GOODWILL AND INTANGIBLE ASSETS (Schedule of Other Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Finite Lived And Indefinite Intangible Assets [Line Items]
Gross carrying value	$ 75,471	$ 75,837
Accumulated Amortization	(68,495)	(68,453)
Net carrying value	6,976	7,384
Customer Lists [Member]
Finite Lived And Indefinite Intangible Assets [Line Items]
Gross carrying value	65,507	65,888
Accumulated Amortization	(60,859)	(60,957)
Net carrying value	4,648	4,931
Non-compete Agreements [Member]
Finite Lived And Indefinite Intangible Assets [Line Items]
Gross carrying value	5,717	5,756
Accumulated Amortization	(5,611)	(5,593)
Net carrying value	106	163
Developed Technology [Member]
Finite Lived And Indefinite Intangible Assets [Line Items]
Gross carrying value	1,000	1,000
Accumulated Amortization	(1,000)	(1,000)
Net carrying value
Other [Member]
Finite Lived And Indefinite Intangible Assets [Line Items]
Gross carrying value	3,247	3,193
Accumulated Amortization	(1,025)	(903)
Net carrying value	$ 2,222	$ 2,290