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Summary of Computer Software (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Research And Development [Line Items]
Computer software	$ 854,256	$ 782,607
Accumulated amortization	627,339	567,363
Computer software, net	226,917	215,244
Licensed computer software
Schedule Of Research And Development [Line Items]
Computer software	461,217	423,100
Accumulated amortization	336,521	309,571
Software development costs
Schedule Of Research And Development [Line Items]
Computer software	303,668	283,452
Accumulated amortization	232,113	208,781
Acquisition technology intangibles
Schedule Of Research And Development [Line Items]
Computer software	89,371	76,055
Accumulated amortization	$ 58,705	$ 49,011

For each balance sheet presented, the amount of accumulated amortization for capitalized computer software costs.

The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.