|
EARNINGS (LOSS) PER SHARE - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
Mar. 31, 2015
|
Dec. 31, 2014
|
|---|---|---|
| 3.0% Convertible Senior Notes Due 2015 | ||
| Debt Instrument [Line Items] | ||
| Convertible senior notes, aggregate principal amount payable | $ 114.4 | $ 114.4 |
| Convertible senior notes, interest rate | 3.00% | 3.00% |
| 1.625% Convertible Senior Notes Due 2019 | ||
| Debt Instrument [Line Items] | ||
| Convertible senior notes, aggregate principal amount payable | $ 402.5 | $ 402.5 |
| Convertible senior notes, interest rate | 1.625% | 1.625% |