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Supplemental Cash Flow Information (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 12 Months Ended
--- | --- | ---
Nov. 06, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Stockholders' Equity Note [Line Items] |  |  |  |
Cash interest payments |  | $ 384,290 | $ 367,334 | $ 351,430
Net income tax cash payments |  | 130,469 | $ 128,709 | $ 108,295
Cash distributions declared | $ 18,975 |  |  |
Cash dividends declared (in dollars per share) | $ 0.14264 |  |  |
Series A Preferred Stock |  |  |  |
Stockholders' Equity Note [Line Items] |  |  |  |
Preferred stock dividends declared and paid |  | $ 18,052 |  |

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