CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Revenues:
Product	$ 239,403	$ 212,622	$ 664,918	$ 486,986
Service	115,812	115,661	351,643	342,702
Total revenues	355,215	328,283	1,016,561	829,688
Cost of revenues:
Product	145,976	123,381	402,214	340,693
Service	71,233	67,888	210,107	198,860
Total cost of revenues	217,209	191,269	612,321	539,553
Gross Profit	138,006	137,014	404,240	290,135
Operating expenses:
Selling, general, and administrative	73,922	93,467	227,583	237,583
Research and development	9,196	7,739	26,867	24,391
Restructuring expenses	1,164	(23)	1,522	423
Total operating expenses	84,282	101,183	255,972	262,397
Income from operations	53,724	35,831	148,268	27,738
Non-operating expenses, net:
Interest expense	3,005	3,049	9,083	9,052
Interest income and miscellaneous expense	(373)	(321)	(948)	(671)
Total non-operating expenses, net	2,632	2,728	8,135	8,381
Income before income tax expense (benefit)	51,092	33,103	140,133	19,357
Income tax expense	17,443	11,338	48,189	7,091
Net income	$ 33,649	$ 21,765	$ 91,944	$ 12,266
Net income per common share
Basic	$ 0.58	$ 0.37	$ 1.57	$ 0.21
Diluted	$ 0.58	$ 0.36	$ 1.55	$ 0.2
Cash dividends declared per common share outstanding	$ 0.17	$ 0.15	$ 0.49	$ 0.41