common shares issued and outstanding 54,437 52,788

Investment Securities

Investment Securities	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Investment Securities	Investment Securities Our available-for-sale investment securities were as follows: Amortized cost Gross unrealized gains Gross unrealized losses Fair value (In thousands) September 30, 2018 Negotiable certificate of deposit $ 15,000 $ — $ — $ 15,000 Agency bond securities 19,712 — (128 ) 19,584 Agency mortgage-backed securities 114,158 43 (1,730 ) 112,471 Municipal bonds 507 — (30 ) 477 Asset-backed securities 76,452 2 (109 ) 76,345 Total investment securities $ 225,829 $ 45 $ (1,997 ) $ 223,877 December 31, 2017 Corporate bonds $ 1,000 $ — $ — $ 1,000 U.S. Treasury notes 10,921 — (46 ) 10,875 Agency mortgage-backed securities 121,037 52 (1,055 ) 120,034 Municipal bonds 742 4 (7 ) 739 Asset-backed securities 20,952 — (91 ) 20,861 Total investment securities $ 154,652 $ 56 $ (1,199 ) $ 153,509 Note 5—Investment Securities (continued) As of September 30, 2018 and December 31, 2017 , the gross unrealized losses and fair values of available-for-sale investment securities that were in unrealized loss positions were as follows: Less than 12 months 12 months or more Total fair value Total unrealized loss Fair value Unrealized loss Fair value Unrealized loss (In thousands) September 30, 2018 Agency bond securities $ 19,584 $ (128 ) $ — $ — $ 19,584 $ (128 ) Agency mortgage-backed securities 32,282 (328 ) 65,414 (1,402 ) 97,696 (1,730 ) Municipal bonds 346 (21 ) 131 (9 ) 477 (30 ) Asset-backed securities 55,665 (65 ) 9,259 (44 ) 64,924 (109 ) Total investment securities $ 107,877 $ (542 ) $ 74,804 $ (1,455 ) $ 182,681 $ (1,997 ) December 31, 2017 U.S. Treasury notes $ 4,588 $ (21 ) $ 6,288 $ (25 ) $ 10,876 $ (46 ) Agency mortgage-backed securities 62,683 (453 ) 44,159 (602 ) 106,842 (1,055 ) Municipal bonds — — 193 (7 ) 193 (7 ) Asset-backed securities 2,134 (2 ) 18,727 (89 ) 20,861 (91 ) Total investment securities $ 69,405 $ (476 ) $ 69,367 $ (723 ) $ 138,772 $ (1,199 ) We did not record any other-than-temporary impairment losses during the three and nine months ended September 30, 2018 or 2017 on our available-for-sale investment securities. We do not intend to sell these investments and we have determined that it is more likely than not that we will not be required to sell these investments before recovery of their amortized cost bases, which may be at maturity. As of September 30, 2018 , the contractual maturities of our available-for-sale investment securities were as follows: Amortized cost Fair value (In thousands) Due in one year or less $ 14,962 $ 14,946 Due after one year through five years 19,750 19,638 Due after five years through ten years — — Due after ten years 507 477 Mortgage and asset-backed securities 190,610 188,816 Total investment securities $ 225,829 $ 223,877 The expected payments on mortgage-backed and asset-backed securities may not coincide with their contractual maturities because the issuers have the right to call or prepay certain obligations.

Accounts Receivable

Accounts Receivable	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Accounts Receivable	Accounts Receivable Accounts receivable, net consisted of the following: September 30, 2018 December 31, 2017 (In thousands) Overdrawn account balances due from cardholders $ 21,033 $ 17,856 Reserve for uncollectible overdrawn accounts (16,280 ) (14,471 ) Net overdrawn account balances due from cardholders 4,753 3,385 Trade receivables 8,359 4,231 Reserve for uncollectible trade receivables (1,101 ) (3 ) Net trade receivables 7,258 4,228 Receivables due from card issuing banks 6,779 6,309 Fee advances 3,010 16,194 Other receivables 5,605 5,161 Accounts receivable, net $ 27,405 $ 35,277 Activity in the reserve for uncollectible overdrawn accounts consisted of the following: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands) Balance, beginning of period $ 17,087 $ 13,619 $ 14,471 $ 11,932 Provision for uncollectible overdrawn accounts: Fees 17,404 19,124 53,536 53,393 Purchase transactions 4,137 1,943 9,822 5,112 Charge-offs (22,348 ) (19,299 ) (61,549 ) (55,050 ) Balance, end of period $ 16,280 $ 15,387 $ 16,280 $ 15,387

Loans to Bank Customers

Loans to Bank Customers	9 Months Ended
	Sep. 30, 2018
Loans and Leases Receivable Disclosure [Abstract]
Loans to Bank Customers	Loans to Bank Customers The following table presents total outstanding loans, gross of the related allowance for loan losses, and a summary of the related payment status: 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Total Past Due Total Current or Less Than 30 Days Past Due Total Outstanding (In thousands) September 30, 2018 Residential $ — $ — $ 9 $ 9 $ 3,786 $ 3,795 Commercial 8 — — 8 172 180 Installment 11 2 — 13 996 1,009 Secured credit card 1,582 1,505 1,104 4,191 14,076 18,267 Total loans $ 1,601 $ 1,507 $ 1,113 $ 4,221 $ 19,030 $ 23,251 Percentage of outstanding 6.9 % 6.5 % 4.8 % 18.2 % 81.8 % 100.0 % December 31, 2017 Residential $ — $ — $ — $ — $ 3,554 $ 3,554 Commercial — — — — 315 315 Installment 1 — — 1 1,378 1,379 Secured credit card 1,223 593 424 2,240 11,373 13,613 Total loans $ 1,224 $ 593 $ 424 $ 2,241 $ 16,620 $ 18,861 Percentage of outstanding 6.5 % 3.1 % 2.3 % 11.9 % 88.1 % 100.0 % Note 7—Loans to Bank Customers (continued) Secured Credit Card Loans On August 31, 2017, we completed an asset acquisition of a secured credit card portfolio for approximately $8.1 million . In exchange for the payment, we received approximately $8.2 million of secured credit card receivables. All of our credit card receivables are collateralized by the cardholders' security deposits, which also act as the cardholders' credit limit. Nonperforming Loans The following table presents the carrying value, gross of the related allowance for loan losses, of our nonperforming loans. See Note 2 — Summary of Significant Accounting Policies to the Consolidated Financial Statements of our Annual Report on Form 10-K for the year ended December 31, 2017 for further information on the criteria for classification as nonperforming. September 30, 2018 December 31, 2017 (In thousands) Residential $ 422 $ 502 Installment 175 191 Total loans $ 597 $ 693 Credit Quality Indicators We closely monitor and assess the credit quality and credit risk of our loan portfolio on an ongoing basis. We continuously review and update loan risk classifications. We evaluate our loans using non-classified or classified as the primary credit quality indicator. Classified loans are those loans that have demonstrated credit weakness where we believe there is a heightened risk of principal loss, including all impaired loans. Classified loans are generally internally categorized as substandard, doubtful or loss, consistent with regulatory guidelines. The table below presents the carrying value, gross of the related allowance for loan losses, of our loans within the primary credit quality indicators related to our loan portfolio: September 30, 2018 December 31, 2017 Non-Classified Classified Non-Classified Classified (In thousands) Residential $ 3,373 $ 422 $ 3,038 $ 516 Commercial 180 — 315 — Installment 665 344 1,059 320 Secured credit card 18,267 — 13,613 — Total loans $ 22,485 $ 766 $ 18,025 $ 836 Impaired Loans and Troubled Debt Restructurings When, for economic or legal reasons related to a borrower’s financial difficulties, we grant a concession for other than an insignificant period of time to a borrower that we would not otherwise consider, the related loan is classified as a Troubled Debt Restructuring, or TDR. Our TDR modifications involve an extension of the maturity date at a stated interest rate lower than the current market rate for new debt with similar risk. The following table presents our impaired loans and loans that we modified as TDRs as of September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 Unpaid Principal Balance Carrying Value Unpaid Principal Balance Carrying Value (In thousands) Residential $ 422 $ 344 $ 516 $ 452 Installment 209 60 262 120 Note 7—Loans to Bank Customers (continued) Allowance for Loan Losses Activity in the allowance for loan losses consisted of the following: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands) Balance, beginning of period $ 1,173 $ 319 $ 291 $ 277 Provision for loans 1,036 72 2,270 135 Loans charged off (964 ) (158 ) (1,598 ) (189 ) Recoveries of loans previously charged off 89 4 371 14 Balance, end of period $ 1,334 $ 237 $ 1,334 $ 237

Employee Stock-Based Compensati

Employee Stock-Based Compensation	9 Months Ended
	Sep. 30, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Stock-Based Compensation	Employee Stock-Based Compensation We currently grant restricted equity awards to employees and directors under our 2010 Equity Incentive Plan. Additionally, through our 2010 Employee Stock Purchase Plan, employees are able to purchase shares of our Class A common stock at a discount through payroll deductions. We have reserved shares of our Class A common stock for issuance under these plans. Restricted Stock Units The following table summarizes restricted stock units with only service conditions granted under our 2010 Equity Incentive Plan: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands, except per share data) Restricted stock units granted 105 106 288 301 Weighted-average grant-date fair value $ 79.71 $ 47.19 $ 71.74 $ 36.86 Performance Based Restricted Stock Units We grant performance-based restricted stock units to certain employees which are subject to the attainment of minimum pre-established annual performance targets. The majority of these awards are tied to the achievement of an annual non-GAAP earnings per share target for the grant year. The actual number of shares subject to the award is determined at the end of the annual performance period and may range from zero to 150% percent of the target shares granted. These awards contain an additional service component after each annual performance period is concluded and the unvested balance of the shares determined at the end of the annual performance period will vest over the remaining requisite service period. Compensation expense related to these awards is recognized using the accelerated attribution method over the four -year vesting period based on the fair value of the closing market price of our Class A common stock on the date of the grant and the estimated performance that is expected to be achieved. In the case of our Chief Executive Officer, vesting of the award is based on the achievement of a total shareholder return ("TSR") relative to the S&P 600 index over the three -year performance period. Compensation expense related to these awards is recognized over the performance period based on the grant date fair value through the use of a Monte Carlo simulation and are not subsequently re-measured. Note 8—Employee Stock-Based Compensation (continued) The following table summarizes the performance-based restricted stock units granted under our 2010 Equity Incentive Plan: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands, except per share data) Performance based restricted stock units granted (1) — 1 612 616 Weighted-average grant-date fair value $ — $ 46.28 $ 49.04 $ 36.02 (1 ) Performance awards granted also reflects the impact of any incremental shares awarded during the periods ended for performance periods completed. The grant date fair value for these awards are based on the grant price at the time of the initial award. In April 2018, the compensation committee of our board of directors adopted a policy applicable to all employees that provides for vesting of equity awards in connection with a qualifying retirement (as defined in the policy), with the settlement or payout of those awards to be made in accordance with the applicable vesting schedule pertaining to such awards. The policy applies only with respect to restricted stock units and performance-based restricted stock units granted after January 1, 2018. Under the policy, following a qualified retirement, any substantial risk of forfeiture of the award by the eligible employee is eliminated. Accordingly, the related compensation expense is recognized immediately for awards granted to eligible employees or over the period from the grant date to the date a qualifying retirement is achieved, if less than the stated vesting period. The total stock-based compensation expense recognized was $16.8 million and $11.0 million for the three months ended September 30, 2018 and 2017 , respectively, and $37.4 million and $27.4 million for the nine months ended September 30, 2018 and 2017 , respectively. Total stock-based compensation expense includes amounts related to awards of stock options, restricted stock units (including performance-based restricted stock units) and purchases under our 2010 Employee Stock Purchase Plan, and reflects the effects of the adoption of the retirement policy during the current year.

