GOODWILL AND OTHER INTANGIBLE ASSETS (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Intangible assets
Gross Carrying Amount	$ 90,634,000		$ 85,396,000
Accumulated Amortization	(29,267,000)		(27,375,000)
Net Carrying Amount	61,367,000		58,021,000
Amortization expense	1,800,000	1,700,000
Weighted average life of the additions to customer lists, patents and other intangibles	6 years
Trade Name
Intangible assets
Gross Carrying Amount	11,825,000		10,023,000
Accumulated Amortization	(380,000)		(264,000)
Net Carrying Amount	11,445,000		9,759,000
Trade Name | Minimum
Intangible assets
Amortization period	1 year
Trade Name | Maximum
Intangible assets
Amortization period	3 years
Customer Lists
Intangible assets
Gross Carrying Amount	50,263,000		46,932,000
Accumulated Amortization	(12,715,000)		(11,627,000)
Net Carrying Amount	37,548,000		35,305,000
Customer Lists | Minimum
Intangible assets
Amortization period	10 years
Customer Lists | Maximum
Intangible assets
Amortization period	14 years
Patents and Other Intangibles
Intangible assets
Gross Carrying Amount	28,546,000		28,441,000
Accumulated Amortization	(16,172,000)		(15,484,000)
Net Carrying Amount	$ 12,374,000		$ 12,957,000
Patents
Intangible assets
Amortization period	5 years