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Property and Equipment - Components of Property and Equipment, Net (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Jan. 01, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment | $ 1,742,592 |  | $ 1,761,071
Less accumulated depreciation | (589,108) |  | (575,720)
Subtotal | 1,153,484 |  | 1,185,351
Less assets held for sale | (22,542) |  | (6,862)
Property and equipment, net | 1,130,942 | $ 1,159,541 | 1,178,489
Land |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment | 382,349 |  | 381,527
Building and improvements |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment | 994,101 |  | 989,872
Software and computer equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment | 97,258 |  | 116,348
Parts and service equipment |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment | 119,895 |  | 108,040
Office equipment and fixtures |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment | 107,392 |  | 96,622
Company vehicles |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment | 9,207 |  | 9,139
Construction in progress |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Property and equipment | $ 32,390 |  | $ 59,523

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