Deposits

Deposits	9 Months Ended
	Sep. 30, 2018
Deposits [Abstract]
Deposits	Deposits Deposits are categorized as non-interest or interest-bearing deposits as follows: September 30, 2018 December 31, 2017 (In thousands) Non-interest bearing deposit accounts GPR deposits $ 778,753 $ 803,549 Other demand deposits 90,981 61,264 Total non-interest bearing deposit accounts 869,734 864,813 Interest-bearing deposit accounts Checking accounts 114,628 140,555 Savings 9,465 10,523 GPR deposits 7,198 — Time deposits, denominations greater than or equal to $100 3,914 4,752 Time deposits, denominations less than $100 1,263 1,537 Total interest-bearing deposit accounts 136,468 157,367 Total deposits $ 1,006,202 $ 1,022,180 Note 9—Deposits (continued) The scheduled contractual maturities for total time deposits are presented in the table below: September 30, 2018 (In thousands) Due in 2018 $ 569 Due in 2019 1,267 Due in 2020 1,380 Due in 2021 835 Due in 2022 790 Thereafter 336 Total time deposits $ 5,177

Note Payable

Note Payable	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Note Payable	Note Payable In October 2014, we entered into a $225.0 million secured credit agreement with Bank of America, N.A., as an administrative agent, Wells Fargo Bank, National Association, and the other lenders party thereto. The credit agreement provides for: 1) a $75.0 million five -year revolving facility (the "Revolving Facility") and 2) a five -year $150.0 million term loan facility ("Term Facility" and, together with the Revolving Facility, the “Senior Credit Facility"). The credit agreement also includes an accordion feature that, subject to securing additional commitments from existing lenders or new lending institutions, will allow us to increase the aggregate amount of these facilities by up to an additional $50.0 million . As of September 30, 2018 and December 31, 2017 , our outstanding debt, net of deferred financing costs of $1.7 million and $2.9 million , respectively, consisted of the following: September 30, 2018 December 31, 2017 (In thousands) Term facility $ 63,931 $ 79,611 Revolving facility — — Total notes payable $ 63,931 $ 79,611 Quarterly principal payments of $5.6 million are payable on the loans under the Term Facility. During each of the nine months ended September 30, 2018 and 2017 , we made scheduled quarterly principal payments totaling $16.9 million . The Senior Credit Facility matures on October 23, 2019 and any amounts then outstanding are due upon maturity. Interest At our election, loans made under the credit agreement bear interest at 1) a LIBOR rate (the “LIBOR Rate") or 2) a base rate determined by reference to the highest of (a) the Bank of America prime rate, (b) the United States federal funds rate plus 0.50% and (c) a daily rate equal to one-month LIBOR rate plus 1.0% (the “Base Rate"), plus in either case an applicable margin. The applicable margin for borrowings depends on our total leverage ratio and varies from 2.50% to 3.00% for LIBOR Rate loans and 1.50% to 2.00% for Base Rate loans. The effective interest rate on borrowings outstanding as of September 30, 2018 was 4.81% . Interest expense, excluding the amortization of debt issuance costs, related to our Senior Credit Facility was $0.6 million and $1.0 million for the three months ended September 30, 2018 and 2017 , respectively, and $2.3 million and $3.3 million for the nine months ended September 30, 2018 and 2017 , respectively. Covenants and restrictions The Senior Credit Facility contains customary representations and warranties relating to us and our subsidiaries. Obligations under the Senior Credit Facility are secured by first priority liens on, and security interests in, substantially all of our company assets and each Guarantor, as defined in the agreement. The Senior Credit Facility also contains certain affirmative and negative covenants, including negative covenants that limit or restrict, among other things, liens, indebtedness, investments and acquisitions, mergers and fundamental changes, asset sales, restricted payments, changes in the nature of the business, transactions with affiliates and other matters customarily restricted in such agreements. We must maintain a minimum fixed charge coverage ratio and a maximum consolidated leverage ratio at the end of each fiscal quarter, as set forth in the credit agreement. At September 30, 2018 , we were in compliance with all such covenants.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax expense for the nine months ended September 30, 2018 and 2017 differs from the amount computed by applying the statutory federal income tax rate to income before income taxes. The sources and tax effects of the differences are as follows: Nine Months Ended September 30, 2018 2017 U.S. federal statutory tax rate 21.0 % 35.0 % State income taxes, net of federal tax benefit (0.1 ) (0.5 ) General business credits (1.4 ) (3.0 ) Employee stock-based compensation (16.1 ) (8.2 ) IRC 162(m) limitation 2.7 1.7 Other 0.2 (0.3 ) Effective tax rate 6.3 % 24.7 % On December 22, 2017, H.R. 1, known as the Tax Cuts and Jobs Act (the "Tax Act") was signed into law and makes significant changes to U.S. income tax law. Effective in 2018, the Tax Act reduced the U.S. federal corporate tax rate from 35% to 21%, created new taxes on certain foreign-sourced earnings and certain related-party payments, eliminated certain deductions and enhanced and extended through 2026 the option to claim accelerated depreciation deductions on qualified property. Due to the timing of the enactment and the complexity involved in applying the provisions of the Tax Act, we made reasonable estimates of the effects and recorded provisional amounts in our financial statements as of December 31, 2017. We remeasured deferred tax assets and liabilities resulting from the permanent reduction in the U.S. statutory corporate tax rate from 35% to 21% and recorded a provisional tax benefit of $6.3 million . We also analyzed the transition tax on accumulated foreign subsidiary earnings and made a provisional determination that we have no additional tax obligation. As we collect and prepare necessary data, and interpret the Tax Act and any additional guidance issued by the U.S. Treasury Department, the IRS, and other standard-setting bodies, we may make adjustments to the provisional amounts including estimates for certain employment compensation. Those adjustments may materially impact our provision for income taxes and effective tax rate in the period in which the adjustments are made. The SEC has provided up to a one-year measurement period for companies to finalize the accounting for the impacts of this new legislation and we anticipate finalizing our accounting over the next quarter. The effective tax rate for the nine months ended September 30, 2018 and 2017 differs from the statutory federal income tax rate of 21% and 35%, respectively, primarily due to state income taxes, net of federal tax benefits, general business credits, and employee stock-based compensation. The decrease in the effective tax rate for the nine months ended September 30, 2018 as compared to the nine months ended September 30, 2017 is primarily due to the decrease in the statutory federal tax rate noted above and higher excess tax benefits related to stock compensation as a result of an increase in the value of our stock price at the time equity awards are vested or exercised. In addition, the overall decrease in the effective tax rate for the nine months ended September 30, 2018 was partially offset by an increase to the IRC 162(m) limitation on executive compensation due to the Tax Act's repeal of the performance-based exception previously available under IRC 162(m). We establish a valuation allowance when we consider it more-likely-than-not that some portion or all of the deferred tax assets will not be realized. As of September 30, 2018 and 2017 , we did not have a valuation allowance on any of our deferred tax assets as we believed it was more-likely-than-not that we would realize the benefits of our deferred tax assets. We are subject to examination by the Internal Revenue Service, or IRS, and various state tax authorities. We remain subject to examination of our federal income tax return for the years ended December 31, 2014 through 2016. We generally remain subject to examination of our various state income tax returns for a period of four to five years from the respective dates the returns were filed. As of September 30, 2018 , we have net operating loss carryforwards of approximately $37.7 million and $33.7 million for federal and state tax purposes, respectively, which will be available to offset future income. If not used, these carryforwards will expire between 2020 and 2035. In addition, we have state business tax credits of approximately $11.8 million that can be carried forward indefinitely and other state business tax credits of approximately $1.2 million that will expire between 2023 and 2027. Note 11—Income Taxes (continued) As of September 30, 2018 and December 31, 2017 , we had a liability of $6.5 million and $5.6 million , respectively, for unrecognized tax benefits related to various federal and state income tax matters excluding interest, penalties and related tax benefits. The reconciliation of the beginning unrecognized tax benefits balance to the ending balance is as follows: Nine Months Ended September 30, 2018 2017 (In thousands) Beginning balance $ 5,560 $ 7,314 Increases related to positions taken during prior years 470 404 Increases related to positions taken during the current year 1,170 1,119 Decreases related to positions settled with tax authorities — (1,189 ) Decreases as a result of a lapse of applicable statute of limitations (664 ) (1,392 ) Ending balance $ 6,536 $ 6,256 The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate $ 6,536 $ 6,256 As of September 30, 2018 and 2017 , we recognized accrued interest and penalties related to unrecognized tax benefits of approximately $0.3 million .

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2018
Stockholders' Equity Note [Abstract]
Stockholders' Equity	Stockholders' Equity Stock Repurchase Program In June 2015, our Board of Directors authorized, subject to regulatory approval, a repurchase of shares of our Class A Common Stock in an amount up to $150 million under a stock repurchase program with no expiration date. As of November 2017, we have repurchased all $150 million of Class A common stock under the repurchase program. Accelerated Share Repurchases We have entered into accelerated share repurchase arrangements (“ASRs”) with a financial institution from time to time under our stock repurchase program. The following table summarizes our ASR activity for the prior year comparative period: Purchase Period End Date Number of Shares (In thousands) Average Repurchase Price Per Share ASR Amount (In thousands) March 2017 ASR November 2017 1,326 $ 38.64 $ 50,000 (1) (1) We elected to cash settle approximately $2.0 million worth of shares owed back to the counterparty under our March 2017 accelerated share repurchase agreement. The up-front payments are accounted for as a reduction to shareholders’ equity on our consolidated balance sheets in the periods the payments are made. The ASRs are accounted for in two separate transactions: 1) a treasury stock repurchase for the initial shares received and 2) a forward stock purchase contract indexed to our own stock for the unsettled portion of the ASR. The par value of the shares received are recorded as a reduction to common stock with the remainder recorded as a reduction to additional paid-in capital and retained earnings. The ASRs meet all of the applicable criteria for equity classification, and therefore are not accounted for as derivative instruments. The initial repurchase of shares result in an immediate reduction of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted earnings per share. The final number of shares received upon settlement for the ASR is determined based on the volume-weighted average price of our common stock over the term of the agreement less an agreed upon discount and subject to adjustments pursuant to the terms and conditions of the ASR. The shares received are retired in the periods they are delivered, but remain authorized for registration and issuance in the future.

