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v3.22.1

Revenue Recognition (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2022 | Mar. 31, 2021 | Sep. 30, 2021
Revenue Recognition and Deferred Revenue [Abstract] |  |  |  |  |
Unbilled Receivables, Current | $ 21,824 |  | $ 21,824 |  |
Costs and estimated earnings in excess of billings | 55,517 |  | 55,517 |  | $ 43,389
Billings in excess of costs and estimated earnings | (63,619) |  | (63,619) |  | $ (62,486)
Contract with Customer, Liability, Revenue Recognized | 38,349 | $ 28,385 | 45,115 | $ 33,740 |
Performance Obligation Next 12 Months | 792,953 |  | 792,953 |  |
Revenue, Remaining Performance Obligation, Amount | 835,548 |  | 835,548 |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 501,593 | 331,961 | 982,102 | 646,799 |
Contract with Customer, Liability, Revenue Recognized | 38,349 | 28,385 | 45,115 | 33,740 |
Commercial and Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 68,815 | 52,023 | 138,063 | 114,613 |
Communications [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 130,639 | 94,886 | 258,028 | 193,242 |
Infrastructure Solutions [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 41,733 | 34,716 | 83,829 | 69,117 |
Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 260,406 | 150,336 | 502,182 | 269,827 |
Fixed-price Contract [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 450,398 | 300,849 | 885,909 | 589,705 |
Fixed-price Contract [Member] | Commercial and Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 64,346 | 49,003 | 129,206 | 109,690 |
Fixed-price Contract [Member] | Communications [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 85,722 | 68,551 | 174,144 | 144,565 |
Fixed-price Contract [Member] | Infrastructure Solutions [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 39,924 | 32,959 | 80,377 | 65,623 |
Fixed-price Contract [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 260,406 | 150,336 | 502,182 | 269,827 |
Time-and-materials Contract [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 51,195 | 31,112 | 96,193 | 57,094 |
Time-and-materials Contract [Member] | Commercial and Industrial [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 4,469 | 3,020 | 8,857 | 4,923 |
Time-and-materials Contract [Member] | Communications [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 44,917 | 26,335 | 83,884 | 48,677 |
Time-and-materials Contract [Member] | Infrastructure Solutions [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 1,809 | 1,757 | 3,452 | 3,494 |
Time-and-materials Contract [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 0 | 0 | 0 | 0 |
industrial Services [Member] | Infrastructure Solutions [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 15,837 | 10,548 | 30,653 | 20,588 |
Custom Power Solutions [Member] | Infrastructure Solutions [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 25,896 | 24,168 | 53,176 | 48,529 |
Single Family Contracts [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | 192,368 | 100,476 | 365,896 | 172,602 |
Multi Family and Other [Member] | Residential [Member] |  |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |  |
Revenues | $ 68,038 | $ 49,860 | $ 136,286 | $ 97,225 |

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