Quarterly Financial Information (Unaudited) (Details) - USD ($) $ 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 revenue | $ 133,546 | $ 138,211 | $ 140,498 | $ 141,200 | $ 140,683 | $ 142,765 | $ 143,656 | $ 143,268 | $ 553,455 | $ 570,372 | $ 563,356 |
| Operating income (loss) | 14,647 | 12,896 | (11,848) | 16,609 | 21,101 | 18,486 | 15,258 | 12,804 | $ 32,304 | $ 67,649 | $ 63,725 |
| Net loss | $ (14,642) | $ (25,536) | $ (50,104) | $ (21,013) | $ (16,586) | $ (23,002) | $ (16,509) | $ (20,210) | |||
| X | ||||||||||
- Definition Amount after tax of income (loss) from continuing operations attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|