FAIR VALUE OF CERTAIN FINANCIAL ASSETS AND LIABILITIES (Details 3) (Discounted cash flow, Level 3, Assets at fair value on recurring basis)	9 Months Ended
	Sep. 30, 2013
Auction Rate Securities | Minimum
Quantitative information related to the significant unobservable inputs
Maximum rate probability (as a percent)	0.34%
Principal returned probability (as a percent)	76.72%
Default probability (as a percent)	4.07%
Liquidity risk (as a percent)	3.50%
Recovery rate (as a percent)	60.00%
Auction Rate Securities | Maximum
Quantitative information related to the significant unobservable inputs
Maximum rate probability (as a percent)	2.17%
Principal returned probability (as a percent)	95.14%
Default probability (as a percent)	22.94%
Liquidity risk (as a percent)	3.50%
Recovery rate (as a percent)	60.00%
Auction Rate Securities | Weighted Average
Quantitative information related to the significant unobservable inputs
Maximum rate probability (as a percent)	1.21%
Principal returned probability (as a percent)	86.75%
Default probability (as a percent)	12.04%
Liquidity risk (as a percent)	3.50%
Recovery rate (as a percent)	60.00%
Put Options | Minimum
Quantitative information related to the significant unobservable inputs
Counterparty risk (as a percent)	0.73%
Put Options | Maximum
Quantitative information related to the significant unobservable inputs
Counterparty risk (as a percent)	1.04%
Put Options | Weighted Average
Quantitative information related to the significant unobservable inputs
Counterparty risk (as a percent)	0.83%