TRANSACTIONS WITH THIRD PARTY Interest Income Related to Semi South (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Cost-method Investments [Line Items]
Interest income on note from SemiSouth	$ 1,747	$ 2,054	$ 2,096
Non-cash interest income on note from SemiSouth	1,445	0	0
Semi South [Member]
Schedule of Cost-method Investments [Line Items]
Interest income on note from SemiSouth	90	0	0
Non-cash interest income on note from SemiSouth	665	0	0
Interest income from SemiSouth lease line	79	98	0
Interest income from SemiSouth	$ 834	$ 98	$ 0