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Restructuring and Related Activities (Tables)
12 Months Ended
Dec. 31, 2020
Restructuring and Related Activities [Abstract]  
Schedule of Restructuring Reserve
The changes in restructuring activity by reportable segment during the years ended December 31, 2020 and 2019 were as follows (in thousands):
United States
electrical
construction
and facilities
services segment
United States
mechanical
construction
and facilities
services segment
United States
building
services segment
Corporate administrationTotal
Balance at December 31, 2018$30 $— $176 $1,424 $1,630 
Charges445 — 1,078 — 1,523 
Payments(30)— (842)(723)(1,595)
Balance at December 31, 2019445 — 412 701 1,558 
Charges1,072 1,073 69 — 2,214 
Payments(239)— (481)(355)(1,075)
Balance at December 31, 2020$1,278 $1,073 $— $346 $2,697