XML 48 R38.htm IDEA: XBRL DOCUMENT v3.4.0.3
Debt - Additional Information (Detail)
$ in Thousands, shares in Millions
3 Months Ended
Mar. 31, 2015
USD ($)
shares
Debt Instrument [Line Items]  
Total consideration for repurchase of warrants $ 154,681
3.75% Convertible Senior Notes [Member]  
Debt Instrument [Line Items]  
Warrants repurchased | shares 4.7
Total consideration for repurchase of warrants $ 154,700
Gain (loss) on change in the fair value of the derivative liability $ (20,200)