ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Details 2) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income (expense)	$ 1,872
Unrealized holding gains on available-for-sale investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other income (expense)	$ 1,872