Note 11 Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss) Net Of Tax	$ 5,029	$ (3,093)
Other Comprehensive Income (Loss), Net of Tax	8,122	(5,183)	(5,673)
Foreign Currency [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss) Net Of Tax	10,535	2,982	6,472
Other Comprehensive Income Loss Before Reclassifications, Net of Tax	7,553	(3,490)
Reclassification from Accumulated Other Comprehensive Income,Current Period, Net of Tax	0	0
Other Comprehensive Income (Loss), Net of Tax	7,553	(3,490)
Unrealized Gains (Losses) on Securities [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss) Net Of Tax	325	60	(68)
Other Comprehensive Income Loss Before Reclassifications, Net of Tax	361	(672)
Reclassification from Accumulated Other Comprehensive Income,Current Period, Net of Tax	(96)	800
Other Comprehensive Income (Loss), Net of Tax	265	128
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss) Net Of Tax	(5,831)	(6,135)	(4,314)
Other Comprehensive Income Loss Before Reclassifications, Net of Tax	89	(1,957)
Reclassification from Accumulated Other Comprehensive Income,Current Period, Net of Tax	215	136
Other Comprehensive Income (Loss), Net of Tax	304	(1,821)
Accumulated Other Comprehensive Income (Loss) [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income (Loss) Net Of Tax	5,029	(3,093)	2,090
Other Comprehensive Income Loss Before Reclassifications, Net of Tax	8,003	(6,119)
Reclassification from Accumulated Other Comprehensive Income,Current Period, Net of Tax	119	936
Other Comprehensive Income (Loss), Net of Tax	$ 8,122	$ (5,183)	$ (5,673)