CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Income Statement [Abstract]
Net revenues	$ 223,106	$ 206,358
Cost of revenues	110,033	99,000
Gross profit	113,073	107,358
Operating expenses:
Research, development, and engineering	22,344	23,194
Selling, general, and administrative	55,787	55,678
(Gain) loss, net from litigation settlements	4,739	(876)
Restructuring and other related charges	(1,048)	0
Total operating expenses	81,822	77,996
Operating income	31,251	29,362
Interest expense	(7,288)	(2,741)
Other non-operating income and (expense), net	2,352	(285)
Income before income taxes	26,315	26,336
Income tax expense	5,928	5,108
Net income	$ 20,387	$ 21,228
Earnings per common share:
Basic (in dollars per share)	$ 0.63	$ 0.56
Diluted (in dollars per share)	$ 0.62	$ 0.55
Shares used in computing basic earnings per common share	32,243	38,002
Shares used in computing diluted earnings per common share	32,818	38,943
Cash dividends declared per common share (in dollars per share)	$ 0.15	$ 0.15