Earnings per Common Share

Earnings per Common Share	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings per Common Share	Earnings per Common Share The calculation of basic and diluted EPS was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands, except per share data) Basic earnings per Class A common share Numerator: Net income $ 4,573 $ 13,639 $ 104,431 $ 73,659 Denominator: Weighted-average Class A shares issued and outstanding 52,580 50,519 52,046 50,330 Basic earnings per Class A common share $ 0.09 $ 0.27 $ 2.01 $ 1.46 Diluted earnings per Class A common share Numerator: Net income $ 4,573 $ 13,639 $ 104,431 $ 73,659 Denominator: Weighted-average Class A shares issued and outstanding 52,580 50,519 52,046 50,330 Dilutive potential common shares: Stock options 214 790 372 764 Restricted stock units 1,032 1,292 1,223 1,404 Performance based restricted stock units 780 306 791 282 Employee stock purchase plan 9 16 5 8 Diluted weighted-average Class A shares issued and outstanding 54,615 52,923 54,437 52,788 Diluted earnings per Class A common share $ 0.08 $ 0.26 $ 1.92 $ 1.40 For the periods presented, we excluded certain restricted stock units and stock options outstanding (as applicable) which could potentially dilute basic EPS in the future, from the computation of diluted EPS as their effect was anti-dilutive. Additionally, we have excluded any performance based restricted stock units for which the performance contingency has not been met as of the end of the period. The following table shows the weighted-average number of shares excluded from the diluted EPS calculation: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands) Class A common stock Options to purchase Class A common stock — 56 — 9 Performance based restricted stock units 223 539 123 301 Total options and restricted stock units 223 595 123 310

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Under applicable accounting guidance, fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We determine the fair values of our financial instruments based on the fair value hierarchy established under applicable accounting guidance which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. There are three levels of inputs used to measure fair value. For more information regarding the fair value hierarchy and how we measure fair value, see Note 2–Summary of Significant Accounting Policies to the Consolidated Financial Statements of our Annual Report on Form 10-K for the year ended December 31, 2017 . Note 14—Fair Value Measurements (continued) As of September 30, 2018 and December 31, 2017 , our assets and liabilities carried at fair value on a recurring basis were as follows: Level 1 Level 2 Level 3 Total Fair Value September 30, 2018 (In thousands) Assets Negotiable certificate of deposit $ — $ 15,000 $ — $ 15,000 Agency bond securities — 19,584 — 19,584 Agency mortgage-backed securities — 112,471 — 112,471 Municipal bonds — 477 — 477 Asset-backed securities — 76,345 — 76,345 Total assets $ — $ 223,877 $ — $ 223,877 Liabilities Contingent consideration $ — $ — $ 13,502 $ 13,502 December 31, 2017 Assets Corporate bonds $ — $ 1,000 $ — $ 1,000 U.S. Treasury notes — 10,875 — 10,875 Agency mortgage-backed securities — 120,034 — 120,034 Municipal bonds — 739 — 739 Asset-backed securities — 20,861 — 20,861 Total assets $ — $ 153,509 $ — $ 153,509 Liabilities Contingent consideration $ — $ — $ 17,358 $ 17,358 We based the fair value of our fixed income securities held as of September 30, 2018 and December 31, 2017 on quoted prices in active markets for similar assets. We had no transfers between Level 1, Level 2 or Level 3 assets or liabilities during the three and nine months ended September 30, 2018 or 2017 . The following table presents changes in our contingent consideration payable for the three and nine months ended September 30, 2018 and 2017 , which is categorized in Level 3 of the fair value hierarchy: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands) Balance, beginning of period $ 14,664 $ 21,911 $ 17,358 $ 8,634 Issuance — — — 18,000 Payments of contingent consideration (1,162 ) (1,184 ) (3,856 ) (1,907 ) Purchase accounting adjustment — — — 3,500 Change in fair value of contingent consideration — — — (7,500 ) Balance, end of period $ 13,502 $ 20,727 $ 13,502 $ 20,727

Fair Value of Financial Instrum

Fair Value of Financial Instruments	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments The following describes the valuation technique for determining the fair value of financial instruments, whether or not such instruments are carried at fair value on our consolidated balance sheets. Short-term Financial Instruments Our short-term financial instruments consist principally of unrestricted and restricted cash and cash equivalents, settlement assets and obligations, and obligations to customers . These financial instruments are short-term in nature, and, accordingly, we believe their carrying amounts approximate their fair values. Under the fair value hierarchy, these instruments are classified as Level 1. Investment Securities The fair values of investment securities have been derived using methodologies referenced in Note 2–Summary of Significant Accounting Policies to the Consolidated Financial Statements of our Annual Report on Form 10-K for the year ended December 31, 2017 . Under the fair value hierarchy, our investment securities are classified as Level 2. Loans We determined the fair values of loans by discounting both principal and interest cash flows expected to be collected using a discount rate commensurate with the risk that we believe a market participant would consider in determining fair value. Under the fair value hierarchy, our loans are classified as Level 3. Deposits The fair value of demand and interest checking deposits and savings deposits is the amount payable on demand at the reporting date. We determined the fair value of time deposits by discounting expected future cash flows using market-derived rates based on our market yields on certificates of deposit, by maturity, at the measurement date. Under the fair value hierarchy, our deposits are classified as Level 2. Contingent Consideration The fair value of contingent consideration obligations, such as the earn-outs associated with our acquisitions of TPG and UniRush, are estimated through valuation models designed to estimate the probability of such contingent payments based on various assumptions. Estimated payments are discounted using present value techniques to arrive at an estimated fair value. Our contingent consideration payable is classified as Level 3 because we use unobservable inputs to estimate fair value, including the probability of achieving certain earnings thresholds and appropriate discount rates. Changes in fair value of contingent consideration are recorded through operating expenses. Note Payable The fair value of our note payable is based on borrowing rates currently available to a market participant for loans with similar terms or maturity. The carrying amount of our note payable approximates fair value because the base interest rate charged varies with market conditions and the credit spread is commensurate with current market spreads for issuers of similar risk. The fair value of the note payable is classified as a Level 2 liability in the fair value hierarchy. Fair Value of Financial Instruments The carrying values and fair values of certain financial instruments that were not carried at fair value, excluding short-term financial instruments for which the carrying value approximates fair value, at September 30, 2018 and December 31, 2017 are presented in the table below. September 30, 2018 December 31, 2017 Carrying Value Fair Value Carrying Value Fair Value (In thousands) Financial Assets Loans to bank customers, net of allowance $ 21,917 $ 21,270 $ 18,570 $ 18,102 Financial Liabilities Deposits $ 1,006,202 $ 1,006,146 $ 1,022,180 $ 1,022,102 Note payable $ 63,931 $ 63,931 $ 79,611 $ 79,611

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Litigation and Claims In the ordinary course of business, we are a party to various legal proceedings, including, from time to time, actions which are asserted to be maintainable as class action suits. We review these actions on an ongoing basis to determine whether it is probable and estimable that a loss has occurred and use that information when making accrual and disclosure decisions. We have provided reserves where necessary for all claims and, based on current knowledge and in part upon the advice of legal counsel, all matters are believed to be adequately covered by insurance, or, if not covered, we do not expect the outcome in any legal proceedings, individually or collectively, to have a material adverse impact on our financial condition or results of operations. The third and final performance period under an earn-out provision for the acquisition of our tax refund processing business ended on June 30, 2017. We believed that our tax refund processing business did not achieve its earn-out performance target for the fiscal year performance period based on the provisions of the contract and therefore, the total potential payout of $26 million had not been accrued in any period subsequent to June 30, 2017. We were in the process of resolving the final earn-out calculation with the selling shareholders with the assistance of a neutral third party pursuant to the terms of the contract. Prior to the final outcome of that process, we and the sellers mutually agreed to a payment of $13.5 million . This payment amount has been accrued in our consolidated balance sheet as of September 30, 2018 and reflected as a component of other general and administrative expenses on our consolidated income statement for the three and nine months ended September 30, 2018. This amount was subsequently paid in October of 2018. During the quarter ended June 30, 2016, we were in the process of our planned conversion of customer files from our legacy third-party card processor to our current third-party card processor. As part of the conversion process, a small percentage of our active account holders experienced limited disruptions in service, which resulted in two putative class action complaints filed during the second quarter of 2016. We previously recorded an accrual of approximately $2.3 million , which represented our portion of the estimated total settlement amount, all of which our insurance carrier agreed to reimburse us. As of September 30, 2018 , substantially all payments have been made to members of the class for open claims and the matter is considered resolved. Other Matters We monitor the laws of all 50 states to identify state laws or regulations that apply (or may apply) to our products and services. We have obtained money transmitter licenses (or similar such licenses) where applicable, based on advice of counsel or when we have been requested to do so. If we were found to be in violation of any laws and regulations governing banking, money transmitters, electronic fund transfers, or money laundering in the United States or abroad, we could be subject to penalties or could be forced to change our business practices. From time to time we enter into contracts containing provisions that contingently require us to indemnify various parties against claims from third parties. These contracts primarily relate to: (i) contracts with our card issuing banks, under which we are responsible to them for any unrecovered overdrafts on cardholders’ accounts; (ii) certain real estate leases, under which we may be required to indemnify property owners for environmental and other liabilities, and other claims arising from our use of the premises; (iii) certain agreements with our officers, directors, and employees, under which we may be required to indemnify these persons for liabilities arising out of their relationship with us; and (iv) contracts under which we may be required to indemnify our retail distributors, suppliers, vendors and other parties with whom we have contracts against claims arising from certain of our actions, omissions, violations of law and/or infringement of patents, trademarks, copyrights and/or other intellectual property rights. Generally, a maximum obligation under these contracts is not explicitly stated. Because the obligated amounts associated with these types of agreements are not explicitly stated, the overall maximum amount of the obligation cannot be reasonably estimated. With the exception of overdrafts on cardholders’ accounts, historically, we have not been required to make payments under these and similar contingent obligations, and no liabilities have been recorded for these obligations in our consolidated balance sheets. For additional information regarding overdrafts on cardholders’ accounts, refer to Note 6 — Accounts Receivable . As of September 30, 2018 and December 31, 2017 , we had restricted cash balances of $0.6 million and $90.9 million , which consist principally of funds required to collateralize a prefunding obligation with a business partner.

