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Segment Information - Summary of Reportable Operating Segment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Segment Reporting Information [Line Items] |  |  |  |
Total consolidated revenues | $ 2,382,312 | $ 2,423,740 | $ 4,616,939 | $ 4,659,256
Total segment income (loss) | 50,355 | 37,785 | 86,224 | 74,503
Interest expense, other, net | (12,205) | (13,054) | (24,544) | (26,274)
Other income (expense), net | 6 | 10 | 110 | 100
Income (loss) from continuing operations before taxes | 38,156 | 24,741 | 61,790 | 48,329
Franchised Dealerships [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total consolidated revenues | 2,352,840 | 2,402,764 | 4,563,425 | 4,622,594
Total segment income (loss) | 53,561 | 41,714 | 92,854 | 84,785
Echo Park [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total consolidated revenues | 29,472 | 20,976 | 53,514 | 36,662
Total segment income (loss) | $ (3,206) | $ (3,929) | $ (6,630) | $ (10,282)

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- Definition The net amount of other income and expense amounts, the components of which are not separately disclosed on the income statement, resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income (expense) recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) net gains or losses on securities, (d) unusual costs, (e) gains or losses on foreign exchange transactions, and (f) miscellaneous other income and expense items. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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