Note 10 Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Mar. 31, 2011
Changes in Accumulated Other Comprehensive Income by Component [Line Items]
Accumulated Other Comprehensive Income Loss Net Of Tax	$ (3,093)		$ 2,090
Other Comprehensive Income (Loss), Net of Tax	(5,183)		(5,673)		5,883
Foreign Currency [Member]
Changes in Accumulated Other Comprehensive Income by Component [Line Items]
Accumulated Other Comprehensive Income Loss Net Of Tax	2,982		6,472		10,721
Unrealized Gains (Losses) on Securities [Member]
Changes in Accumulated Other Comprehensive Income by Component [Line Items]
Accumulated Other Comprehensive Income Loss Net Of Tax	60	[1]	(68)	[1]	(13)	[1]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities, Tax	31		(37)		(7)
Defined Benefit Pension Plans [Member]
Changes in Accumulated Other Comprehensive Income by Component [Line Items]
Accumulated Other Comprehensive Income Loss Net Of Tax	(6,135)	[2]	(4,314)	[2]	(2,945)	[2]
Accumulated Other Comprehensive Loss, Pension, Tax	(1,941)		(1,523)		(1,108)
Accumulated Other Comprehensive Income (Loss) [Member]
Changes in Accumulated Other Comprehensive Income by Component [Line Items]
Accumulated Other Comprehensive Income Loss Net Of Tax	(3,093)		2,090		7,763
Other Comprehensive Income, Foreign Currency [Member]
Changes in Accumulated Other Comprehensive Income by Component [Line Items]
Other Comprehensive Income (Loss), Net of Tax	(3,490)		(4,249)
Other Comprehensive Income, Unrealized Gains (Losses) on Securities [Member]
Changes in Accumulated Other Comprehensive Income by Component [Line Items]
Other Comprehensive Income (Loss), Net of Tax	128		(55)
Other Comprehensive Income, Defined Benefit Pension Plans [Member]
Changes in Accumulated Other Comprehensive Income by Component [Line Items]
Other Comprehensive Income (Loss), Net of Tax	$ (1,821)		$ (1,369)

[1] Net of taxes of $31 in 2013, $(37) in 2012 and $(7) in 2011.

[2] Net of taxes of $(1,941) in 2013, $(1,523) in 2012 and $ $(1,108) in 2011.