COMMITMENTS AND CONTINGENCIES (Tables)

6 Months Ended

Jun. 30, 2014

Commitments and Contingencies Disclosure [Abstract]

Summary of the activity related to the product warranty liability

The following table summarizes the activity related to the product warranty liability:

	Three Months Ended						Six Months Ended
	June 30, 2014			June 30, 2013			June 30, 2014			June 30, 2013
	(in thousands)
Balance at beginning of period	$	3,749		$	4,629		$	3,686		$	4,832
Accrual for warranties during the period, net	899			301			1,845			788
Actual costs incurred	(896		)	(859		)	(1,779		)	(1,549		)
Balance at end of period	$	3,752		$	4,071		$	3,752		$	4,071