Long-Term Debt - Summary of Company's Current Debt Portfolio (Detail) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
Jan. 22, 2014 |
Jul. 30, 2013 |
|---|---|---|---|---|
| Debt Instrument [Line Items] | ||||
| Total principal | $ 585,000 | $ 585,000 | ||
| Less: unamortized debt issuance costs | (7,029) | (8,674) | ||
| Total long-term debt | 577,971 | 576,326 | ||
| 6.75% Notes, due July 2022 | ||||
| Debt Instrument [Line Items] | ||||
| Total principal | 360,000 | 360,000 | ||
| Less: unamortized debt issuance costs | $ (4,600) | |||
| Debt instrument fixed interest rate | 6.75% | 6.75% | ||
| 7.50% Senior Notes, due August 2020 | ||||
| Debt Instrument [Line Items] | ||||
| Total principal | $ 225,000 | $ 225,000 | ||
| Less: unamortized debt issuance costs | $ (2,400) | |||
| Debt instrument fixed interest rate | 7.50% | 7.50% |
| X | ||||||||||
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Contractual interest rate for funds borrowed, under the debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|