DISCONTINUED OPERATIONS (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Jul. 02, 2012	Jul. 02, 2012 Assets Held for Sale Intangibles [Member]	Jun. 30, 2012 Assets Held for Sale Intangibles [Member]	Jul. 02, 2012 Numark Industries, L.P. [Member]	Jul. 02, 2012 Corel Corporation [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash portion of sales price	$ 0	$ 11,440,000
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	0	37,972,000
Current Assets Held For Sale Proceeds From Sale			14,800,000		14,841,000	11,800,000	3,000,000
Disposal Group, Including Discontinued Operation, Other Assets					(23,000)
Disposal Group Including Discontinued Operation Capitalized Software					(372,000)
Disposal Group, Including Discontinued Operation, Deferred Revenue					45,401,000
Disposal Group Including Discontinued Operation Warranty Accrual					507,000
Disposal Group, Including Discontinued Operation, Inventory					(16,500,000)
Disposal Group Including Discontinued Operation Fixed Assets					(507,000)
Assets of Disposal Group, Including Discontinued Operation			25,000,000		25,032,000
Net Book Value Of Assets Held For Sale			38,000,000		37,972,000
Amortizing intangible assets sold					(3,474,000)
Assets Held For Sale Costs To Sell				(1,901,000)
Current Assets Held For Sale Proceeds From Sale			$ 13,300,000			$ 10,900,000	$ 2,400,000