Reconciliation of Geographic Revenues to Revenues by Operating Segment Based on Domicile of Customers (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012		Mar. 31, 2011
Segment Reporting Information [Line Items]
Total revenues	$ 461,162		$ 429,430
United States
Segment Reporting Information [Line Items]
Total revenues	305,500		292,700
Europe
Segment Reporting Information [Line Items]
Total revenues	73,000	[1]	65,800	[1]
Canada
Segment Reporting Information [Line Items]
Total revenues	50,800		44,100
Japan
Segment Reporting Information [Line Items]
Total revenues	18,400	[1]	17,400	[1]
Mexico
Segment Reporting Information [Line Items]
Total revenues	2,400		1,900
Other
Segment Reporting Information [Line Items]
Total revenues	11,100		7,500
North America Services
Segment Reporting Information [Line Items]
Total revenues	235,400		227,500
North America Services | United States
Segment Reporting Information [Line Items]
Total revenues	179,500		178,900
North America Services | Europe
Segment Reporting Information [Line Items]
Total revenues	200		200
North America Services | Canada
Segment Reporting Information [Line Items]
Total revenues	50,700		44,000
North America Services | Mexico
Segment Reporting Information [Line Items]
Total revenues	2,400		1,900
North America Services | Other
Segment Reporting Information [Line Items]
Total revenues	2,600		2,500
International Services
Segment Reporting Information [Line Items]
Total revenues	99,600		87,800
International Services | Europe
Segment Reporting Information [Line Items]
Total revenues	72,800		65,600
International Services | Japan
Segment Reporting Information [Line Items]
Total revenues	18,400		17,400
International Services | Other
Segment Reporting Information [Line Items]
Total revenues	8,400		4,800
Merchant services
Segment Reporting Information [Line Items]
Total revenues	126,200		114,100
Merchant services | United States
Segment Reporting Information [Line Items]
Total revenues	125,900		113,800
Merchant services | Canada
Segment Reporting Information [Line Items]
Total revenues	100		100
Merchant services | Other
Segment Reporting Information [Line Items]
Total revenues	$ 200		$ 200

[1] Revenues are impacted by movements in foreign currency exchange rates. Refer to the discussion under "Revenues" in the Results of Operations.