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Business Acquisitions and Dispositions - Revenues and Other Activities Associated with Disposed Dealerships That Remain in Continuing Operations (Details) - Disposed dealerships that remain in continuing operations - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Income (loss) from operations | $ (3,300) | $ (14,400) | $ (8,300) | $ (28,000)
Gain (loss) on disposal | 300 | 20,700 | (1,400) | 20,700
Lease exit accrual adjustments and charges | (4,200) | 2,400 | (6,500) | 4,100
Pre-tax income (loss) | 1,200 | (42,100) | (3,200) | (57,400)
Total revenues | 600 | 161,900 | 16,000 | 367,000
Impairment of Long-Lived Assets to be Disposed of | $ 0 | $ (46,000) | $ 0 | $ (46,000)

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