Preliminary Purchase Price Allocation of Official Payments Holdings, Online Resources Corporation and PTESA (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2011
Business Acquisition [Line Items]
Goodwill	781,163	$ 669,217	$ 501,141
Retail Decisions [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	795
Billed and accrued receivables, net	10,126
Deferred income taxes, net	250
Other current assets	9,932
Total current assets acquired	21,103
Property and equipment	3,354
Goodwill	135,643
Deferred income taxes	1,622
Other noncurrent assets	416
Total assets acquired	249,734
Accounts payable	4,624
Accrued employee compensation	7,289
Other current liabilities	6,168
Total current liabilities acquired	18,081
Deferred income taxes, net	26,404
Other noncurrent liabilities acquired	164
Total liabilities acquired	44,649
Net assets acquired	205,085
Official Payments Holdings, Inc.
Business Acquisition [Line Items]
Cash and cash equivalents	25,871
Billed and accrued receivables, net	2,858
Deferred income taxes, net	4,692
Other current assets	27,642
Total current assets acquired	61,063
Property and equipment	6,340
Goodwill	29,236	29,200
Other noncurrent assets	19,178
Total assets acquired	192,342
Accounts payable	9,414
Accrued employee compensation	15,006
Other current liabilities	27,312
Total current liabilities acquired	51,732
Other noncurrent liabilities acquired	828
Total liabilities acquired	52,560
Net assets acquired	139,782
Online Resources Corporation
Business Acquisition [Line Items]
Cash and cash equivalents	9,930
Billed and accrued receivables, net	19,394
Deferred income taxes, net	11,726
Other current assets	17,643
Total current assets acquired	58,693
Property and equipment	7,335
Goodwill	122,247
Other noncurrent assets	459
Total assets acquired	322,749
Accounts payable	15,394
Accrued employee compensation	10,549
Note payable	7,500
Other current liabilities	7,559
Total current liabilities acquired	41,002
Deferred income taxes, net	18,290
Other noncurrent liabilities acquired	3,339
Total liabilities acquired	62,631
Net assets acquired	260,118
Profesionales en Transacciones Electronicas S.A
Business Acquisition [Line Items]
Cash and cash equivalents	193
Billed and accrued receivables, net	327
Other current assets	95
Total current assets acquired	615
Property and equipment	6
Goodwill	7,113
Other noncurrent assets	7
Total assets acquired	15,473
Accounts payable	341
Accrued employee compensation	261
Total current liabilities acquired	602
Deferred income taxes, net	225
Other noncurrent liabilities acquired	439
Total liabilities acquired	1,266
Net assets acquired	14,207
Software | Retail Decisions [Member]
Business Acquisition [Line Items]
Amortizable intangible assets	33,136
Software | Retail Decisions [Member] | Minimum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	5 years
Software | Retail Decisions [Member] | Maximum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	7 years
Software | Official Payments Holdings, Inc.
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	10 years
Amortizable intangible assets	26,125
Software | Online Resources Corporation
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	10 years
Amortizable intangible assets	62,215
Customer relationships | Retail Decisions [Member]
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	18 years
Amortizable intangible assets	50,480
Customer relationships | Official Payments Holdings, Inc.
Business Acquisition [Line Items]
Amortizable intangible assets	47,400	47,400
Customer relationships | Official Payments Holdings, Inc. | Minimum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	14 years
Customer relationships | Official Payments Holdings, Inc. | Maximum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	15 years
Customer relationships | Online Resources Corporation
Business Acquisition [Line Items]
Amortizable intangible assets	68,750
Customer relationships | Online Resources Corporation | Minimum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	14 years
Customer relationships | Online Resources Corporation | Maximum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	15 years
Customer relationships | Profesionales en Transacciones Electronicas S.A
Business Acquisition [Line Items]
Amortizable intangible assets	7,732
Customer relationships | Profesionales en Transacciones Electronicas S.A | Minimum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	14 years
Customer relationships | Profesionales en Transacciones Electronicas S.A | Maximum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	15 years
Trademarks | Retail Decisions [Member]
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	5 years
Amortizable intangible assets	3,980
Trademarks | Official Payments Holdings, Inc.
Business Acquisition [Line Items]
Amortizable intangible assets	3,000
Trademarks | Official Payments Holdings, Inc. | Minimum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	3 years
Trademarks | Official Payments Holdings, Inc. | Maximum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	5 years
Trademarks | Online Resources Corporation
Business Acquisition [Line Items]
Amortizable intangible assets	3,050
Trademarks | Online Resources Corporation | Minimum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	3 years
Trademarks | Online Resources Corporation | Maximum
Business Acquisition [Line Items]
Acquired intangible assets, weighted-average useful lives	5 years