COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2016

Commitments and Contingencies Disclosure [Abstract]

Future minimum lease commitments under non-cancelable leases

The future minimum lease commitments under these non-cancelable leases at December 31, 2016 were as follows (in thousands):

Year Ending December 31,
2017	$	15,827
2018	12,678
2019	11,355
2020	7,610
2021	4,525
Thereafter	2,659
Total	$	54,654

Product warranty accrual activity

The following table sets forth the activity in the product warranty accrual account for the years ended December 31, 2016, 2015 and 2014 (in thousands):

Accrual balance at January 1, 2014	$	3,501
Accruals for product warranties	3,985
Cost of warranty claims	(4,694		)
Accrual balance at December 31, 2014	2,792
Accruals for product warranties	3,025
Cost of warranty claims	(3,583		)
Accrual balance at December 31, 2015	2,234
Accruals for product warranties	2,822
Cost of warranty claims	(2,538		)
Accrual balance at December 31, 2016	$	2,518