Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Net Income (Loss) Attributable to Parent	$ 30,354	$ 28,731
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	(98)	7
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	(175)	(270)
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	(14,178)	9,313
total comprehensive income loss net of tax	(14,451)	9,050
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 15,903	$ 37,781