INVESTMENTS IN SUBSIDIARIES ACQUISITION OF OMNIMETRIX - Intangible Assets Acquired (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	12 Months Ended
	Feb. 15, 2012	Dec. 31, 2012	Dec. 31, 2013 OmniMetrix technologies [Member]	Dec. 31, 2013 Customer Relationships [Member]	Dec. 31, 2013 Noncompete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Omnimetrix technologies	$ 2,319
Finite-Lived Customer Relationships, Gross	3,236
Finite-Lived Noncompete Agreements, Gross	26
Acquired Finite-lived Intangible Asset, Amount	$ 5,581	$ 5,581
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			10 years	14 years	6 years