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Acquisitions - Business Acquisition Purchase Price Allocation Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Business Combinations [Abstract] |  |
Value of Quanta common stock and exchangeable shares issued |  | $ 10,127
Cash paid or payable | $ 42,211 | 110,428
Contingent consideration | 15,400 | 1,001
Fair value of total consideration transferred or estimated to be transferred | 57,611 | 121,556
Current assets | 16,489 | 35,188
Property and equipment | 30,649 | 44,140
Other assets | 1,972 | 4
Identifiable intangible assets | 8,327 | 24,987
Current liabilities | (7,349) | (24,633)
Deferred tax liabilities, net | (13,267) | (4,912)
Other long-term liabilities | (5,326) | (5,606)
Non-controlling interests |  | 747
Total identifiable net assets | 31,495 | 69,915
Goodwill | 26,116 | 51,641
Fair value of total consideration transferred | $ 57,611 | $ 121,556

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