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v3.21.2

Segment Information - Schedule of Reconciliation of Net Income to EBITDA (Detail) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net income | $ 73,795 | $ 61,366 | $ 48,545 | $ 42,710 | $ 47,218 | $ 42,402 | $ 183,705 | $ 132,331
Interest income, net | 10 |  |  | 208 |  |  | 0 | 801
Income tax expense | 24,311 |  |  | 14,435 |  |  | 61,235 | 43,938
Depreciation and amortization |  |  |  |  |  |  | 25,604 | 12,450
Operating Segments [Member] |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net income | 73,795 |  |  | 42,710 |  |  | 183,705 | 132,331
Interest income, net | (10) |  |  | (208) |  |  |  | (801)
Income tax expense | 24,311 |  |  | 14,435 |  |  | 61,235 | 43,938
Depreciation and amortization | 9,901 |  |  | 4,535 |  |  | 25,604 | 12,450
EBITDA | 107,997 |  |  | 61,472 |  |  | 270,544 | 187,918
Operating Segments [Member] | Residential [Member] |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net income | 72,603 |  |  | 42,225 |  |  | 182,437 | 129,157
Interest income, net | (10) |  |  | (208) |  |  |  | (801)
Income tax expense | 23,899 |  |  | 14,276 |  |  | 60,797 | 42,853
Depreciation and amortization | 9,643 |  |  | 4,326 |  |  | 24,873 | 11,855
EBITDA | 106,135 |  |  | 60,619 |  |  | 268,107 | 183,064
Operating Segments [Member] | Commercial [Member] |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Net income | 1,192 |  |  | 485 |  |  | 1,268 | 3,174
Income tax expense | 412 |  |  | 159 |  |  | 438 | 1,085
Depreciation and amortization | 258 |  |  | 209 |  |  | 731 | 595
EBITDA | $ 1,862 |  |  | $ 853 |  |  | $ 2,437 | $ 4,854

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