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Segment Information - Schedule of Reconciliation of Net Income to EBITDA (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2020 | Mar. 31, 2019
Segment Reporting Information [Line Items] |  |
Net income | $ 42,402 | $ 31,555
Interest income, net | (522) | (56)
Income tax expense | 13,255 | 7,700
Depreciation and Amortization | 3,851 | 3,394
Operating Segments [Member] |  |
Segment Reporting Information [Line Items] |  |
Net income | 42,402 | 31,555
Interest income, net | (522) | (56)
Income tax expense | 13,255 | 7,700
Depreciation and Amortization | 3,851 | 3,394
EBITDA | 58,986 | 42,593
Operating Segments [Member] | Residential [Member] |  |
Segment Reporting Information [Line Items] |  |
Net income | 41,020 | 31,255
Interest income, net | (522) | (56)
Income tax expense | 12,788 | 7,600
Depreciation and Amortization | 3,664 | 3,268
EBITDA | 56,950 | 42,067
Operating Segments [Member] | Commercial [Member] |  |
Segment Reporting Information [Line Items] |  |
Net income | 1,382 | 300
Income tax expense | 467 | 100
Depreciation and Amortization | 187 | 126
EBITDA | $ 2,036 | $ 526

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