Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Losses attributable to redeemable noncontrolling interests	$ 1,429	$ 170
Pension funded status adjustment, tax benefit expense	1,195	1,841	794
Net unrealized gain (loss) on derivative instruments, tax benefit expense	1,134	1,909	5,251
Foreign currency translation adjustment, related to redeemable noncontrolling interests	$ 1,159	$ 36