Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Additional Information (Detail)

v2.4.0.6
Long-Term Debt - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
1 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended 3 Months Ended
Dec. 14, 2012
Dec. 14, 2012
Secured Debt [Member]
Mar. 31, 2013
Secured Debt [Member]
Dec. 31, 2012
Secured Debt [Member]
Mar. 31, 2013
Revolving Credit Facility [Member]
Dec. 31, 2012
Revolving Credit Facility [Member]
Mar. 31, 2013
9.125% Senior Notes, due April 2018 [Member]
Dec. 31, 2012
9.125% Senior Notes, due April 2018 [Member]
Mar. 22, 2010
9.125% Senior Notes, due April 2018 [Member]
Mar. 31, 2013
9.625% Senior Notes due 2013 [Member]
Mar. 31, 2013
Senior secured revolving credit facility (Revolver) [Member]
Apr. 30, 2012
9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]
Mar. 31, 2013
9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]
Apr. 25, 2012
9.125% Senior Notes, due April 2018 (Issued April 25, 2012) [Member]
May 09, 2012
2.125% Convertible Senior Notes due July 2012 [Member]
Mar. 31, 2013
2.125% Convertible Senior Notes due July 2012 [Member]
2.125% Convertible Senior Notes, due July 2012 Repayment of Debt [Member]
Jul. 15, 2012
2.125% Convertible Senior Notes, due July 2012 [Member]
Mar. 31, 2013
Term Note [Member]
Dec. 14, 2012
Term Note [Member]
Dec. 14, 2012
Term Note [Member]
Secured Debt [Member]
Debt Instrument [Line Items]                                        
Aggregate principal amount                 $ 300.0         $ 125.0            
Percentage of notes guaranteed by restricted subsidiaries             9.125% 9.125%   9.625%           2.125%        
Repayments of debt                   225.0 42.0                  
Par value of senior notes                       104.00%                
Gross proceeds of aggregate principal amount additional issued                       130.0                
Repurchase of Convertible senior notes                             122.9          
Notes paid off                                 2.1      
Debt issuance costs                         11.6              
Debt issuance cost, Net of amortization                         7.2              
Percentage of the aggregate principal amount redeemed             35.00%                          
Percentage of redemption price before notice             109.125%                          
Percentage of redemption price after notice             104.563%                          
Percentage of repurchase             101.00%                          
Redemption date             Apr. 01, 2014                          
Senior secured credit facility   80.0                                   50.0
Increase in the amount of term loan or revolving credit facility   50.0                                    
Aggregate commitment amount 180.0                                      
Maturity of credit facility         Dec. 14, 2017                              
Variation in applicable rate for LIBOR Rate Loan         2.50%                              
Variation in applicable rate for LIBOR Rate Loan         3.00%                              
Variation in applicable rate for Base Rate Loan         1.50%                              
Variation in applicable rate for Base Rate Loan         2.00%                              
Revolving loan outstanding     47.5 50.0 0 0                            
Letters of credit outstanding         2.8 4.5                            
Term Loan                                     50.0  
Principal payments                                   $ 2.5    
Base rate plus     2.00%                                  
LIBOR plus     3.00%