Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt Activity - Additional Information (Detail)

v2.4.0.8
Long-Term Debt Activity - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
9 Months Ended 9 Months Ended 0 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2014
4.875 % Senior Notes Due May 2023
May 24, 2013
4.875 % Senior Notes Due May 2023
May 24, 2013
8.625% senior note due 2019
Sep. 30, 2014
8.625% senior note due 2019
May 24, 2013
8.625% senior note due 2019
Sep. 30, 2013
8.625% senior note
Jun. 24, 2013
8.625% senior note
Debt Instrument [Line Items]                    
Aggregate principal amount issued         $ 530,000          
Maturity year       2023     2019      
Interest rate         4.875%     8.625%   8.625%
Debt instrument, maturity date       Jun. 01, 2023            
Principal amount of redeemed senior notes at maturity           470,000        
Percentage of debt repayment premium                 112.035%  
Discount on issue                 8,054  
Write off of unamortized debt issuance cost                 7,634  
Early retirement of debt                 56,564  
Loss on early retirement of debt 72,302               50  
Carrying value of long-term debt   1,826,083 1,832,800              
Fair value of long-term debt   $ 1,799,242 $ 1,815,879