INVESTMENTS, AVAILABLE-FOR-SALE SECURITIES (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	$ 0	$ 0
Available-for-sale Securities, Gross Realized Gains	0	0	0
Available-for-sale Securities, Gross Realized Losses	0	0	0
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost	23,517,000	23,604,000
Gross Unrealized Gains	411,000	101,000
Gross Unrealized Losses	(1,938,000)	(2,006,000)
Available-for-sale investments	21,990,000	21,699,000
Available-for-sale securities, unrealized loss positions
Aggregate Fair Value	21,137,000	21,156,000
Government-Sponsored Enterprise Obligations [Member]
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost		37,000
Gross Unrealized Gains		0
Gross Unrealized Losses	0	0
Available-for-sale investments		37,000
Available-for-sale securities, unrealized loss positions
Aggregate Fair Value	0	37,000
Auction Rate Securities [Member]
Available-for-sale Securities Reconciliation [Abstract]
Amortized Cost	23,517,000	23,567,000
Gross Unrealized Gains	411,000	101,000
Gross Unrealized Losses	(1,938,000)	(2,006,000)
Available-for-sale investments	21,990,000	21,662,000
Available-for-sale securities, unrealized loss positions
Aggregate Fair Value	$ 21,137,000	$ 21,119,000