ACCOUNTS RECEIVABLE (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011
Less:
Accounts receivable, net	$ 89,180,000	$ 104,305,000
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	108,357,000	120,290,000
Less:
Allowance for doubtful accounts	(1,972,000)	(2,342,000)
Allowance for sales returns and rebates	(17,205,000)	(13,643,000)
Large solution sales and certain distributor sales excluded from accounts receivable	5,700,000	10,300,000
2012 Divestitures, Estimated Sales Returns [Member] | Trade Accounts Receivable [Member]
Less:
Allowance for sales returns and rebates	$ 2,800,000