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Reportable Segments - Reconciliation of Net Income to Gross Margin (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Segment Reporting [Abstract] |  |  |  |
Net income (loss) | $ (4,233) | $ 42,158 | $ 44,641 | $ 97,915
Selling, general and administrative | 82,124 | 94,806 | 252,684 | 283,096
Depreciation and amortization | 94,924 | 98,256 | 285,057 | 295,734
Long-lived asset impairment | 23,708 | 12,385 | 51,860 | 26,039
Restructuring and other charges | 11,998 | 219 | 36,392 | 5,394
Interest expense | 28,577 | 25,737 | 84,273 | 86,767
Equity in income of non-consolidated affiliates | (5,084) | (4,951) | (15,152) | (14,553)
Other (income) expense, net | 30,129 | 4,663 | 38,975 | (1,442)
Provision for (benefit from) income taxes | (3,605) | 11,215 | 14,628 | 31,494
Income from discontinued operations, net of tax | (18,776) | (18,003) | (37,743) | (54,499)
Gross margin | $ 239,762 | $ 266,485 | $ 755,615 | $ 755,945

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