Quarterly Results (Unaudited) (Tables)

12 Months Ended

Mar. 31, 2012

20. Quarterly Results (Unaudited) [Abstract]

Effect of Fourth Quarter Events [Table Text Block]

QUARTERLY RESULTS (UNAUDITED)

Quarters Ended	March 31,			December 31,			September 30,			June 30,
Fiscal 2012 (1)
Revenues:
Product	$	263,211		$	239,403		$	223,502		$	202,013
Service	127,038			115,812			119,205			116,626
Total Revenues	390,249			355,215			342,707			318,639
Cost of Revenues:
Product	149,781			145,976			138,805			117,433
Service	76,243			71,233			70,593			68,281
Total Cost of Revenues	226,024			217,209			209,398			185,714
Gross Profit	164,225			138,006			133,309			132,925
Percentage of Revenues	42.1		%	38.9		%	38.9		%	41.7		%
Restructuring Expenses	(877		)	1,164			99			258
Net Income	$	44,171		$	33,649		$	29,564		$	28,731
Basic Income Per Common Share:
Net income	$	0.77		$	0.58		$	0.50		$	0.48
Diluted Income Per Common Share:
Net income	$	0.76		$	0.58		$	0.50		$	0.48
Fiscal 2011 (2)
Revenues:
Product	$	256,852		$	212,622		$	197,092		$	77,272
Service	120,908			115,661			115,333			111,708
Total Revenues	377,760			328,283			312,425			188,980
Cost of Revenues:
Product	153,770			123,381			110,736			106,576
Service	67,963			67,888			66,634			64,338
Total Cost of Revenues	221,733			191,269			177,370			170,914
Gross Profit	156,027			137,014			135,055			18,066
Percentage of Revenues	41.3		%	41.7		%	43.2		%	9.6		%
Restructuring Expenses	779			(23		)	105			341
Net Income	$	39,000		$	21,765		$	35,711		$	(45,210	)
Basic Income Per Common Share:
Net income	$	0.66		$	0.37		$	0.60		$	(0.76	)
Diluted Income Per Common Share:
Net income	$	0.65		$	0.36		$	0.59		$	(0.76	)

(1)    The fiscal 2012 quarter ended March 31 includes the impact of the SYSTEM 1 Rebate Program as a $15,306 increase in product revenues and a $2,097 decrease in product cost of revenues.

(2)    The fiscal 2011 quarter ended June 30 includes the impact of the SYSTEM 1 Rebate Program as a $102,313 reduction in product revenues and a $7,691 increase in product cost of revenues. The fiscal 2011 quarter ended December 31 includes the impact of the class action settlement as a $19,796 increase in selling, general and administrative expenses.