INTANGIBLE ASSETS WITH FINITE LIVES (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Identifiable intangible assets [Abstract]
Gross Carrying Amount	$ 41,676	$ 41,651
Accumulated Amortization	18,970	15,002
Amortization of identifiable finite-lived intangible assets [Abstract]
Amortization of identifiable intangible assets	3,968	3,915	3,650
Finite-lived intangible assets, future amortization expense [Abstract]
2012	4,000
2013	4,000
2014	4,000
2015	4,000
2016	4,000
Customer Lists [Member]
Identifiable intangible assets [Abstract]
Amortization period (in years)	10	10
Gross Carrying Amount	37,142	37,142
Accumulated Amortization	17,272	13,633
Regulatory Re-registration Costs [Member]
Identifiable intangible assets [Abstract]
Amortization period (in years)	10	10
Gross Carrying Amount	1,302	1,302
Accumulated Amortization	220	90
Patents & Trade Secrets [Member]
Identifiable intangible assets [Abstract]
Amortization period, minimum (in years)	15	15
Amortization period, maximum (in years)	17	17
Gross Carrying Amount	1,571	1,548
Accumulated Amortization	681	599
Trademarks & Trade Names [Member]
Identifiable intangible assets [Abstract]
Amortization period (in years)	17	17
Gross Carrying Amount	907	906
Accumulated Amortization	356	303
Other [Member]
Identifiable intangible assets [Abstract]
Amortization period, minimum (in years)	5	5
Amortization period, maximum (in years)	10	10
Gross Carrying Amount	754	753
Accumulated Amortization	$ 441	$ 377