Significant Retailer Concentrat

Significant Retailer Concentrations	9 Months Ended
	Sep. 30, 2018
Risks and Uncertainties [Abstract]
Significant Retailer Concentrations	Significant Retailer Concentration A credit concentration may exist if customers are involved in similar industries, economic sectors, and geographic regions. Our retail distributors operate in similar economic sectors but diverse domestic geographic regions. The loss of a significant retail distributor could have a material adverse effect upon our card sales, profitability, and revenue growth. Revenues derived from our products sold at retail distributors constituting greater than 10% of our total operating revenues were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Walmart 38% 41% 36% 39% Settlement assets derived from our products sold at retail distributors constituting greater than 10% of the settlement assets outstanding on our consolidated balance sheets were as follows: September 30, 2018 December 31, 2017 Walmart 21% 33%

Segment Information

Segment Information	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Segment Information	Segment Information Our operations are comprised of two reportable segments: 1) Account Services and 2) Processing and Settlement Services. We identified our reportable segments based on factors such as how we manage our operations and how our chief operating decision maker views results. Our chief operating decision maker organizes and manages our business primarily on the basis of product and service offerings and uses operating income to assess profitability. The Account Services segment consists of revenues and expenses derived from our deposit account programs, such as prepaid cards, debit cards, consumer and small business checking accounts, secured credit cards, payroll debit cards and gift cards. These deposit account programs are marketed under several of our leading consumer brand names and under the brand names of our Banking as a Service, or "BaaS," partners. The Processing and Settlement Services segment consists of revenues and expenses derived from our products and services that specialize in facilitating the movement of cash on behalf of consumers and businesses, such as consumer cash processing services, wage disbursements and tax refund processing services. The Corporate and Other segment primarily consists of eliminations of intersegment revenues and expenses, unallocated corporate expenses, depreciation and amortization, and other costs that are not considered when management evaluates segment performance. We do not evaluate performance or allocate resources based on segment asset data, and therefore such information is not presented. The following tables present certain financial information for each of our reportable segments for the periods then ended: Three Months Ended September 30, 2018 Account Services Processing and Settlement Services Corporate and Other Total (In thousands) Operating revenues $ 193,763 $ 44,150 $ (7,336 ) $ 230,577 Operating expenses 149,876 42,923 42,863 235,662 Operating income (loss) $ 43,887 $ 1,227 $ (50,199 ) $ (5,085 ) Three Months Ended September 30, 2017 Account Services Processing and Settlement Services Corporate and Other Total (In thousands) Operating revenues $ 170,160 $ 39,088 $ (7,635 ) $ 201,613 Operating expenses 135,693 39,606 13,262 188,561 Operating income $ 34,467 $ (518 ) $ (20,897 ) $ 13,052 Note 18—Segment Information (continued) Nine Months Ended September 30, 2018 Account Services Processing and Settlement Services Corporate and Other Total (In thousands) Operating revenues $ 620,462 $ 207,914 $ (24,452 ) $ 803,924 Operating expenses 485,112 136,445 83,891 705,448 Operating income $ 135,350 $ 71,469 $ (108,343 ) $ 98,476 Nine Months Ended September 30, 2017 Account Services Processing and Settlement Services Corporate and Other Total (In thousands) Operating revenues $ 512,967 $ 187,862 $ (23,667 ) $ 677,162 Operating expenses 403,906 123,287 55,350 582,543 Operating income $ 109,061 $ 64,575 $ (79,017 ) $ 94,619

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Basis of presentation	Basis of Presentation The accompanying unaudited consolidated financial statements are prepared in accordance with generally accepted accounting principles in the United States of America, or GAAP. We consolidated our wholly-owned subsidiaries and eliminated all significant intercompany balances and transactions. We have also prepared the accompanying unaudited consolidated financial statements in conformity with the instructions to Form 10-Q and Article 10 of Regulation S-X and, consequently, they do not include all of the annual disclosures required by GAAP. Reference is made to our Annual Report on Form 10-K for the year ended December 31, 2017 for additional disclosures, including a summary of our significant accounting policies. There have been no material changes to our significant accounting policies during the nine months ended September 30, 2018 , other than the adoption of the accounting pronouncements discussed below. In our opinion, the accompanying unaudited consolidated financial statements contain all adjustments, consisting of normal and recurring items, except as otherwise noted, necessary for the fair presentation of our financial position, results of operations and cash flows for the interim periods presented.
Recent accounting pronouncements	Recent Accounting Pronouncements Recently issued accounting pronouncements not yet adopted In August 2018, the FASB issued ASU No. 2018-15, Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract ("ASU 2018-15") , which amends ASC 350-40 to address implementation costs incurred in a cloud computing arrangement (CCA) that is a service contract. ASU 2018-15 aligns the accounting for costs incurred to implement a CCA that is a service arrangement with the guidance on capitalizing costs associated with developing or obtaining internal-use software. As a result, certain implementation costs incurred by companies under hosting arrangements will be deferred and amortized. ASU 2018-15 is effective for fiscal years beginning after December 15, 2019, and interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact of the pronouncement on our consolidated financial statements. In January 2017, the FASB issued ASU No. 2017-04, Intangibles - Goodwill and Other ("ASU 2017-04") : Simplifying the Test for Goodwill Impairment , which simplifies the existing two-step guidance for goodwill impairment testing by eliminating the second s tep resulting in a write-down to goodwill equal to the initial amount of impairment determined in step one. The ASU is to be applied prospectively for reporting periods beginning after December 15, 2019. Early adoption is permitted for interim or annual goodwill impairment tests performed after January 1, 2017. We are currently evaluating the impact of the provisions of ASU 2017-04 on our consolidated financial statements; however, we do not anticipate it will have a material impact upon adoption. Note 2—Summary of Significant Accounting Policies (continued) In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments ("ASU 2016-13") that requires financial assets measured at amortized cost be presented at the net amount expected to be collected. Credit losses on available-for-sale debt securities should be recorded through an allowance for credit losses limited by the amount that the fair value is less than amortized cost. ASU 2016-13 is effective for fiscal years beginning after December 15, 2019, including interim periods within those fiscal years. Early adoption is permitted. We are currently evaluating the impact of ASU 2016-13 on our consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842) ("ASU 2016-02") in order to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet for those leases classified as operating leases under previous GAAP. The guidance has been modified through additional technical corrections since its original issuance, including optional transition relief as provided for under ASU No. 2018-11- Leases (Topic 842): Targeted Improvements . ASU 2016-02 requires that a lessee should recognize a liability to make lease payments and a right-of-use asset representing its right to use the underlying asset for leases with a term greater than 12 months. ASU 2016-02 is effective for fiscal years beginning after December 15, 2018, including interim periods within those periods and early adoption is permitted. We are currently assessing the impact of the adoption of this principle on our consolidated financial statements. We have reviewed the requirements under the new standard, and are in the process of quantifying its effect on our consolidated financial statements upon adoption and assessing its impact on our related disclosures or our internal controls over financial reporting. We anticipate adopting this ASU on January 1, 2019 on a prospective basis with a cumulative effect adjustment to retained earnings, if any, upon adoption. Recently adopted accounting pronouncements In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers (Topic 606) ("ASU 2014-09"), and has been modified through additional technical corrections since its original issuance (collectively ASC 606). ASU 2014-09 supersedes nearly all existing revenue recognition guidance under current GAAP. The core principle of ASU 2014-09 is to recognize revenues when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. The standard defines a five step process to achieve this core principle and, in doing so, more judgment and estimates may be required within the revenue recognition process than are required under previous GAAP. The standard allows companies to apply either a full retrospective approach, which requires applying the standard to each prior year reporting period presented, or a modified retrospective approach with a cumulative effect adjustment recognized upon adoption. We adopted the provisions of the standard on January 1, 2018 using the modified retrospective approach, which did not result in any cumulative adjustment to opening retained earnings nor did it have a material impact on our consolidated financial statements. The adoption of ASU 2014-09, however, requires expanded disclosures under the new guidance. See Note 3 - Revenues for further information and additional discussion around changes identified to our policies under the new accounting pronouncement. In January 2016, the FASB issued ASU No. 2016-01, Financial Instruments – Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities ("ASU 2016-01"). ASU 2016-01 revises the classification and measurement of investments in certain equity investments and the presentation of certain fair value changes for certain financial liabilities measured at fair value. ASU 2016-01 requires the change in fair value of many equity investments to be recognized in net income. We adopted the provisions of ASU 2016-01 on January 1, 2018, the result of which did not have any impact upon our consolidated financial statements. In November 2016, the FASB issued ASU No. 2016-18, Restricted Cash ("ASU 2016-18"), to require that restricted cash and restricted cash equivalents be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total cash amounts shown on the statement of cash flows. Consequently, transfers between cash and restricted cash will not be presented as a separate line item in the operating, investing or financing sections of the cash flow statement. The amendments should be applied retrospectively to each period presented. We adopted the provisions of ASU 2016-18 on January 1, 2018, the effect of which resulted in an immaterial reclassification in presentation on our statement of cash flows and had no effect on our consolidated financial results. Note 2—Summary of Significant Accounting Policies (continued) In February 2018, the FASB issued ASU No. 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income ("ASU 2018-02"). Under existing U.S. GAAP, the effects of changes in tax rates and laws on deferred tax balances are recorded as a component of income tax expense in the period in which the law was enacted. When deferred tax balances related to items originally recorded in accumulated other comprehensive income are adjusted, certain tax effects become stranded in accumulated other comprehensive income. The amendments in ASU 2018-02 allow a reclassification from accumulated other comprehensive income to retained earnings for stranded tax effects resulting from the 2017 Tax Cuts and Jobs Act. The amendments in this ASU also require certain disclosures about stranded tax effects. We adopted the provisions of ASU 2018-02 as of December 31, 2017, the result of which did not have a material impact upon our consolidated financial statements.
Fair value of financial instruments	Short-term Financial Instruments Our short-term financial instruments consist principally of unrestricted and restricted cash and cash equivalents, settlement assets and obligations, and obligations to customers . These financial instruments are short-term in nature, and, accordingly, we believe their carrying amounts approximate their fair values. Under the fair value hierarchy, these instruments are classified as Level 1. Investment Securities The fair values of investment securities have been derived using methodologies referenced in Note 2–Summary of Significant Accounting Policies to the Consolidated Financial Statements of our Annual Report on Form 10-K for the year ended December 31, 2017 . Under the fair value hierarchy, our investment securities are classified as Level 2. Loans We determined the fair values of loans by discounting both principal and interest cash flows expected to be collected using a discount rate commensurate with the risk that we believe a market participant would consider in determining fair value. Under the fair value hierarchy, our loans are classified as Level 3. Deposits The fair value of demand and interest checking deposits and savings deposits is the amount payable on demand at the reporting date. We determined the fair value of time deposits by discounting expected future cash flows using market-derived rates based on our market yields on certificates of deposit, by maturity, at the measurement date. Under the fair value hierarchy, our deposits are classified as Level 2. Contingent Consideration The fair value of contingent consideration obligations, such as the earn-outs associated with our acquisitions of TPG and UniRush, are estimated through valuation models designed to estimate the probability of such contingent payments based on various assumptions. Estimated payments are discounted using present value techniques to arrive at an estimated fair value. Our contingent consideration payable is classified as Level 3 because we use unobservable inputs to estimate fair value, including the probability of achieving certain earnings thresholds and appropriate discount rates. Changes in fair value of contingent consideration are recorded through operating expenses. Note Payable The fair value of our note payable is based on borrowing rates currently available to a market participant for loans with similar terms or maturity. The carrying amount of our note payable approximates fair value because the base interest rate charged varies with market conditions and the credit spread is commensurate with current market spreads for issuers of similar risk. The fair value of the note payable is classified as a Level 2 liability in the fair value hierarchy.

