CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data	12 Months Ended
	Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2009
Net revenues	$ 683,602	$ 613,837	$ 674,590
Cost of revenues	321,846	312,767	382,659
Gross profit	361,756	301,070	291,931
Operating expenses:
Research, development and engineering	63,183	57,784	63,840
Selling, general and administrative	163,389	143,784	155,678
Gain from litigation settlement	(5,100)	0	0
Restructuring and other related charges	(428)	1,867	10,952
Total operating expenses	221,044	203,435	230,470
Operating income	140,712	97,635	61,461
Interest and other income (expense), net	(56)	3,105	(3,544)
Income from continuing operations before income taxes	140,656	100,740	57,917
Income tax expense from continuing operations	31,413	24,287	12,575
Income from continuing operations, net of tax	109,243	76,453	45,342
Discontinued operations:
Loss from operations of discontinued AEG segment (including loss on sale)	0	(30,468)	(142,633)
Income tax benefit on discontinued operations	0	(11,393)	(32,392)
Loss on discontinued operations, net of tax	0	(19,075)	(110,241)
Net income (loss)	$ 109,243	$ 57,378	$ (64,899)
Basic
Continuing operations	$ 2.29	$ 1.58	$ 0.93
Discontinued operations	$ 0.00	$ (0.39)	$ (2.27)
Net income (loss)	$ 2.29	$ 1.18	$ (1.34)
Diluted
Continuing operations	$ 2.21	$ 1.55	$ 0.93
Discontinued operations	$ 0.00	$ (0.39)	$ (2.25)
Net income (loss)	$ 2.21	$ 1.16	$ (1.33)
Shares used in basic per share calculations	47,713	48,504	48,589
Shares used in diluted per share calculations	49,344	49,331	48,947
Cash dividends declared per common share	$ 0.20	$ 0.20	$ 0.20