Quarterly Financial Information (Unaudited) - Narrative (Details) - USD ($) |
3 Months Ended | 12 Months Ended | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Jul. 12, 2018 |
|
Effect of Fourth Quarter Events [Line Items] | ||||||||||||
Revenues | $ 543,700,000 | $ 516,200,000 | $ 485,500,000 | $ 431,300,000 | $ 491,700,000 | $ 457,600,000 | $ 415,800,000 | $ 389,400,000 | $ 1,976,700,000 | $ 1,754,500,000 | $ 1,554,800,000 | |
Net income (loss) | $ 33,300,000 | $ 46,200,000 | $ 300,000 | $ 10,100,000 | 214,300,000 | $ 12,800,000 | $ (27,600,000) | $ 39,200,000 | 69,100,000 | 160,300,000 | $ (19,700,000) | |
Impairment of intangible assets, finite-lived | 0 | |||||||||||
Loss on early extinguishment on debt | $ 5,400,000 | 11,400,000 | ||||||||||
Senior Secured Second Priority Notes | 2022 Notes | ||||||||||||
Effect of Fourth Quarter Events [Line Items] | ||||||||||||
Principal amount redeemed | 122,000,000 | 122,000,000 | $ 61,000,000 | |||||||||
Senior Secured Second Priority Notes | 2024 Notes | ||||||||||||
Effect of Fourth Quarter Events [Line Items] | ||||||||||||
Principal amount redeemed | $ 125,000,000 | $ 125,000,000 | $ 62,500,000 |