| CONSOLIDATED STATEMENTS OF OPERATIONS (Parenthetical) (Class B common stock [Member]) In Millions, unless otherwise specified | 1 Months Ended | 
|---|---|
| Mar. 31, 2010 | |
| Class B common stock [Member] | |
| Preferred stock converted to common stock | 14.5 | 
| X | ||||||||||
| 
- Definition Preferred Stock Converted To Common Stock No definition available. 
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