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Detail of Identifiable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Acquired Intangible Assets by Major Class [Line Items] |  |
Cost | $ 2,139,100 | $ 746,696
Accumulated amortization | (229,444) | (154,411)
Net | 1,909,656 | 592,285
Gross carrying amount | 555,895 | 252,034
Accumulated amortization |  |
Net | 555,895 | 252,034
Finite-life intangibles |  |
Acquired Intangible Assets by Major Class [Line Items] |  |
Cost | 1,583,205 | 494,662
Accumulated amortization | (229,444) | (154,411)
Net | 1,353,761 | 340,251
Finite-life intangibles | Customer relationships |  |
Acquired Intangible Assets by Major Class [Line Items] |  |
Cost | 1,276,793 | 358,410
Accumulated amortization | (152,769) | (109,887)
Net | 1,124,024 | 248,523
Finite-life intangibles | Trade names intangibles |  |
Acquired Intangible Assets by Major Class [Line Items] |  |
Cost | 1,525 | 1,515
Accumulated amortization | (686) | (530)
Net | 839 | 985
Finite-life intangibles | Proprietary technology |  |
Acquired Intangible Assets by Major Class [Line Items] |  |
Cost | 263,647 | 134,737
Accumulated amortization | (57,711) | (43,994)
Net | 205,936 | 90,743
Finite-life intangibles | Backlog |  |
Acquired Intangible Assets by Major Class [Line Items] |  |
Cost | 41,240 |
Accumulated amortization | (18,278) |
Net | $ 22,962 |

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