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Segments - Certain Segment Financial Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Total revenues | $ 10,086,510 | $ 8,678,157 | $ 7,864,252
Income before income taxes | 347,069 | 283,523 | 262,704
Depreciation and amortization | (57,722) | (49,369) | (41,600)
Other interest expense | (34,776) | (23,207) | (19,491)
Other (expense) income, net | 12,195 | (6,103) | (1,006)
Interest Expense [Abstract] |  |  |
Loss on cash flow hedges | 39,336 | 25,531 | 19,534
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 10,088,675 | 8,674,730 | 7,860,464
Income before income taxes | 260,006 | 247,881 | 250,287
Interest Expense [Abstract] |  |  |
Loss on cash flow hedges | 81,961 | 56,109 | 45,116
Operating Segments | Domestic |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 3,845,830 | 3,381,715 | 3,038,883
Income before income taxes | 105,208 | 106,210 | 115,145
Interest Expense [Abstract] |  |  |
Loss on cash flow hedges | 37,196 | 26,445 | 21,061
Operating Segments | Import |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 4,432,760 | 3,764,255 | 3,330,949
Income before income taxes | 117,776 | 110,204 | 98,751
Interest Expense [Abstract] |  |  |
Loss on cash flow hedges | 29,009 | 18,665 | 14,959
Operating Segments | Luxury |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | 1,810,085 | 1,528,760 | 1,490,632
Income before income taxes | 37,022 | 31,467 | 36,391
Interest Expense [Abstract] |  |  |
Loss on cash flow hedges | 15,756 | 10,999 | 9,096
Corporate And Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Total revenues | (2,165) | 3,427 | 3,788
Income before income taxes | 167,366 | 114,321 | 74,514
Interest Expense [Abstract] |  |  |
Loss on cash flow hedges | (42,625) | (30,578) | (25,582)
Segment Reconciling Items |  |  |
Segment Reporting Information [Line Items] |  |  |
Depreciation and amortization | (57,722) | (49,369) | (41,600)
Other interest expense | (34,776) | (23,207) | (19,491)
Other (expense) income, net | $ 12,195 | $ (6,103) | $ (1,006)

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