DETAILS OF CERTAIN BALANCE SHEET ACCOUNTS (Tables)

6 Months Ended

Sep. 30, 2016

Balance Sheet Related Disclosures [Abstract]

Accounts receivable, net

Accounts receivable, net:

	March 31,			September 30,
(in thousands)	2016			2016
Accounts receivable	$	163,834		$	174,141
Provisions for returns	(7,314		)	(8,559		)
Provisions for promotions, rebates, and other	(27,737		)	(28,095		)
Provisions for doubtful accounts and sales allowances	(564		)	(708		)
Accounts receivable, net	$	128,219		$	136,779

Inventory, net

Inventory, net:

	March 31,		September 30,
(in thousands)	2016		2016
Raw materials	$	21,612	$	23,858
Work in process	527		345
Finished goods	31,023		28,483
Inventory, net	$	53,162	$	52,686

Accrued liabilities

Accrued Liabilities:

	March 31,		September 30,
(in thousands)	2016		2016
Employee compensation and benefits	$	22,955	$	28,044
Accrued interest on 5.50% Senior Notes	10,501		10,387
Warranty obligation	8,537		8,540
VAT/Sales tax payable	4,894		5,143
Restructuring and other related charges	5,783		401
Accrued other	17,364		18,937
Accrued liabilities	$	70,034	$	71,452

Changes in the warranty obligation

Changes in the warranty obligation during the six months ended September 30, 2015 and 2016 were as follows:

	Six Months Ended   September 30,
(in thousands)	2015			2016
Warranty obligation at beginning of period	$	7,717		$	8,537
Warranty provision related to products shipped	4,520			4,649
Deductions for warranty claims processed	(4,257		)	(4,742		)
Adjustments related to preexisting warranties	193			96
Warranty obligation at end of period	$	8,173		$	8,540