COMMITMENTS AND CONTINGENCIES (Tables)

3 Months Ended

Mar. 31, 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
	March 31, 2014			March 31, 2013
	(in thousands)
Balance at beginning of period	$	3,686		$	4,832
Accrual for warranties during the period, net	946			487
Actual costs incurred	(883		)	(690		)
Balance at end of period	$	3,749		$	4,629