Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net Income (Loss) Attributable to Parent	$ 40,145	$ 29,564	$ 70,499	$ 58,295
Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	80	(261)	(18)	(255)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	(184)	(270)	(359)	(539)
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	8,946	(23,266)	(5,232)	(13,953)
total comprehensive income loss net of tax	8,842	(23,797)	(5,609)	(14,747)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 48,987	$ 5,767	$ 64,890	$ 43,548