ACCOUNTS PAYABLE AND ACCRUED LIABILITIES (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
ACCOUNTS PAYABLE AND ACCRUED LIABILITIES [Abstract]
Accounts payable	$ 13,716	$ 15,629
Accrued compensation and related liabilities	15,760	12,169
Accrued interest	324	1,531
Accrued taxes	8,135	5,067
Accrued legal	594	1,808
Accrued Audit and Tax	1,106	963
Accrued warranties	802	1,500
Accrued Royalties	1,608	1,206
Other	8,310	4,901
Total	$ 50,355	$ 44,774