GOODWILL AND INTANGIBLE ASSETS (Details 2) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Intangible assets with definite lives
Cost	83,803	83,803
Accumulated Amortization	(82,969)	(82,756)
Net	834	1,047
Purchase agreements
Intangible assets with definite lives
Cost	50,411	50,411
Accumulated Amortization	(50,317)	(50,293)
Net	94	118
Purchase agreements | Weighted average
Intangible assets with definite lives
Amortization Life (in years)	5 years	5 years
Technology
Intangible assets with definite lives
Cost	25,194	25,194
Accumulated Amortization	(25,106)	(25,034)
Net	88	160
Technology | Weighted average
Intangible assets with definite lives
Amortization Life (in years)	3 years	3 years
Customer lists
Intangible assets with definite lives
Cost	6,682	6,682
Accumulated Amortization	(6,075)	(6,045)
Net	607	637
Customer lists | Weighted average
Intangible assets with definite lives
Amortization Life (in years)	4 years 2 months 12 days	4 years 2 months 12 days
Other
Intangible assets with definite lives
Cost	1,516	1,516
Accumulated Amortization	(1,471)	(1,384)
Net	45	132
Other | Weighted average
Intangible assets with definite lives
Amortization Life (in years)	2 years 6 months	2 years 6 months