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Selected Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Quarterly Financial Information Disclosure [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net Revenues | $ 595,088 | $ 591,542 | $ 604,124 | $ 610,065 | $ 558,649 | $ 535,173 | $ 548,784 | $ 556,653 | $ 2,400,819 | $ 2,199,259 | $ 2,214,831
Operating Income (Loss) | 80,477 | 78,940 | 89,554 | 94,830 | 29,726 | 67,881 | 80,439 | 82,362 | 343,801 | 260,408 | 271,584
Income from continuing operations, net of tax | 82,073 | 23,157 | 27,692 | 35,076 | 10,581 | 164,197 | 11,257 | 21,666 | 167,998 | 207,701 | 11,068
Income from discontinued operations, net of tax | 0 | 0 | 21,017 | 375 | 1,478 | 180,707 | 18,715 | 11,630 | 21,392 | 212,530 | 36,539
Net Income (Loss) Attributable to Parent | $ 82,073 | $ 23,157 | $ 48,709 | $ 35,451 | $ 12,059 | $ 344,904 | $ 29,972 | $ 33,296 | $ 189,390 | $ 420,231 | $ 47,607
Continuing operations | $ 0.72 | $ 0.20 | $ 0.24 | $ 0.31 | $ 0.09 | $ 1.43 | $ 0.10 | $ 0.19 | $ 1.46 | $ 1.81 | $ 0.10
Discontinued operations | 0.00 | 0 | 0.18 | 0.00 | 0.01 | 1.58 | 0.16 | 0.10 | 0.19 | 1.86 | 0.32
Basic net income per common share | 0.72 | 0.20 | 0.42 | 0.31 | 0.10 | 3.01 | 0.26 | 0.29 | 1.65 | 3.67 | 0.42
Continuing operations | 0.71 | 0.20 | 0.24 | 0.31 | 0.09 | 1.43 | 0.10 | 0.19 | 1.45 | 1.80 | 0.10
Discontinued operations | 0.00 | 0 | 0.18 | 0.00 | 0.01 | 1.57 | 0.16 | 0.10 | 0.19 | 1.85 | 0.32
Diluted net income per common share | $ 0.71 | $ 0.20 | $ 0.42 | $ 0.31 | $ 0.10 | $ 3.00 | $ 0.26 | $ 0.29 | $ 1.64 | $ 3.65 | $ 0.42

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