Revenues (Tables)

Revenues (Tables)	9 Months Ended
	Sep. 30, 2018
Revenue from Contract with Customer [Abstract]
Schedule of disaggregation of revenue	The following table disaggregates our revenues by the timing in which the revenue is recognized: Three Months Ended September 30, 2018 Nine Months Ended September 30, 2018 Account Services Processing and Settlement Services Account Services Processing and Settlement Services Timing of revenue recognition (In thousands) Transferred at a point in time $ 120,427 $ 43,040 $ 381,738 $ 203,888 Transferred over time 66,196 914 215,612 2,686 Operating revenues $ 186,623 $ 43,954 $ 597,350 $ 206,574

Business Combination (Tables)

Business Combination (Tables)	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Schedule of fair value of consideration transferred - UniRush	The following table summarizes the fair value of consideration transferred: Consideration (In thousands) Cash, including proceeds from notes payable $ 142,154 Fair value of contingent consideration 21,500 Total consideration $ 163,654
Schedule of assets acquired and liabilities assumed - UniRush	The allocation of the purchase price was as follows: February 28, 2017 (In thousands) Assets: Cash and cash equivalents $ 656 Accounts receivable, net 5,745 Prepaid expenses and other assets 5,146 Property and equipment, net 4,233 Intangible assets 69,000 Goodwill 93,435 Total assets: 178,215 Liabilities: Accounts payable 10,861 Other liabilities 3,700 Total liabilities: 14,561 Net assets acquired $ 163,654
Schedule of pro forma information - UniRush	The pro forma results for the nine months ended September 30, 2017 have been presented for comparative purposes only and are not indicative of what would have occurred had the UniRush acquisition been made as of January 1, 2016, or of any potential results which may occur in the future. Nine Months Ended September 30, 2018 2017 (In thousands, except per share data) (Pro forma) Net revenues $ 803,924 $ 696,447 Net income attributable to common stock $ 104,431 $ 66,026 Basic earnings per common share $ 2.01 $ 1.31 Diluted earnings per common share $ 1.92 $ 1.25 Basic weighted-average common shares issued and outstanding 52,046 50,330 Diluted weighted-average common shares issued and outstanding 54,437 52,788

Investment Securities (Tables)

Investment Securities (Tables)	9 Months Ended
	Sep. 30, 2018
Investments, Debt and Equity Securities [Abstract]
Schedule of available-for-sale investment securities	Our available-for-sale investment securities were as follows: Amortized cost Gross unrealized gains Gross unrealized losses Fair value (In thousands) September 30, 2018 Negotiable certificate of deposit $ 15,000 $ — $ — $ 15,000 Agency bond securities 19,712 — (128 ) 19,584 Agency mortgage-backed securities 114,158 43 (1,730 ) 112,471 Municipal bonds 507 — (30 ) 477 Asset-backed securities 76,452 2 (109 ) 76,345 Total investment securities $ 225,829 $ 45 $ (1,997 ) $ 223,877 December 31, 2017 Corporate bonds $ 1,000 $ — $ — $ 1,000 U.S. Treasury notes 10,921 — (46 ) 10,875 Agency mortgage-backed securities 121,037 52 (1,055 ) 120,034 Municipal bonds 742 4 (7 ) 739 Asset-backed securities 20,952 — (91 ) 20,861 Total investment securities $ 154,652 $ 56 $ (1,199 ) $ 153,509 Note 5—Investment Securities (continued) As of September 30, 2018 and December 31, 2017 , the gross unrealized losses and fair values of available-for-sale investment securities that were in unrealized loss positions were as follows: Less than 12 months 12 months or more Total fair value Total unrealized loss Fair value Unrealized loss Fair value Unrealized loss (In thousands) September 30, 2018 Agency bond securities $ 19,584 $ (128 ) $ — $ — $ 19,584 $ (128 ) Agency mortgage-backed securities 32,282 (328 ) 65,414 (1,402 ) 97,696 (1,730 ) Municipal bonds 346 (21 ) 131 (9 ) 477 (30 ) Asset-backed securities 55,665 (65 ) 9,259 (44 ) 64,924 (109 ) Total investment securities $ 107,877 $ (542 ) $ 74,804 $ (1,455 ) $ 182,681 $ (1,997 ) December 31, 2017 U.S. Treasury notes $ 4,588 $ (21 ) $ 6,288 $ (25 ) $ 10,876 $ (46 ) Agency mortgage-backed securities 62,683 (453 ) 44,159 (602 ) 106,842 (1,055 ) Municipal bonds — — 193 (7 ) 193 (7 ) Asset-backed securities 2,134 (2 ) 18,727 (89 ) 20,861 (91 ) Total investment securities $ 69,405 $ (476 ) $ 69,367 $ (723 ) $ 138,772 $ (1,199 )
Schedule of maturity dates for available-for-sale investment securities	As of September 30, 2018 , the contractual maturities of our available-for-sale investment securities were as follows: Amortized cost Fair value (In thousands) Due in one year or less $ 14,962 $ 14,946 Due after one year through five years 19,750 19,638 Due after five years through ten years — — Due after ten years 507 477 Mortgage and asset-backed securities 190,610 188,816 Total investment securities $ 225,829 $ 223,877

Accounts Receivable (Tables)

Accounts Receivable (Tables)	9 Months Ended
	Sep. 30, 2018
Receivables [Abstract]
Schedule of accounts receivable	Accounts receivable, net consisted of the following: September 30, 2018 December 31, 2017 (In thousands) Overdrawn account balances due from cardholders $ 21,033 $ 17,856 Reserve for uncollectible overdrawn accounts (16,280 ) (14,471 ) Net overdrawn account balances due from cardholders 4,753 3,385 Trade receivables 8,359 4,231 Reserve for uncollectible trade receivables (1,101 ) (3 ) Net trade receivables 7,258 4,228 Receivables due from card issuing banks 6,779 6,309 Fee advances 3,010 16,194 Other receivables 5,605 5,161 Accounts receivable, net $ 27,405 $ 35,277 Activity in the reserve for uncollectible overdrawn accounts consisted of the following: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands) Balance, beginning of period $ 17,087 $ 13,619 $ 14,471 $ 11,932 Provision for uncollectible overdrawn accounts: Fees 17,404 19,124 53,536 53,393 Purchase transactions 4,137 1,943 9,822 5,112 Charge-offs (22,348 ) (19,299 ) (61,549 ) (55,050 ) Balance, end of period $ 16,280 $ 15,387 $ 16,280 $ 15,387

Loans to Bank Customers (Tables

Loans to Bank Customers (Tables)	9 Months Ended
	Sep. 30, 2018
Loans and Leases Receivable Disclosure [Abstract]
Schedule of past due financing receivables	The following table presents the carrying value, gross of the related allowance for loan losses, of our nonperforming loans. See Note 2 — Summary of Significant Accounting Policies to the Consolidated Financial Statements of our Annual Report on Form 10-K for the year ended December 31, 2017 for further information on the criteria for classification as nonperforming. September 30, 2018 December 31, 2017 (In thousands) Residential $ 422 $ 502 Installment 175 191 Total loans $ 597 $ 693 The following table presents total outstanding loans, gross of the related allowance for loan losses, and a summary of the related payment status: 30-59 Days Past Due 60-89 Days Past Due 90 Days or More Past Due Total Past Due Total Current or Less Than 30 Days Past Due Total Outstanding (In thousands) September 30, 2018 Residential $ — $ — $ 9 $ 9 $ 3,786 $ 3,795 Commercial 8 — — 8 172 180 Installment 11 2 — 13 996 1,009 Secured credit card 1,582 1,505 1,104 4,191 14,076 18,267 Total loans $ 1,601 $ 1,507 $ 1,113 $ 4,221 $ 19,030 $ 23,251 Percentage of outstanding 6.9 % 6.5 % 4.8 % 18.2 % 81.8 % 100.0 % December 31, 2017 Residential $ — $ — $ — $ — $ 3,554 $ 3,554 Commercial — — — — 315 315 Installment 1 — — 1 1,378 1,379 Secured credit card 1,223 593 424 2,240 11,373 13,613 Total loans $ 1,224 $ 593 $ 424 $ 2,241 $ 16,620 $ 18,861 Percentage of outstanding 6.5 % 3.1 % 2.3 % 11.9 % 88.1 % 100.0 %
Schedule of credit quality indicators related to loan portfolio	The table below presents the carrying value, gross of the related allowance for loan losses, of our loans within the primary credit quality indicators related to our loan portfolio: September 30, 2018 December 31, 2017 Non-Classified Classified Non-Classified Classified (In thousands) Residential $ 3,373 $ 422 $ 3,038 $ 516 Commercial 180 — 315 — Installment 665 344 1,059 320 Secured credit card 18,267 — 13,613 — Total loans $ 22,485 $ 766 $ 18,025 $ 836
Schedule of troubled debt restructurings	The following table presents our impaired loans and loans that we modified as TDRs as of September 30, 2018 and December 31, 2017 : September 30, 2018 December 31, 2017 Unpaid Principal Balance Carrying Value Unpaid Principal Balance Carrying Value (In thousands) Residential $ 422 $ 344 $ 516 $ 452 Installment 209 60 262 120
Schedule of allowance for loan losses	Activity in the allowance for loan losses consisted of the following: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands) Balance, beginning of period $ 1,173 $ 319 $ 291 $ 277 Provision for loans 1,036 72 2,270 135 Loans charged off (964 ) (158 ) (1,598 ) (189 ) Recoveries of loans previously charged off 89 4 371 14 Balance, end of period $ 1,334 $ 237 $ 1,334 $ 237

Employee Stock-Based Compensa_2

Employee Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 2018
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of stock options and restricted stock units activity	The following table summarizes restricted stock units with only service conditions granted under our 2010 Equity Incentive Plan: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands, except per share data) Restricted stock units granted 105 106 288 301 Weighted-average grant-date fair value $ 79.71 $ 47.19 $ 71.74 $ 36.86
Performance based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Schedule of stock options and restricted stock units activity	The following table summarizes the performance-based restricted stock units granted under our 2010 Equity Incentive Plan: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands, except per share data) Performance based restricted stock units granted (1) — 1 612 616 Weighted-average grant-date fair value $ — $ 46.28 $ 49.04 $ 36.02 (1 ) Performance awards granted also reflects the impact of any incremental shares awarded during the periods ended for performance periods completed. The grant date fair value for these awards are based on the grant price at the time of the initial award.

