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Revenue Recognition
 12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Revenue Recognition Revenue Recognition
Disaggregation of Revenue
A majority of the Company’s revenues are earned through contracts with customers that normally provide for payment upon completion of specified work or units of work as identified in the contract. Although there is considerable variation in the terms of these contracts, they are primarily structured as fixed-price contracts, under which the Company agrees to perform a defined scope of a project for a fixed amount, or unit-price contracts, under which the Company agrees to do the work at a fixed price per unit of work as specified in the contract. The Company also enters into time-and-equipment and time-and-materials contracts under which the Company is paid for labor and equipment at negotiated hourly billing rates and for other expenses, including materials, as incurred at rates agreed to in the contract. Finally, the Company sometimes enters into cost-plus contracts, where the Company is paid for costs plus a negotiated margin. On occasion, time-and-equipment, time-and-materials and cost-plus contracts require the Company to include a guaranteed not-to-exceed maximum price.
Historically, fixed-price and unit-price contracts have had the highest potential margins; however, they have had a greater risk in terms of profitability because cost overruns may not be recoverable. Time-and-equipment, time-and-materials and cost-plus contracts have historically had less margin upside, but generally have had a lower risk of cost overruns. The Company also provides services under master service agreements (“MSAs”) and other variable-term service agreements. MSAs normally cover maintenance, upgrade and extension services, as well as new construction. Work performed under MSAs is typically billed on a unit-price, time-and-materials or time-and-equipment basis. MSAs are typically one to three years in duration; however, most of the Company’s contracts, including MSAs, may be terminated by the customer on short notice, typically 30 to 90 days, even if the Company is not in default under the contract. Under MSAs, customers generally agree to use the Company for certain services in a specified geographic region. Most MSAs include no obligation for the contract counterparty to assign specific volumes of work to the Company and do not require the counterparty to use the Company exclusively, although in some cases the MSA contract gives the Company a right of first refusal for certain work. Additional information related to the Company’s market types is provided in Note 16–Segment Information to the Financial Statements.
The components of the Company’s revenue by contract type were as follows for the year ended December 31:
2020
T&DC&ITotal
(dollars in thousands)AmountPercentAmountPercentAmountPercent
Fixed price$507,203 43.9 %$902,134 82.5 %$1,409,337 62.7 %
Unit price338,326 29.3 77,144 7.1 415,470 18.5 
T&E285,158 24.7 72,560 6.6 357,718 15.9 
Other23,691 2.1 41,176 3.8 64,867 2.9 
$1,154,378 100.0 %$1,093,014 100.0 %$2,247,392 100.0 %
2019
T&DC&ITotal
(dollars in thousands)AmountPercentAmountPercentAmountPercent
Fixed price$564,251 49.7 %$704,743 75.2 %$1,268,994 61.3 %
Unit price228,223 20.1 54,433 5.8 282,656 13.6 
T&E316,943 27.9 101,770 10.9 418,713 20.2 
Other24,994 2.3 75,802 8.1 100,796 4.9 
$1,134,411 100.0 %$936,748 100.0 %$2,071,159 100.0 %
2018
T&DC&ITotal
(dollars in thousands)AmountPercentAmountPercentAmountPercent
Fixed price$361,699 40.5 %$452,732 71.0 %$814,431 53.2 %
Unit price181,179 20.3 51,590 8.1 232,769 15.2 
T&E305,581 34.2 34,938 5.4 340,519 22.2 
Other44,649 5.0 98,801 15.5 143,450 9.4 
$893,108 100.0 %$638,061 100.0 %$1,531,169 100.0 %
The components of the Company’s revenue by market type were as follows for the year ended December 31:
202020192018
(dollars in thousands)SegmentAmountPercentAmountPercentAmountPercent
TransmissionT&D$745,599 33.2 %$772,609 37.3 %$559,467 36.5 %
DistributionT&D408,779 18.2 361,802 17.5 333,641 21.8 
Electrical constructionC&I1,093,014 48.6 936,748 45.2 638,061 41.7 
Total revenue$2,247,392 100.0 %$2,071,159 100.0 %$1,531,169 100.0 %
Remaining Performance Obligations
On December 31, 2020, the Company had $1.54 billion of remaining performance obligations. The Company’s remaining performance obligations includes projects that have a written award, a letter of intent, a notice to proceed or an agreed upon work order to perform work on mutually accepted terms and conditions.
The following table summarizes that amount of remaining performance obligations as of December 31, 2020 that the Company expects to be realized and the amount of the remaining performance obligations that the Company reasonably estimates will not be recognized within the next twelve months.
Remaining Performance Obligations as of December 31, 2020
(in thousands)TotalAmount estimated to not be
recognized within 12 months
T&D$645,422 $184,526 
C&I889,596 208,519 
Total$1,535,018 $393,045 
The Company expects a vast majority of the remaining performance obligations to be recognized within twenty-four months, although the timing of the Company’s performance is not always under its control. Additionally, the difference between the remaining performance obligations and backlog is due to the exclusion of a portion of the Company’s MSAs under certain contract types from the Company’s remaining performance obligations as these contracts can be canceled for convenience at any time by the Company or the customer without considerable cost incurred by the customer. Additional information related to backlog is provided in “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this Annual Report.