Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill	$ 1,039,364
Accumulated impairment losses	0
Goodwill, Net	1,039,364	1,039,364
Software Delivery
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill	320,299
Accumulated impairment losses	0
Goodwill, Net	320,299
Services Delivery
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill	87,665
Accumulated impairment losses	0
Goodwill, Net	87,665
Client Support
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill	327,793
Accumulated impairment losses	0
Goodwill, Net	327,793
Pathway Solutions
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill	208,795
Accumulated impairment losses	0
Goodwill, Net	208,795
IT Outsourcing
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill	59,029
Accumulated impairment losses	0
Goodwill, Net	59,029
Remote Hosting
Schedule Of Goodwill And Intangible Assets [Line Items]
Goodwill	35,783
Accumulated impairment losses	0
Goodwill, Net	$ 35,783