Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Income Tax Disclosure [Abstract]
Foreign withholding taxes	$ 34,339	$ 30,147
Undistributed earnings	14,510	23,865
Goodwill	30,851	30,851
All other	8,922us-gaap_DeferredTaxLiabilitiesOther	12,471us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities	88,622us-gaap_DeferredTaxLiabilities	97,334us-gaap_DeferredTaxLiabilities
Employee benefit plans	50,977	40,816
Reserves and accruals	14,039	32,248
Deferred income	5,387us-gaap_DeferredTaxAssetsDeferredIncome	4,013us-gaap_DeferredTaxAssetsDeferredIncome
Foreign currency translation	12,167	0
Local currency exchange losses	10,674	207
All other	9,607us-gaap_DeferredTaxAssetsOther	8,612us-gaap_DeferredTaxAssetsOther
Total deferred tax assets	102,851us-gaap_DeferredTaxAssetsGross	85,896us-gaap_DeferredTaxAssetsGross
Valuation allowance	(629)	(1,252)
Net deferred tax assets	$ 102,222us-gaap_DeferredTaxAssetsNet	$ 84,644us-gaap_DeferredTaxAssetsNet

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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The tax effect as of the balance sheet date of the amount of the estimated future tax deductions arising from employee benefit costs not otherwise specified in the taxonomy, which can only be deducted for tax purposes when actual costs are incurred, and which can only be realized if sufficient tax-basis income is generated in future periods to enable the deduction to be taken.

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

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Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances.

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Amount of deferred tax liability attributable to taxable temporary differences from goodwill.

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Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity.

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Deferred Tax Liabilities Foreign Withholding Taxes

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