COMMITMENTS AND CONTINGENCIES 2 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Activity related to the product warranty liability
Balance at beginning of period	$ 4,629	$ 5,724	$ 4,832	$ 5,746
Accrual for warranties during the period, net of change in estimates	301	1,336	788	2,623
Actual costs incurred	(859)	(1,395)	(1,549)	(2,704)
Balance at end of period	$ 4,071	$ 5,665	$ 4,071	$ 5,665
Minimum
Product Warranties
Product Warranty Period			30 days
Maximum
Product Warranties
Product Warranty Period			3 years