Acquisitions (Tables)

12 Months Ended

Dec. 31, 2014

Business Combinations [Abstract]

Business Acquisition Purchase Price Allocation Assets Acquired and Liabilities Assumed

This allocation requires a significant use of estimates and is based on information that was available to management at the time these consolidated financial statements were prepared (in thousands).

	2014			2013
Consideration:
Value of Quanta common stock and exchangeable shares issued	$	134,538		$	88,895
Cash paid or payable		284,312			341,064
Fair value of total consideration transferred	$	418,850		$	429,959
Current assets	$	172,298		$	193,895
Property and equipment		159,186			60,988
Other assets		3,500			1,009
Identifiable intangible assets		96,302			55,124
Current liabilities		(144,252	)		(127,430	)
Deferred tax liabilities, net		(37,743	)		(4,083	)
Other long-term liabilities		(4,926	)		(5,350	)
Total identifiable net assets		244,365			174,153
Goodwill		174,485			255,806
	$	418,850		$	429,959

Estimated Fair Values of Identifiable Intangible Assets and Related Weighted Average Amortization

The following table summarizes the estimated fair values of identifiable intangible assets and the related weighted average amortization periods by type as of the respective acquisition dates for the 2014 acquisitions (in thousands, except for weighted average amortization periods, which are in years).

	Estimated Fair Value at Acquisition Date		Weighted Average Amortization Period at Acquisition Date
Customer relationships	$	65,243		12.2
Backlog		17,059		1.1
Trade names		10,436		9.7
Non-compete agreements		3,160		5.0
Patented rights and developed technology		404		10.0
Total intangible assets subject to amortization acquired in 2014 acquisitions	$	96,302		9.7

Unaudited Supplemental Pro Forma Results of Operations

Future results may vary significantly from the results reflected in the following pro forma financial information because of future events and transactions, as well as other factors (in thousands, except per share amounts):

	Year Ended December 31,
	2014		2013		2012
Revenues	$	8,391,061	$	7,740,575	$	6,477,648
Gross profit	$	1,267,778	$	1,254,211	$	1,060,370
Selling, general and administrative expenses	$	737,488	$	579,818	$	478,184
Amortization of intangible assets	$	43,658	$	52,405	$	52,339
Net income from continuing operations	$	322,358	$	481,263	$	344,925
Net income from continuing operations attributable to common stock	$	303,990	$	461,875	$	328,898
Earnings per share from continuing operations attributable to common stock — basic and diluted	$	1.37	$	2.08	$	1.52