Long-Term Debt - 6.75% Senior Secured Notes - Additional Information (Detail) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
Dec. 31, 2017 |
Dec. 31, 2018 |
May 19, 2017 |
|
| Debt Instrument [Line Items] | |||||||
| Interest payable, current | $ 1,341 | $ 1,341 | $ 1,375 | ||||
| Debt related commitment fees and debt issuance costs | $ 6,300 | ||||||
| Debt Instrument Redemption Period Two [Member] | |||||||
| Debt Instrument [Line Items] | |||||||
| Debt instrument, redemption, percentage of aggregate principal amount | 35.00% | ||||||
| Debt instrument, redemption price, percentage of principal amount redeemed | 106.75% | ||||||
| Debt Instrument Redemption Period Three [Member] | |||||||
| Debt Instrument [Line Items] | |||||||
| Debt instrument, redemption, percentage of aggregate principal amount | 10.00% | ||||||
| Debt instrument, redemption price, percentage of principal amount redeemed | 103.00% | ||||||
| Debt Instrument Redemption Period One [Member] | |||||||
| Debt Instrument [Line Items] | |||||||
| Debt instrument, redemption price, percentage of principal amount redeemed | 100.00% | ||||||
| 6.75% Senior Secured Notes [Member] | |||||||
| Debt Instrument [Line Items] | |||||||
| Debt instrument, interest rate, stated percentage | 6.75% | 6.75% | 6.75% | ||||
| Debt instrument, debt default, description of violation or event of default | The Indenture provides for the following events of default (each, an “Event of Default”): (i) default in payment of principal or premium on the Notes at maturity, upon repurchase, acceleration, optional redemption or otherwise; (ii) default for 30 days in payment of interest on the Notes; (iii) the failure by us or certain restricted subsidiaries to comply with other agreements in the Indenture or the Notes, in certain cases subject to notice and lapse of time; (iv) the failure of any guarantee by certain significant Subsidiary Guarantors to be in full force and effect and enforceable in accordance with its terms, subject to notice and lapse of time; (v) certain accelerations (including failure to pay within any grace period) of other indebtedness of ours or any restricted subsidiary if the amount accelerated (or so unpaid) is at least $15 million; (vi) certain judgments for the payment of money in excess of $15 million; (vii) certain events of bankruptcy or insolvency with respect to us or any significant subsidiary; and (vii) certain defaults with respect to any collateral having a fair market value in excess of $15 million. | ||||||
| Debt instrument debt default percentage | 25.00% | ||||||
| Interest expense, debt | $ 15,400 | ||||||
| Interest payable, current | $ 1,300 | 1,300 | |||||
| Debt related commitment fees and debt issuance costs | $ 200 | $ 300 | $ 400 | $ 500 | |||