Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Foreign withholding taxes	$ 25,987	$ 44,702
Undistributed earnings	8,636	24,629
Goodwill	19,529	30,851
All other	9,039	11,015
Total deferred tax liabilities	63,191	111,197
Employee benefit plans	21,714	38,804
Reserves and accruals	9,673	11,756
Deferred income	4,878	4,672
Currency translation losses of foreign subsidiaries	1,993	13,244
Local currency exchange losses of foreign subsidiaries	843	3,669
Foreign tax credit carryforward	0	2,799
All other	6,522	14,327
Total deferred tax assets	45,623	89,271
Valuation allowance	(1,040)	(636)
Net deferred tax assets	$ 44,583	$ 88,635

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32621-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 25
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=96869850&loc=d3e28680-109314

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32632-109319