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Segment Information (Tables)
3 Months Ended
Mar. 31, 2021
Segment Reporting [Abstract]  
Schedule of segment's internal financial reports
The information in the following table is derived from the segment’s internal financial reports used for corporate management purposes:
Three months ended
March 31,
(in thousands)20212020
Contract revenues:
T&D$314,908 $259,270 
C&I277,578 259,200 
$592,486 $518,470 
Income from operations:
T&D$28,673 $17,964 
C&I14,272 9,312 
General Corporate(15,534)(10,868)
$27,411 $16,408