Deposits (Tables)

Deposits (Tables)	9 Months Ended
	Sep. 30, 2018
Deposits [Abstract]
Schedule of deposits	Deposits are categorized as non-interest or interest-bearing deposits as follows: September 30, 2018 December 31, 2017 (In thousands) Non-interest bearing deposit accounts GPR deposits $ 778,753 $ 803,549 Other demand deposits 90,981 61,264 Total non-interest bearing deposit accounts 869,734 864,813 Interest-bearing deposit accounts Checking accounts 114,628 140,555 Savings 9,465 10,523 GPR deposits 7,198 — Time deposits, denominations greater than or equal to $100 3,914 4,752 Time deposits, denominations less than $100 1,263 1,537 Total interest-bearing deposit accounts 136,468 157,367 Total deposits $ 1,006,202 $ 1,022,180
Schedule of maturities for total time deposits	The scheduled contractual maturities for total time deposits are presented in the table below: September 30, 2018 (In thousands) Due in 2018 $ 569 Due in 2019 1,267 Due in 2020 1,380 Due in 2021 835 Due in 2022 790 Thereafter 336 Total time deposits $ 5,177

Note Payable (Tables)

Note Payable (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Schedule of outstanding debt	As of September 30, 2018 and December 31, 2017 , our outstanding debt, net of deferred financing costs of $1.7 million and $2.9 million , respectively, consisted of the following: September 30, 2018 December 31, 2017 (In thousands) Term facility $ 63,931 $ 79,611 Revolving facility — — Total notes payable $ 63,931 $ 79,611

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Schedule of federal tax rate and actual income tax expense reconciliation	The sources and tax effects of the differences are as follows: Nine Months Ended September 30, 2018 2017 U.S. federal statutory tax rate 21.0 % 35.0 % State income taxes, net of federal tax benefit (0.1 ) (0.5 ) General business credits (1.4 ) (3.0 ) Employee stock-based compensation (16.1 ) (8.2 ) IRC 162(m) limitation 2.7 1.7 Other 0.2 (0.3 ) Effective tax rate 6.3 % 24.7 %
Schedule of income tax contingencies	The reconciliation of the beginning unrecognized tax benefits balance to the ending balance is as follows: Nine Months Ended September 30, 2018 2017 (In thousands) Beginning balance $ 5,560 $ 7,314 Increases related to positions taken during prior years 470 404 Increases related to positions taken during the current year 1,170 1,119 Decreases related to positions settled with tax authorities — (1,189 ) Decreases as a result of a lapse of applicable statute of limitations (664 ) (1,392 ) Ending balance $ 6,536 $ 6,256 The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate $ 6,536 $ 6,256

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2018
Stockholders' Equity Note [Abstract]
Schedule of ASR activity	The following table summarizes our ASR activity for the prior year comparative period: Purchase Period End Date Number of Shares (In thousands) Average Repurchase Price Per Share ASR Amount (In thousands) March 2017 ASR November 2017 1,326 $ 38.64 $ 50,000 (1) (1) We elected to cash settle approximately $2.0 million worth of shares owed back to the counterparty under our March 2017 accelerated share repurchase agreement.

Earnings per Common Share (Tabl

Earnings per Common Share (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Schedule of basic and diluted EPS	The calculation of basic and diluted EPS was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands, except per share data) Basic earnings per Class A common share Numerator: Net income $ 4,573 $ 13,639 $ 104,431 $ 73,659 Denominator: Weighted-average Class A shares issued and outstanding 52,580 50,519 52,046 50,330 Basic earnings per Class A common share $ 0.09 $ 0.27 $ 2.01 $ 1.46 Diluted earnings per Class A common share Numerator: Net income $ 4,573 $ 13,639 $ 104,431 $ 73,659 Denominator: Weighted-average Class A shares issued and outstanding 52,580 50,519 52,046 50,330 Dilutive potential common shares: Stock options 214 790 372 764 Restricted stock units 1,032 1,292 1,223 1,404 Performance based restricted stock units 780 306 791 282 Employee stock purchase plan 9 16 5 8 Diluted weighted-average Class A shares issued and outstanding 54,615 52,923 54,437 52,788 Diluted earnings per Class A common share $ 0.08 $ 0.26 $ 1.92 $ 1.40
Schedule of antidilutive shares	The following table shows the weighted-average number of shares excluded from the diluted EPS calculation: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands) Class A common stock Options to purchase Class A common stock — 56 — 9 Performance based restricted stock units 223 539 123 301 Total options and restricted stock units 223 595 123 310

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Schedule of assets and liabilities carried at fair value	As of September 30, 2018 and December 31, 2017 , our assets and liabilities carried at fair value on a recurring basis were as follows: Level 1 Level 2 Level 3 Total Fair Value September 30, 2018 (In thousands) Assets Negotiable certificate of deposit $ — $ 15,000 $ — $ 15,000 Agency bond securities — 19,584 — 19,584 Agency mortgage-backed securities — 112,471 — 112,471 Municipal bonds — 477 — 477 Asset-backed securities — 76,345 — 76,345 Total assets $ — $ 223,877 $ — $ 223,877 Liabilities Contingent consideration $ — $ — $ 13,502 $ 13,502 December 31, 2017 Assets Corporate bonds $ — $ 1,000 $ — $ 1,000 U.S. Treasury notes — 10,875 — 10,875 Agency mortgage-backed securities — 120,034 — 120,034 Municipal bonds — 739 — 739 Asset-backed securities — 20,861 — 20,861 Total assets $ — $ 153,509 $ — $ 153,509 Liabilities Contingent consideration $ — $ — $ 17,358 $ 17,358
Schedule of changes in contingent consideration payable	The following table presents changes in our contingent consideration payable for the three and nine months ended September 30, 2018 and 2017 , which is categorized in Level 3 of the fair value hierarchy: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (In thousands) Balance, beginning of period $ 14,664 $ 21,911 $ 17,358 $ 8,634 Issuance — — — 18,000 Payments of contingent consideration (1,162 ) (1,184 ) (3,856 ) (1,907 ) Purchase accounting adjustment — — — 3,500 Change in fair value of contingent consideration — — — (7,500 ) Balance, end of period $ 13,502 $ 20,727 $ 13,502 $ 20,727

Fair Value of Financial Instr_2

Fair Value of Financial Instruments (Tables)	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Schedule of assets not carried at fair value	The carrying values and fair values of certain financial instruments that were not carried at fair value, excluding short-term financial instruments for which the carrying value approximates fair value, at September 30, 2018 and December 31, 2017 are presented in the table below. September 30, 2018 December 31, 2017 Carrying Value Fair Value Carrying Value Fair Value (In thousands) Financial Assets Loans to bank customers, net of allowance $ 21,917 $ 21,270 $ 18,570 $ 18,102 Financial Liabilities Deposits $ 1,006,202 $ 1,006,146 $ 1,022,180 $ 1,022,102 Note payable $ 63,931 $ 63,931 $ 79,611 $ 79,611

Significant Retailer Concentr_2

Significant Retailer Concentrations (Tables)	9 Months Ended
	Sep. 30, 2018
Risks and Uncertainties [Abstract]
Schedule of customer concentrations	Revenues derived from our products sold at retail distributors constituting greater than 10% of our total operating revenues were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Walmart 38% 41% 36% 39% Settlement assets derived from our products sold at retail distributors constituting greater than 10% of the settlement assets outstanding on our consolidated balance sheets were as follows: September 30, 2018 December 31, 2017 Walmart 21% 33%

Segment Information (Tables)

Segment Information (Tables)	9 Months Ended
	Sep. 30, 2018
Segment Reporting [Abstract]
Schedule of segment reporting	The following tables present certain financial information for each of our reportable segments for the periods then ended: Three Months Ended September 30, 2018 Account Services Processing and Settlement Services Corporate and Other Total (In thousands) Operating revenues $ 193,763 $ 44,150 $ (7,336 ) $ 230,577 Operating expenses 149,876 42,923 42,863 235,662 Operating income (loss) $ 43,887 $ 1,227 $ (50,199 ) $ (5,085 ) Three Months Ended September 30, 2017 Account Services Processing and Settlement Services Corporate and Other Total (In thousands) Operating revenues $ 170,160 $ 39,088 $ (7,635 ) $ 201,613 Operating expenses 135,693 39,606 13,262 188,561 Operating income $ 34,467 $ (518 ) $ (20,897 ) $ 13,052 Note 18—Segment Information (continued) Nine Months Ended September 30, 2018 Account Services Processing and Settlement Services Corporate and Other Total (In thousands) Operating revenues $ 620,462 $ 207,914 $ (24,452 ) $ 803,924 Operating expenses 485,112 136,445 83,891 705,448 Operating income $ 135,350 $ 71,469 $ (108,343 ) $ 98,476 Nine Months Ended September 30, 2017 Account Services Processing and Settlement Services Corporate and Other Total (In thousands) Operating revenues $ 512,967 $ 187,862 $ (23,667 ) $ 677,162 Operating expenses 403,906 123,287 55,350 582,543 Operating income $ 109,061 $ 64,575 $ (79,017 ) $ 94,619

Organization (Details)

Organization (Details)	9 Months Ended
	Sep. 30, 2018customerstore
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of stores (in stores) | store	100,000
Number of customers served (more than) (in customers) | customer	25,000

Revenues (Details)

Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Incentive payments	$ 1,800	$ 1,300	$ 5,300	$ 3,600
GPR, average useful life			5 months
Gift Card, average useful life			6 months
Operating revenues	230,577	$ 201,613	$ 803,924	$ 677,162
Deferred revenue, revenue recognized	100		28,500
Account Services
Disaggregation of Revenue [Line Items]
Operating revenues	186,623		597,350
Account Services | Transferred at a point in time
Disaggregation of Revenue [Line Items]
Operating revenues	120,427		381,738
Account Services | Transferred over time
Disaggregation of Revenue [Line Items]
Operating revenues	66,196		215,612
Processing and Settlement Services
Disaggregation of Revenue [Line Items]
Operating revenues	43,954		206,574
Processing and Settlement Services | Transferred at a point in time
Disaggregation of Revenue [Line Items]
Operating revenues	43,040		203,888
Processing and Settlement Services | Transferred over time
Disaggregation of Revenue [Line Items]
Operating revenues	$ 914		$ 2,686

Business Combination - Narrativ

Business Combination - Narrative (Details) - USD ($) $ in Thousands	Feb. 28, 2017	Sep. 30, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Note payable, carrying value		$ 63,931	$ 79,611
UniRush, LLC
Business Acquisition [Line Items]
Business combination, consideration transferred	$ 163,654
Cash, including proceeds from notes payable	142,154
Contingent consideration, earn-out payable	$ 20,000
Contingent consideration, earn-out period	5 years
Goodwill	$ 93,435
UniRush, LLC | Customer relationships
Business Acquisition [Line Items]
Finite-lived intangibles	$ 58,500
UniRush, LLC | Customer relationships | Minimum
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	5 years
UniRush, LLC | Customer relationships | Maximum
Business Acquisition [Line Items]
Acquired finite-lived intangible assets, weighted average useful life	10 years
UniRush, LLC | Trade names
Business Acquisition [Line Items]
Finite-lived intangibles	$ 5,500
Acquired finite-lived intangible assets, weighted average useful life	15 years
UniRush, LLC | Subordinated debt
Business Acquisition [Line Items]
Cash raised from debt	$ 20,000
UniRush, LLC | Revolving facility | Line of credit
Business Acquisition [Line Items]
Note payable, carrying value	$ 95,000

