|
Long-Term Debt - Summary of Company's Current Debt Portfolio (Detail) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|---|---|---|---|
| Debt Instrument [Line Items] | |||
| Total debt | $ 653,968 | $ 479,205 | $ 482,723 |
| Less current portion | 0 | 10,000 | 145,723 |
| Total long-term debt | 653,968 | 469,205 | 337,000 |
|
9.125% Senior Notes, due April 2018 ( issued march 22, 2010) [Member]
|
|||
| Debt Instrument [Line Items] | |||
| Total debt | 300,000 | 300,000 | |
|
9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]
|
|||
| Debt Instrument [Line Items] | |||
| Total debt | 129,205 | ||
|
2.125% Convertible Senior Notes, due July 2012 [Member]
|
|||
| Debt Instrument [Line Items] | |||
| Total debt | 121,723 | ||
|
Term Note [Member]
|
|||
| Debt Instrument [Line Items] | |||
| Total debt | 50,000 | 61,000 | |
|
7.50% Senior Notes, due August 2020 [Member]
|
|||
| Debt Instrument [Line Items] | |||
| Total debt | 225,000 | 0 | |
|
9.125% Senior Notes, due April 2018 [Member]
|
|||
| Debt Instrument [Line Items] | |||
| Total debt | 428,968 | 429,205 | |
|
Term Note Due December Twenty Seventeen [Member]
|
|||
| Debt Instrument [Line Items] | |||
| Total debt | $ 0 | $ 50,000 |
| X | ||||||||||
|
- Details
|
| X | ||||||||||
|
- Definition
Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. 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 | ||||||||||
|
- Definition
Carrying amount of long-term debt, net of unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. 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 | ||||||||||
|
- Definition
Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). 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
|