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Acquisitions - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended								12 Months Ended			0 Months Ended		1 Months Ended	0 Months Ended
Acquisitions - Additional Information (Detail) (USD $)	Aug. 12, 2014	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013 Entity	Dec. 31, 2012 Entity	Nov. 05, 2013	Mar. 11, 2013	Sep. 18, 2012	May 24, 2012	Feb. 13, 2012	Dec. 31, 2011	Sep. 18, 2014
Business Acquisition [Line Items]
Business acquisition cash paid	$ 205,100,000											$ 641,700,000
Additional borrowing										169,500,000us-gaap_ProceedsFromLinesOfCredit	40,000,000us-gaap_ProceedsFromLinesOfCredit	119,000,000us-gaap_ProceedsFromLinesOfCredit
Acquisition related transaction expenses										2,700,000
Operating income		79,271,000us-gaap_OperatingIncomeLoss	31,869,000us-gaap_OperatingIncomeLoss	26,741,000us-gaap_OperatingIncomeLoss	291,000us-gaap_OperatingIncomeLoss	85,980,000us-gaap_OperatingIncomeLoss	29,555,000us-gaap_OperatingIncomeLoss	11,522,000us-gaap_OperatingIncomeLoss	(4,009,000)us-gaap_OperatingIncomeLoss	138,172,000us-gaap_OperatingIncomeLoss	123,048,000us-gaap_OperatingIncomeLoss	74,372,000us-gaap_OperatingIncomeLoss
Total Purchase Price											378,100,000
Number of businesses acquired											3us-gaap_NumberOfBusinessesAcquired	3us-gaap_NumberOfBusinessesAcquired
Goodwill		781,163,000us-gaap_Goodwill				669,217,000us-gaap_Goodwill				781,163,000us-gaap_Goodwill	669,217,000us-gaap_Goodwill							501,141,000us-gaap_Goodwill
Issuance of shares from treasury stock for acquisition of S1 Corporation												286,500
Realized gain on available-for-sale securities												1,557,000
Term credit facility
Business Acquisition [Line Items]
Additional borrowing	150,000,000
Revolving Credit Facility
Business Acquisition [Line Items]
Additional borrowing	60,500,000
Profesionales en Transacciones Electronicas S.A. - Venezuela ("PTESA-V")
Business Acquisition [Line Items]
Percentage of ownership interest acquired									100.00%
Profesionales en Transacciones Electronicas S.A. - Ecuador ("PTESA-E")
Business Acquisition [Line Items]
Percentage of ownership interest acquired									100.00%
Profesionales En Transacciones Electronicas Venezuela And Ecuador
Business Acquisition [Line Items]
Total Purchase Price									2,800,000
Profesionales en Transacciones Electronicas S.A. - Colombia ("PTESA-C")
Business Acquisition [Line Items]
Total Purchase Price									11,400,000
Profesionales en Transacciones Electronicas S.A
Business Acquisition [Line Items]
Total Purchase Price									14,200,000
Goodwill		7,113,000								7,113,000
Purchase price, non tax deductible goodwill amount									1,500,000
Retail Decisions [Member]
Business Acquisition [Line Items]
Revenue										17,900,000
Operating income										1,900,000
Goodwill		135,643,000								135,643,000
Official Payments Holdings, Inc.
Business Acquisition [Line Items]
Business acquisition cash paid													139,800,000
Additional borrowing													40,000,000
Acquisition related transaction expenses											1,200,000
Revenue										135,700,000	23,300,000
Cash paid per common stock													$ 8.35
Goodwill		29,236,000				29,200,000				29,236,000	29,200,000
Online Resources Corporation
Business Acquisition [Line Items]
Acquisition related transaction expenses											5,400,000
Revenue										151,300,000	120,800,000
Operating income											6,400,000
Total Purchase Price														260,100,000
Cash paid per common stock														$ 3.85
Goodwill		122,247,000								122,247,000
Business acquisition common stock purchase price														132,900,000
Distra Pty Ltd
Business Acquisition [Line Items]
Business acquisition cash paid															49,800,000
Goodwill						21,307,000					21,307,000
Percentage of ownership interest acquired																			100.00%
North Data Uruguay S.A.
Business Acquisition [Line Items]
Total Purchase Price																4,600,000
Goodwill																3,500,000
Business acquisition, cash acquired																100,000
S1 Corporation
Business Acquisition [Line Items]
Business acquisition cash paid																	368,700,000
Acquisition related transaction expenses												6,100,000
Revenue												161,900,000
Operating income												(6,900,000)
Total Purchase Price																	587,284,000
Goodwill						256,244,000					256,244,000
Acquisition transaction paid in shares																	5,900,000
Issuance of shares from treasury stock for acquisition of S1 Corporation																	95,500
Cash price per share S1 stockholders could elect to receive for one share of S1 stock																	$ 10.00
Pro-Rata share of the Company stock a S1 stockholder could elect to receive for one share of S1 stock																	0.3148
Proration of exchange percentage of S1 share																	33.80%
Proration of exchange percentage, S1 share for cash																	66.20%
Share price used to calculate cash payment for fractional shares																	$ 34.14
Realized gain on available-for-sale securities												1,600,000
Acquisition transaction paid in cash																	73,700,000
Customer relationships \| Profesionales en Transacciones Electronicas S.A
Business Acquisition [Line Items]
Amortizable intangible assets		7,732,000								7,732,000
Customer relationships \| Retail Decisions [Member]
Business Acquisition [Line Items]
Amortizable intangible assets		50,480,000								50,480,000
Acquired intangible assets, weighted-average useful lives										18 years
Customer relationships \| Official Payments Holdings, Inc.
Business Acquisition [Line Items]
Amortizable intangible assets		47,400,000				47,400,000				47,400,000	47,400,000
Customer relationships \| Online Resources Corporation
Business Acquisition [Line Items]
Amortizable intangible assets		68,750,000								68,750,000
Customer relationships \| Distra Pty Ltd
Business Acquisition [Line Items]
Amortizable intangible assets						6,200,000					6,200,000
Customer relationships \| North Data Uruguay S.A.
Business Acquisition [Line Items]
Amortizable intangible assets																2,200,000
Acquired intangible assets, weighted-average useful lives																12 years 7 months 6 days
Customer relationships \| S1 Corporation
Business Acquisition [Line Items]
Amortizable intangible assets						108,690,000					108,690,000
Maximum \| Official Payments Holdings, Inc.
Business Acquisition [Line Items]
Operating income											(100,000)
Maximum \| Customer relationships \| Profesionales en Transacciones Electronicas S.A
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives										15 years
Maximum \| Customer relationships \| Official Payments Holdings, Inc.
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives										15 years
Maximum \| Customer relationships \| Online Resources Corporation
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives										15 years
Maximum \| Customer relationships \| Distra Pty Ltd
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives											20 years
Maximum \| Customer relationships \| S1 Corporation
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives											20 years
Series A-1 Convertible Preferred Stock \| Online Resources Corporation
Business Acquisition [Line Items]
Business acquisition preferred stock purchase price														127,200,000
Available-for-sale Securities \| S1 Corporation
Business Acquisition [Line Items]
Issuance of shares for acquisition of S1 Corporation												1,107,000
New Senior Secured Credit Facilities
Business Acquisition [Line Items]
Additional borrowings under credit facility										300,000,000
New Senior Secured Credit Facilities \| S1 Corporation
Business Acquisition [Line Items]
Additional borrowings under credit facility																	$ 295,000,000