Business Combination - Purchase

Business Combination - Purchase Price (Details) - UniRush, LLC $ in Thousands	Feb. 28, 2017USD ($)
Business Combination, Consideration Transferred [Abstract]
Cash, including proceeds from notes payable	$ 142,154
Fair value of contingent consideration	21,500
Total consideration	163,654
Assets:
Cash and cash equivalents	656
Accounts receivable, net	5,745
Prepaid expenses and other assets	5,146
Property and equipment, net	4,233
Intangible assets	69,000
Goodwill	93,435
Total assets:	178,215
Liabilities:
Accounts payable	10,861
Other liabilities	3,700
Total liabilities:	14,561
Net assets acquired	$ 163,654

Business Combination - Pro Form

Business Combination - Pro Forma (Details) - UniRush, LLC - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Net revenues	$ 803,924	$ 696,447
Net income attributable to common stock	$ 104,431	$ 66,026
Basic earnings per common share (in usd per share)	$ 2.01	$ 1.31
Diluted earnings per common share (in usd per share)	$ 1.92	$ 1.25
Basic weighted-average common shares issued and outstanding (in shares)	52,046	50,330
Diluted weighted-average common shares issued and outstanding (in shares)	54,437	52,788

Investment Securities - Gross G

Investment Securities - Gross Gains and Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 225,829	$ 154,652
Gross unrealized gains	45	56
Gross unrealized losses	(1,997)	(1,199)
Fair value	223,877	153,509
Corporate bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		1,000
Gross unrealized gains		0
Gross unrealized losses		0
Fair value		1,000
U.S. Treasury notes
Schedule of Available-for-sale Securities [Line Items]
Amortized cost		10,921
Gross unrealized gains		0
Gross unrealized losses		(46)
Fair value		10,875
Negotiable certificate of deposit
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	15,000
Gross unrealized gains	0
Gross unrealized losses	0
Fair value	15,000
Agency bond securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	19,712
Gross unrealized gains	0
Gross unrealized losses	(128)
Fair value	19,584
Agency mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	114,158	121,037
Gross unrealized gains	43	52
Gross unrealized losses	(1,730)	(1,055)
Fair value	112,471	120,034
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	507	742
Gross unrealized gains	0	4
Gross unrealized losses	(30)	(7)
Fair value	477	739
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	76,452	20,952
Gross unrealized gains	2	0
Gross unrealized losses	(109)	(91)
Fair value	$ 76,345	$ 20,861

Investment Securities - Continu

Investment Securities - Continuous Unrealized Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	$ 107,877		$ 107,877		$ 69,405
Unrealized loss, less than 12 months	(542)		(542)		(476)
Fair value, 12 months or more	74,804		74,804		69,367
Unrealized loss, 12 months or more	(1,455)		(1,455)		(723)
Total fair value	182,681		182,681		138,772
Total unrealized loss	(1,997)		(1,997)		(1,199)
Other than temporary impairment losses	0	$ 0	0	$ 0
Agency bond securities
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	19,584		19,584
Unrealized loss, less than 12 months	(128)		(128)
Fair value, 12 months or more	0		0
Unrealized loss, 12 months or more	0		0
Total fair value	19,584		19,584
Total unrealized loss	(128)		(128)
Agency mortgage-backed securities
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	32,282		32,282		62,683
Unrealized loss, less than 12 months	(328)		(328)		(453)
Fair value, 12 months or more	65,414		65,414		44,159
Unrealized loss, 12 months or more	(1,402)		(1,402)		(602)
Total fair value	97,696		97,696		106,842
Total unrealized loss	(1,730)		(1,730)		(1,055)
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	346		346		0
Unrealized loss, less than 12 months	(21)		(21)		0
Fair value, 12 months or more	131		131		193
Unrealized loss, 12 months or more	(9)		(9)		(7)
Total fair value	477		477		193
Total unrealized loss	(30)		(30)		(7)
Asset-backed securities
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months	55,665		55,665		2,134
Unrealized loss, less than 12 months	(65)		(65)		(2)
Fair value, 12 months or more	9,259		9,259		18,727
Unrealized loss, 12 months or more	(44)		(44)		(89)
Total fair value	64,924		64,924		20,861
Total unrealized loss	$ (109)		$ (109)		(91)
U.S. Treasury notes
Schedule of Available-for-sale Securities [Line Items]
Fair value, less than 12 months					4,588
Unrealized loss, less than 12 months					(21)
Fair value, 12 months or more					6,288
Unrealized loss, 12 months or more					(25)
Total fair value					10,876
Total unrealized loss					$ (46)

Investment Securities - Maturit

Investment Securities - Maturities (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Amortized cost
Due in one year or less	$ 14,962
Due after one year through five years	19,750
Due after five years through ten years	0
Due after ten years	507
Mortgage and asset-backed securities	190,610
Amortized cost	225,829	$ 154,652
Fair value
Due in one year or less	14,946
Due after one year through five years	19,638
Due after five years through ten years	0
Due after ten years	477
Mortgage and asset-backed securities	188,816
Fair value	$ 223,877	$ 153,509

Accounts Receivable - Accounts

Accounts Receivable - Accounts Receivable (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable current and noncurrent, net	$ 27,405		$ 35,277
Overdrawn account balances due from cardholders
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	21,033		17,856
Reserve for uncollectible overdrawn accounts	(16,280)	$ (17,087)	(14,471)	$ (15,387)	$ (13,619)	$ (11,932)
Accounts receivable current and noncurrent, net	4,753		3,385
Trade receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	8,359		4,231
Reserve for uncollectible overdrawn accounts	(1,101)		(3)
Accounts receivable current and noncurrent, net	7,258		4,228
Receivables due from card issuing banks
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	6,779		6,309
Fee advances
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	3,010		16,194
Other receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	$ 5,605		$ 5,161

Accounts Receivable - Reserve F

Accounts Receivable - Reserve For Uncollectible Overdrawn Accounts (Details) - Overdrawn account balances due from cardholders - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Uncollectible Overdrawn Accounts [Roll Forward]
Balance, beginning of period	$ 17,087	$ 13,619	$ 14,471	$ 11,932
Provision for uncollectible overdrawn accounts:
Fees	17,404	19,124	53,536	53,393
Purchase transactions	4,137	1,943	9,822	5,112
Charge-offs	(22,348)	(19,299)	(61,549)	(55,050)
Balance, end of period	$ 16,280	$ 15,387	$ 16,280	$ 15,387

Loans to Bank Customers - Loan

Loans to Bank Customers - Loan Summary (Details) - USD ($) $ in Thousands	1 Months Ended
	Aug. 31, 2017	Sep. 30, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 4,221	$ 2,241
Total Current or Less Than 30 Days Past Due		19,030	16,620
Total Outstanding		$ 23,251	$ 18,861
Past Due, percentage		18.20%	11.90%
Total Current or Less Than 30 Days Past Due, percentage		81.80%	88.10%
Total Outstanding, percentage		100.00%	100.00%
30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 1,601	$ 1,224
Past Due, percentage		6.90%	6.50%
60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 1,507	$ 593
Past Due, percentage		6.50%	3.10%
90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 1,113	$ 424
Past Due, percentage		4.80%	2.30%
Residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 9	$ 0
Total Current or Less Than 30 Days Past Due		3,786	3,554
Total Outstanding		3,795	3,554
Residential | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Residential | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Residential | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		9	0
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		8	0
Total Current or Less Than 30 Days Past Due		172	315
Total Outstanding		180	315
Commercial | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		8	0
Commercial | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Commercial | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		13	1
Total Current or Less Than 30 Days Past Due		996	1,378
Total Outstanding		1,009	1,379
Installment | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		11	1
Installment | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		2	0
Installment | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		0	0
Secured credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		4,191	2,240
Total Current or Less Than 30 Days Past Due		14,076	11,373
Total Outstanding		18,267	13,613
Secured credit card | 30-59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		1,582	1,223
Secured credit card | 60-89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		1,505	593
Secured credit card | 90 Days or More Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due		$ 1,104	$ 424
Secured credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Outstanding	$ 8,200
Collateral pledged | Secured credit card
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable acquired	$ 8,100

Loans to Bank Customers - Nonpe

Loans to Bank Customers - Nonperforming Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Nonperforming Loans [Line Items]
Nonperforming loans	$ 597	$ 693
Residential
Nonperforming Loans [Line Items]
Nonperforming loans	422	502
Installment
Nonperforming Loans [Line Items]
Nonperforming loans	$ 175	$ 191

Loans to Bank Customers - Credi

Loans to Bank Customers - Credit Quality Indicators (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	$ 21,917	$ 18,570
Non-Classified
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	22,485	18,025
Classified
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	766	836
Residential | Non-Classified
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	3,373	3,038
Residential | Classified
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	422	516
Commercial | Non-Classified
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	180	315
Commercial | Classified
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	0	0
Installment | Non-Classified
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	665	1,059
Installment | Classified
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	344	320
Secured credit card | Non-Classified
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	18,267	13,613
Secured credit card | Classified
Outstanding Loans [Line Items]
Loans to bank customers, carrying amount	$ 0	$ 0

Loans to Bank Customers - Troub

Loans to Bank Customers - Troubled Debt Restructurings (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Residential
Financing Receivable, Impaired [Line Items]
Impaired financing receivable, unpaid principal balance	$ 422	$ 516
Financing receivable, modifications, recorded investment	344	452
Installment
Financing Receivable, Impaired [Line Items]
Impaired financing receivable, unpaid principal balance	209	262
Financing receivable, modifications, recorded investment	$ 60	$ 120

Loans to Bank Customers - Allow

Loans to Bank Customers - Allowance for Loan Losses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Allowance for Loan Losses [Roll Forward]
Balance, beginning of period	$ 1,173	$ 319	$ 291	$ 277
Provision for loans	1,036	72	2,270	135
Loans charged off	(964)	(158)	(1,598)	(189)
Recoveries of loans previously charged off	89	4	371	14
Balance, end of period	$ 1,334	$ 237	$ 1,334	$ 237

Employee Stock-Based Compensa_3

Employee Stock-Based Compensation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee stock-based compensation	$ 16.8	$ 11	$ 37.4	$ 27.4
2010 Equity Incentive Plan | Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted (in shares)	105	106	288	301
Weighted-average grant-date fair value (in usd per share)	$ 79.71	$ 47.19	$ 71.74	$ 36.86
2010 Equity Incentive Plan | Performance based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant-date fair value (in usd per share)	$ 0	$ 46.28	$ 49.04	$ 36.02
Award vesting period (in years)			4 years
Performance based restricted stock units granted (in shares)	0	1	612	616
2010 Equity Incentive Plan | Performance based shares | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target share percentage for shares issued			0.00%
2010 Equity Incentive Plan | Performance based shares | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Target share percentage for shares issued			150.00%
2010 Equity Incentive Plan- Executive Employees | Performance based shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Period for recognition (in years)			3 years

