Annual report pursuant to Section 13 and 15(d)

Long-Term Debt - Summary of Company's Current Debt Portfolio (Detail)

v2.4.0.6
Long-Term Debt - Summary of Company's Current Debt Portfolio (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Debt Instrument [Line Items]    
Debt $ 479,205 $ 482,723
Less current portion 10,000 145,723
Total long-term debt 469,205 337,000
9.125% Senior Notes, due April 2018 (Issued March 22, 2010) [Member]
   
Debt Instrument [Line Items]    
Debt 300,000 300,000
9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]
   
Debt Instrument [Line Items]    
Debt 129,205  
2.125% Convertible Senior Notes, due July 2012 [Member]
   
Debt Instrument [Line Items]    
Debt   121,723
Term Note [Member]
   
Debt Instrument [Line Items]    
Debt $ 50,000 $ 61,000