CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Parenthetical) (USD $) In Thousands | 3 Months Ended | 9 Months Ended |
|---|---|---|
Sep. 30, 2011 | Sep. 30, 2011 | |
| CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) (Parenthetical) | ||
| Changes in fair value of derivative, tax | $ 67 | $ 261 |