Quanta Services, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Cover
- Document and Entity Information
Financial Statements
Notes to Financial Statements
Accounting Policies
- Summary of Significant Accounting Policies (Policies)
Notes Tables
Notes Details

Equity - Based Compensation (Details)

v2.4.0.6

Equity - Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Long Term Incentive Plans (Textual) [Abstract]
Aggregate number of shares of common stock that may be issued for awards pursuant to the 2011 plan	11,750,000
Aggregate number of shares of common stock that may be issued pursuant to the terms of the 2007 Plan	4,000,000
Restricted Stock [Member]
Additional Long Term Incentive Plans (Textual) [Abstract]
Granted, shares	1,200,000	800,000
Granted, per share	$ 21.65	$ 22.34
Vested, shares	900,000	800,000
Fair value of restricted stock, vested	$ 18.5	$ 19.0
Unrecognized compensation cost, related to unvested restricted stock, total	38.2
Expected weighted average period to recognize compensation cost on restricted stock (in years)	2.30
Vesting period for restricted stock and restricted stock units	3 years	3 years
Restricted Stock Units (RSUs) [Member]
Additional Long Term Incentive Plans (Textual) [Abstract]
Vesting period for restricted stock and restricted stock units	3 years
Compensation expense related to Restricted Stock Units	0.4	0.3
Liabilities under Compensation Plan	0.6		0.5
Payment to settle liabilities under compensation plan	$ 0.3	$ 0.1

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, using a decimal to express in number of years.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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