Deposits - Summary of Deposits

Deposits - Summary of Deposits (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Deposits [Abstract]
GPR deposits	$ 778,753	$ 803,549
Other demand deposits	90,981	61,264
Total non-interest bearing deposit accounts	869,734	864,813
Checking accounts	114,628	140,555
Savings	9,465	10,523
GPR deposits	7,198	0
Time deposits, denominations greater than or equal to $100	3,914	4,752
Time deposits, denominations less than $100	1,263	1,537
Total interest-bearing deposit accounts	136,468	157,367
Total deposits	$ 1,006,202	$ 1,022,180

Deposits - Contractual Maturiti

Deposits - Contractual Maturities (Details) $ in Thousands	Sep. 30, 2018USD ($)
Deposits [Abstract]
Due in 2018	$ 569
Due in 2019	1,267
Due in 2020	1,380
Due in 2021	835
Due in 2022	790
Thereafter	336
Total time deposits	$ 5,177

Note Payable - Narrative (Detai

Note Payable - Narrative (Details) - USD ($)	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2014	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Deferred financing costs		$ 1,700,000		$ 1,700,000		$ 2,900,000
Repayments of notes payable				$ 16,875,000	$ 36,875,000
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Line of credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 225,000,000
Potential maximum borrowing capacity increase	50,000,000
Effective interest rate		4.81%		4.81%
Interest expense		$ 600,000	$ 1,000,000	$ 2,300,000	3,300,000
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Line of credit | Federal funds rate
Debt Instrument [Line Items]
Spread on interest rate				0.50%
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Line of credit | Base rate
Debt Instrument [Line Items]
Spread on interest rate				1.00%
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Line of credit | Minimum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate				2.50%
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Line of credit | Minimum | Base rate
Debt Instrument [Line Items]
Basis spread on variable rate				1.50%
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Line of credit | Maximum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate				3.00%
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Line of credit | Maximum | Base rate
Debt Instrument [Line Items]
Basis spread on variable rate				2.00%
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Term facility | Line of credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 150,000,000
Debt term	5 years
Quarterly principal payment				$ 5,600,000
Repayments of notes payable				$ 16,900,000	$ 16,900,000
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Revolving facility | Line of credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 75,000,000
Debt term	5 years

Note Payable - Schedule of Debt

Note Payable - Schedule of Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total notes payable	$ 63,931	$ 79,611
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Line of credit
Debt Instrument [Line Items]
Total notes payable	63,931	79,611
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Line of credit | Term facility
Debt Instrument [Line Items]
Total notes payable	63,931	79,611
Bank Of America, N.A., Wells Fargo Bank, National Association, And Other Lenders [Member] | Line of credit | Revolving facility
Debt Instrument [Line Items]
Total notes payable	$ 0	$ 0

Income Taxes - Effective Tax Ra

Income Taxes - Effective Tax Rate Reconciliation (Details)	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate (percent)	21.00%	35.00%
State income taxes, net of federal tax benefit	(0.10%)	(0.50%)
General business credits	(1.40%)	(3.00%)
Employee stock-based compensation	(16.10%)	(8.20%)
IRC 162(M) Limitation	2.70%	1.70%
Other	0.20%	(0.30%)
Effective tax rate (percent)	6.30%	24.70%

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2018	Sep. 30, 2017
Operating Loss Carryforwards [Line Items]
Provisional income tax benefit	$ 6,300
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate	$ 5,600	$ 6,536	$ 6,256
Unrecognized tax benefits, income tax penalties and interest accrued		300	$ 300
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		37,700
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		33,700
State | Latest tax year
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		11,800
State | Tax year 2023-2027
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards		$ 1,200

Income Taxes - Rollforward of U

Income Taxes - Rollforward of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Beginning balance	$ 5,560	$ 7,314
Increases related to positions taken during prior years	470	404
Increases related to positions taken during the current year	1,170	1,119
Decreases related to positions settled with tax authorities	0	(1,189)
Decreases as a result of a lapse of applicable statute of limitations	(664)	(1,392)
Ending balance	6,536	6,256
The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate	$ 6,536	$ 6,256	$ 5,600

Stockholders' Equity (Details)

Stockholders' Equity (Details) $ / shares in Units, shares in Thousands	1 Months Ended	9 Months Ended
	Nov. 30, 2017USD ($)	Sep. 30, 2018USD ($)transaction$ / sharesshares	Jun. 30, 2015USD ($)
Stockholders' Equity Note [Abstract]
Share repurchase program authorized amount			$ 150,000,000
Value of stock repurchased and retired during period	$ 150,000,000
Stock repurchased and retired during period (in shares) | shares		1,326
Average repurchase price per share (in usd per share) | $ / shares		$ 38.64
ASR Amount		$ (50,000,000)
Settlement of shares owed to counterparty		$ 2,000,000
Stock repurchase program (in transactions) | transaction		2

Earnings per Common Share - Bas

Earnings per Common Share - Basic Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 4,573	$ 13,639	$ 104,431	$ 73,659
Basic weighted-average common shares issued and outstanding (in shares)	52,580	50,519	52,046	50,330
Basic earnings per common share (in usd per share)	$ 0.09	$ 0.27	$ 2.01	$ 1.46
Diluted weighted-average Class A shares issued and outstanding (in shares)	54,615	52,923	54,437	52,788
Diluted earnings per common share (in usd per share)	$ 0.08	$ 0.26	$ 1.92	$ 1.40
Stock options
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive potential common shares:	214	790	372	764
Restricted stock units
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive potential common shares:	1,032	1,292	1,223	1,404
Performance based shares
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive potential common shares:	780	306	791	282
Employee stock purchase plan
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Dilutive potential common shares:	9	16	5	8

Earnings per Common Share - Ant

Earnings per Common Share - Antidilutive Shares (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Antidilutive Shares [Line Items]
Antidilutive shares (in shares)	223	595	123	310
Stock options
Antidilutive Shares [Line Items]
Antidilutive shares (in shares)	0	56	0	9
Performance based shares
Antidilutive Shares [Line Items]
Antidilutive shares (in shares)	223	539	123	301

Fair Value Measurements - Fair

Fair Value Measurements - Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 223,877	$ 153,509
Negotiable certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	15,000
Agency bond securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	19,584
Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	477	739
Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	76,345	20,861
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		1,000
U.S. Treasury notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		10,875
Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	223,877	153,509
Contingent consideration	13,502	17,358
Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Contingent consideration	0	0
Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	223,877	153,509
Contingent consideration	0	0
Recurring | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Contingent consideration	13,502	17,358
Recurring | Negotiable certificate of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	15,000
Recurring | Negotiable certificate of deposit | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0
Recurring | Negotiable certificate of deposit | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	15,000
Recurring | Negotiable certificate of deposit | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0
Recurring | Agency bond securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	19,584
Recurring | Agency bond securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0
Recurring | Agency bond securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	19,584
Recurring | Agency bond securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0
Recurring | Agency mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	112,471	120,034
Recurring | Agency mortgage-backed securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Agency mortgage-backed securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	112,471	120,034
Recurring | Agency mortgage-backed securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Municipal bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	477	739
Recurring | Municipal bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Municipal bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	477	739
Recurring | Municipal bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Asset-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	76,345	20,861
Recurring | Asset-backed securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	0	0
Recurring | Asset-backed securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	76,345	20,861
Recurring | Asset-backed securities | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities	$ 0	0
Recurring | Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		1,000
Recurring | Corporate bonds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Recurring | Corporate bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		1,000
Recurring | Corporate bonds | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Recurring | U.S. Treasury notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		10,875
Recurring | U.S. Treasury notes | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		0
Recurring | U.S. Treasury notes | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		10,875
Recurring | U.S. Treasury notes | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Available-for-sale securities		$ 0

Fair Value Measurements - Conti

Fair Value Measurements - Contingent Consideration Payable (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value of contingent consideration			$ (13,500)	$ 7,500
Contingent consideration payable
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$ 14,664	$ 21,911	17,358	8,634
Issuance	0	0	0	18,000
Payments of contingent consideration	(1,162)	(1,184)	(3,856)	(1,907)
Purchase accounting adjustment	0	0	0	3,500
Change in fair value of contingent consideration	0	0	0	(7,500)
Balance, end of period	$ 13,502	$ 20,727	$ 13,502	$ 20,727

Fair Value of Financial Instr_3

Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value Disclosures [Abstract]
Loans to bank customers, carrying amount	$ 21,917	$ 18,570
Loans to bank customers, fair value	21,270	18,102
Deposits, carrying value	1,006,202	1,022,180
Deposits, fair value	1,006,146	1,022,102
Note payable, carrying value	63,931	79,611
Note payable, fair value	$ 63,931	$ 79,611

Commitments and Contingencies (

Commitments and Contingencies (Details) $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended
	Jun. 30, 2016complaint	Jun. 30, 2017USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2017USD ($)	Sep. 30, 2017USD ($)
Loss Contingencies [Line Items]
Loss contingency accrual, provision		$ 26,000
Restricted cash			$ 559	$ 90,852	$ 62,374
Limited disruption in service | Migration of third-party card processor | Pending litigation
Loss Contingencies [Line Items]
Loss contingency, new claims filed (in complaints) | complaint	2
Limited disruption in service | Migration of third-party card processor | Other current liabilities | Pending litigation
Loss Contingencies [Line Items]
Loss contingency accrual, payments			13,500
Loss contingency accrual			$ 2,300

Significant Retailer Concentr_3

Significant Retailer Concentrations (Details) - Customer concentration risk - Walmart	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Percent of total operating revenues
Concentration Risk [Line Items]
Concentration risk, percentage	38.00%	41.00%	36.00%	39.00%
Settlement assets
Concentration Risk [Line Items]
Concentration risk, percentage			21.00%		33.00%

Segment Information (Details)

Segment Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018USD ($)	Sep. 30, 2017USD ($)	Sep. 30, 2018USD ($)segment	Sep. 30, 2017USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments (in segments) | segment			2
Operating revenues	$ 230,577	$ 201,613	$ 803,924	$ 677,162
Operating expenses	235,662	188,561	705,448	582,543
Operating income	(5,085)	13,052	98,476	94,619
Account Services
Segment Reporting Information [Line Items]
Operating revenues	186,623		597,350
Operating income			135,350	109,061
Processing and Settlement Services
Segment Reporting Information [Line Items]
Operating revenues	43,954		206,574
Operating income			71,469	64,575
Operating segments | Account Services
Segment Reporting Information [Line Items]
Operating revenues	193,763	170,160	620,462	512,967
Operating expenses	149,876	135,693	485,112	403,906
Operating income	43,887	34,467
Operating segments | Processing and Settlement Services
Segment Reporting Information [Line Items]
Operating revenues	44,150	39,088	207,914	187,862
Operating expenses	42,923	39,606	136,445	123,287
Operating income	1,227	(518)
Corporate and Other
Segment Reporting Information [Line Items]
Operating revenues	(7,336)	(7,635)	(24,452)	(23,667)
Operating expenses	42,863	13,262	83,891	55,350
Operating income	$ (50,199)	$ (20,897)	$ (108,343)	$ (79,017)