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Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue from Contract with Customer [Abstract]
Incentive payments	$ 1,800	$ 1,200	$ 3,500	$ 2,300
GPR, average useful life			5 months
Gift Card, average useful life			6 months
Disaggregation of Revenue [Line Items]
Deferred revenue, revenue recognized	9,400		$ 28,300
Operating revenues	258,349	$ 222,548	573,347	$ 475,549
Account Services Segment [Member]
Disaggregation of Revenue [Line Items]
Operating revenues	196,855		410,727
Account Services Segment [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Operating revenues	72,070		149,416
Account Services Segment [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Operating revenues	124,785		261,311
Processing and Settlement Services Segment [Member]
Disaggregation of Revenue [Line Items]
Operating revenues	61,494		162,620
Processing and Settlement Services Segment [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Operating revenues	881		1,772
Processing and Settlement Services Segment [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Operating revenues	$ 60,613		$ 160,848

X

- Definition

GPR, Average Useful Life

+ References

No definition available.

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- Definition

Gift Card, Average Useful Life

+ References

No definition available.

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- Definition

Amount of revenue recognized that was previously reported as deferred or unearned revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB TOPIC 13.A.4(a).Q1 Response))
-URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Primarily represents commissions incurred in the period based upon the sale by commissioned employees or third parties of the entity's goods or services, and fees for sales assistance or product enhancements performed by third parties (such as a distributor or value added reseller).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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