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Debt - Additional Information (Details) € in Millions, $ in Millions |  |  |  |  | 7 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) | Jun. 12, 2019 USD ($) | Jun. 05, 2019 USD ($) | Dec. 10, 2012 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2019 CAD ($) | Dec. 31, 2019 EUR (€) | May 31, 2019 USD ($) payment | Jun. 30, 2016 USD ($) | Nov. 30, 2012 USD ($)
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from borrowings, classified as financing activities |  |  |  |  |  | $ 494,000,000 | $ 0 |  |  |  |  |
Borrowings | $ 479,732,000 |  |  |  | $ 479,732,000 | 479,732,000 | 595,977,000 |  |  |  |  |
Restricted cash released |  |  |  |  |  | 10,700,000 |  |  |  |  |  |
Senior Secured Notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  | $ 300,000,000 |  |  |  |  |  |  |  |  |
Borrowings, issuance percentage |  |  | 98.00% |  |  |  |  |  |  |  |  |
Notes issued coupon rate (as a percent) |  |  | 9.50% |  |  |  |  |  |  |  |  |
Proceeds from borrowings, classified as financing activities |  |  | $ 287,100,000 |  |  | 294,000,000 |  |  |  |  |  |
Borrowings | 287,568,000 |  |  |  | 287,568,000 | 287,568,000 | 0 |  |  |  |  |
Revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  |  | $ 250,000,000 |  | $ 375,000,000
Borrowings | 64,500,000 |  |  |  | $ 64,500,000 | $ 64,500,000 |  | $ 0.4 | € 57.6 |  |  |
Restricted cash released | $ 10,700,000 |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis spread on LIBOR rate (as a percent) | 1.8333% |  |  |  | 1.8333% | 1.8333% |  | 1.8333% | 1.8333% |  |  |
Loan undrawn standby fee (as a percent) | 0.6875% |  |  |  |  |  |  |  |  |  |  |
Current prepaid expenses | $ 2,865,000 |  |  |  | $ 2,865,000 | $ 2,865,000 | 749,000 |  |  |  |  |
Revolving credit facility | Amended and restated credit agreement |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  |  |  | $ 250,000,000 |
Additional borrowing capacity |  |  |  |  |  |  |  |  |  |  | $ 100,000,000 |
Senior Secured Credit Facility |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  |  |  |  | 450,000,000 |  |
Term loan |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | 200,000,000 |  |  |  | 200,000,000 | 200,000,000 |  |  |  | $ 200,000,000 |  |
Proceeds from borrowings, classified as financing activities |  |  |  |  |  | 200,000,000 |  |  |  |  |  |
Borrowings | $ 197,761,000 |  |  |  | $ 197,761,000 | $ 197,761,000 | 0 |  |  |  |  |
Number of payments on borrowings | payment |  |  |  |  |  |  |  |  |  | 6 |  |
Borrowings, interest rate basis spread on LIBOR rate (as a percent) | 2.75% |  |  |  | 2.75% | 2.75% |  | 2.75% | 2.75% |  |  |
Senior notes |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  | $ 600,000,000 |  |  |  |  |  |  |  |
Notes issued coupon rate (as a percent) | 9.50% |  |  | 6.125% | 9.50% | 9.50% |  | 9.50% | 9.50% |  |  |
Borrowings maturity date |  |  |  | Dec. 15, 2020 |  |  |  |  |  |  |  |
Payments for accrued interest |  | $ 18,069,000 |  |  |  |  |  |  |  |  |  |
Interest and financing costs incurred |  | $ 3,035,000 |  |  |  |  |  |  |  |  |  |
Original issue discount | Senior Secured Notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 6,000,000 |  |  |  |  |  |  |  |  |
Commission payment and certain transaction costs | Senior Secured Notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | 6,903,000 |  |  |  |  |  |  |  |  |
Transaction costs | Senior Secured Notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  | $ 2,681,000 |  |  |  |  |  |  |  |  |
Transaction costs | Term loan |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  |  | $ 2,666,000 |  |
Fees | Revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  |  | 3,333,000 |  |
Unamortized deferred financing costs | Revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings |  |  |  |  |  |  |  |  |  | $ 524,000 |  |
Top of range | Revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis spread on LIBOR rate (as a percent) | 2.25% |  |  |  | 2.25% | 2.25% |  | 2.25% | 2.25% |  |  |
Top of range | Term loan |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis spread on LIBOR rate (as a percent) | 2.25% |  |  |  | 2.25% | 2.25% |  | 2.25% | 2.25% |  |  |
Bottom of range | Revolving credit facility |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis spread on LIBOR rate (as a percent) | 3.25% |  |  |  | 3.25% | 3.25% |  | 3.25% | 3.25% |  |  |
Bottom of range | Term loan |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate basis spread on LIBOR rate (as a percent) | 3.25% |  |  |  | 3.25% | 3.25% |  | 3.25% | 3.25% |  |  |
Prior to December 1, 2021 | Senior Secured Notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Percentage of aggregate principal amount of borrowings (as a percent) |  |  | 100.00% |  |  |  |  |  |  |  |  |
Premium percentage of principal amount of borrowings (as a percent) |  |  | 1.00% |  |  |  |  |  |  |  |  |
Borrowings, additional basis points |  |  | 0.50% |  |  |  |  |  |  |  |  |
Percentage of original principal amount of borrowings (as a percent) |  |  | 35.00% |  |  |  |  |  |  |  |  |
Redemption percentage of aggregate principal amount of borrowings (as a percent) |  |  | 109.50% |  |  |  |  |  |  |  |  |
December 1, 2021 | Senior Secured Notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption percentage of aggregate principal amount of borrowings (as a percent) |  |  | 107.125% |  |  |  |  |  |  |  |  |
After December 1, 2022 | Senior Secured Notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Redemption percentage of aggregate principal amount of borrowings (as a percent) |  |  | 100.00% |  |  |  |  |  |  |  |  |
Fair value |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Derivative financial assets | $ 5,597,000 |  |  |  | $ 5,597,000 | $ 5,597,000 | $ 0 |  |  |  |  |
Fair value | Senior Secured Notes due 2024 |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount | 324,000,000 |  |  |  | 324,000,000 | 324,000,000 |  |  |  |  |  |
Derivative financial assets |  |  | $ 1,373,000 |  |  |  |  |  |  |  |  |
Gains on change in fair value of derivatives |  |  |  |  | 4,224,000 |  |  |  |  |  |  |
Fair value | Term loan |  |  |  |  |  |  |  |  |  |  |  |
Disclosure Of Borrowings [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Borrowings | $ 200,000,000 |  |  |  | $ 200,000,000 | $ 200,000,000 |  |  |  |  |  |

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