Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of goodwill and intangible assets

Goodwill and intangible assets consisted of the following at December 31:

	2021						2020
(in thousands)	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Goodwill
T&D	$	40,224	$	—	$	40,224	$	40,224	$	—	$	40,224
C&I	25,841		—		25,841		25,841		—		25,841
Total goodwill	$	66,065	$	—	$	66,065	$	66,065	$	—	$	66,065
Amortizable Intangible Assets
Backlog	$	5,289	$	5,289	$	—	$	5,289	$	5,289	$	—
Customer relationships	31,381		11,179		20,202		31,381		8,914		22,467
Trade names	696		311		385		696		264		432
Indefinite-lived Intangible Assets
Trade names	28,467		—		28,467		28,466		—		28,466
Total intangible assets	$	65,833	$	16,779	$	49,054	$	65,832	$	14,467	$	51,365

Schedule of estimated future intangible asset amortization expense

As of December 31, 2021, estimated future intangible asset amortization expense for the each of the next five years and thereafter was as follows:

(in thousands)	Future Amortization Expense
2022	$	2,312
2023	2,312
2024	2,312
2025	2,312
2026	2,312
Thereafter	9,027
Total	$	20,587