SUPPLEMENTARY INFORMATION (SCHEDULE II) (Details) (Allowance for Doubtful Accounts [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 100		$ 100		$ 100
Additions Charged to Costs and Expenses	0		0		0
Deductions	0	[1]	0	[1]	0	[1]
Balance at End of Period	$ 100		$ 100		$ 100

[1] Uncollected amounts written off, net of recoveries