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

Stock-Based Compensation - Additional Information (Details) $ in Thousands, shares in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) incentivePlan shares	Mar. 31, 2021 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity incentive plans \| incentivePlan	2
Non-cash stock compensation expense	$ 22,992	$ 18,687
Restricted Stock Units to be Settled in Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted stock, vested	132,900	111,200
Non-cash stock compensation expense	19,500	15,100
Unrecognized compensation cost, related to unvested RSUs to be settled in common stock, total	$ 195,300
Expected weighted average period to recognize compensation cost on RSUs to be settled in common stock	4 years 14 days
Performance Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted stock, vested	$ 72,400	45,200
Non-cash stock compensation expense	3,500	$ 3,600
Unrecognized compensation cost, related to unvested RSUs to be settled in common stock, total	$ 30,500
Expected weighted average period to recognize compensation cost on RSUs to be settled in common stock	2 years 1 month 2 days
Number of common shares issued in connection with performance units (in shares) \| shares	0.7	0.5