Employee Benefits Amounts Showing in Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	$ 3,217	$ (1,769)
Net actuarial losses	(53,837)	(61,609)
Deferred taxes	10,818	11,146
Balance at	(52,232)
Prior service credit (cost)	4,986
Net actuarial gains	7,772
Deferred taxes	(328)
Total change	12,430
Balance at	(39,802)
U.S. and Non-U.S. Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	(516)	(1,946)
Net actuarial losses	(49,819)	(56,806)
Deferred taxes	11,347	11,770
Balance at	(46,982)
Prior service credit (cost)	1,430
Net actuarial gains	6,987
Deferred taxes	(423)
Total change	7,994
Balance at	(38,988)
U.S. and Non-U.S. Post-retirement [Member]
Defined Benefit Plan Disclosure [Line Items]
Prior service credit (cost)	3,733	177
Net actuarial losses	(4,018)	(4,803)
Deferred taxes	(529)	$ (624)
Balance at	(5,250)
Prior service credit (cost)	3,556
Net actuarial gains	785
Deferred taxes	95
Total change	4,436
Balance at	$ (814)