Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Foreign withholding taxes	$ 39,770	$ 34,339
Undistributed earnings	19,553	14,510
Goodwill	30,851	30,851
All other	10,424	8,922
Total deferred tax liabilities	100,598	88,622
Employee benefit plans	43,362	50,977
Reserves and accruals	12,911	14,039
Deferred income	3,938	5,387
Currency translation losses of foreign subsidiaries	9,939	12,167
Local currency exchange losses of foreign subsidiaries	3,597	10,674
Foreign tax credit carryforward	4,664	0
All other	16,546	9,607
Total deferred tax assets	94,957	102,851
Valuation allowance	0	(629)
Net deferred tax assets	$ 94,957	$ 102,222