Employee Benefits Amounts Showing in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	$ (1,769)	$ (678)
Net actuarial losses	(61,609)	(46,968)
Deferred taxes	11,146	10,960
Balance at	(36,686)
Prior service credit (cost)	(1,091)
Net actuarial gains	(14,641)
Deferred taxes	186
Total change	(15,546)
Balance at	(52,232)
U.S. and Non-U.S. Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	(1,946)	(2,142)
Net actuarial losses	(56,806)	(42,092)
Deferred taxes	11,770	11,551
Balance at	(32,683)
Prior service credit (cost)	196
Net actuarial gains	(14,714)
Deferred taxes	219
Total change	(14,299)
Balance at	(46,982)
U.S. and Non-U.S. Post-retirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	177	1,464
Net actuarial losses	(4,803)	(4,876)
Deferred taxes	(624)	$ (591)
Balance at	(4,003)
Prior service credit (cost)	(1,287)
Net actuarial gains	73
Deferred taxes	(33)
Total change	(1,247)
Balance at	$ (5,250)