Income Taxes - Balance Sheet Classification (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Deferred Tax Assets, Net, Classification [Abstract]
Net current deferred tax assets	$ 8,300	$ 8,312
Net current deferred tax liabilities	(158)us-gaap_DeferredTaxLiabilitiesCurrent	(324)us-gaap_DeferredTaxLiabilitiesCurrent
Net non-current deferred tax assets	28,695	23,406
Net non-current deferred tax liabilities	(2,786)	(5,967)
Net deferred tax assets (liabilities)	$ 34,051us-gaap_DeferredTaxAssetsLiabilitiesNet	$ 25,427us-gaap_DeferredTaxAssetsLiabilitiesNet

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, before jurisdictional netting.

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Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, netted by jurisdiction and classified as current.

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, netted by jurisdiction and classified as current.

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, netted by jurisdiction and classified as noncurrent.

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