SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Intangible Assets
Intangible assets	$ 14,300	$ 12,518
Accumulated amortization of intangible assets	12,797	10,194
Continuing operations
Intangible Assets
Amortization expense charged to operations	2,618	1,547	1,034
Discontinued operations
Intangible Assets
Amortization expense charged to operations	$ 0	$ 0	$ 7
Minimum
Intangible Assets
Estimated useful lives of intangible assets	6 months
Maximum
Intangible Assets
Estimated useful lives of intangible assets	3 years