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Segment Information (Tables)
12 Months Ended
Dec. 31, 2018
Segment Reporting [Abstract]  
Summarized Financial Information Summarized financial information for Quanta’s reportable segments is presented in the following table (in thousands):
 
 
Year Ended December 31,
 
 
2018
 
2017
 
2016
Revenues:
 
 

 
 

 
 

Electric Power Infrastructure Services
 
$
6,415,562

 
$
5,599,836

 
$
4,850,495

Pipeline and Industrial Infrastructure Services
 
4,755,861

 
3,866,642

 
2,800,824

Consolidated
 
$
11,171,423

 
$
9,466,478

 
$
7,651,319

Operating income (loss):
 
 

 
 

 
 

Electric Power Infrastructure Services
 
$
628,286

 
$
518,130

 
$
395,745

Pipeline and Industrial Infrastructure Services
 
204,178

 
184,083

 
149,502

Corporate and non-allocated costs
 
(292,195
)
 
(323,364
)
 
(224,434
)
Consolidated
 
$
540,269

 
$
378,849

 
$
320,813

Depreciation:
 
 

 
 

 
 

Electric Power Infrastructure Services
 
$
96,300

 
$
91,708

 
$
91,269

Pipeline and Industrial Infrastructure Services
 
89,046

 
76,355

 
67,374

Corporate and non-allocated costs
 
17,173

 
15,745

 
11,597

Consolidated
 
$
202,519

 
$
183,808

 
$
170,240