RESERVES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Allowance for Doubtful Accounts
Change in balance
Balance at Beginning of Period	$ 519	$ 460
Additions	212	90
Deductions	(469)	(31)
Balance at End of Period	262	519
Reserve for Environmental Liability
Change in balance
Balance at Beginning of Period	866	1,187
Additions		4
Deductions	(191)	(325)
Balance at End of Period	$ 675	$ 866