Preliminary Purchase Price Allocation of Official Payments Holdings, Online Resources Corporation and PTESA (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Goodwill	$ 913,261	$ 781,163	$ 669,217
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 | 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 | 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 | 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