Annual report pursuant to Section 13 and 15(d)

Acquisition - Business Acquisition Purchase Price Allocation Assets Acquired and Liabilities Assumed (Detail)

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Acquisition - Business Acquisition Purchase Price Allocation Assets Acquired and Liabilities Assumed (Detail) (All Acquisitions [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
All Acquisitions [Member]
   
Business Acquisition [Line Items]    
Value of Quanta common stock issued $ 37,291 $ 32,368
Cash paid 68,507 84,208
Current assets 20,516 30,198
Property and equipment 18,821 19,878
Other assets 123 379
Identifiable intangible assets 17,931 40,229
Current liabilities (10,008) (10,226)
Deferred tax liabilities, net (6,173) (7,190)
Other long-term liabilities (191) (450)
Total identifiable net assets 41,019 72,818
Goodwill 64,779 43,758
Fair value of total consideration transferred $ 105,798 $ 116,576