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v3.23.2

Segment Information - Reconciliation of gross margin to income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Reconciliation of total gross margin to income |  |  |  |
Total gross margin | $ 136,167 | $ 105,763 | $ 252,611 | $ 209,825
Less: |  |  |  |
Selling, general and administrative | 28,649 | 27,691 | 55,074 | 55,464
Depreciation and amortization | 41,210 | 41,356 | 81,391 | 84,395
Long-lived and other asset impairment | 2,892 | 4,647 | 5,461 | 12,063
Restructuring charges | (85) |  | 962 |
Interest expense | 28,630 | 24,456 | 55,211 | 49,702
Gain on sale of assets, net | (1,176) | (18,948) | (4,781) | (21,060)
Other expense (income), net | 1,463 | 497 | 2,066 | 533
Income before income taxes | $ 34,584 | $ 26,064 | $ 57,227 | $ 28,728

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