Certain Financial Statement Information Other Current Assets (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Mar. 31, 2014
Schedule of Other current assets
Prepaid expenses	$ 12,843us-gaap_PrepaidExpenseCurrent	$ 10,978us-gaap_PrepaidExpenseCurrent
Executive deferred compensation assets	1,108us-gaap_DeferredCostsCurrent	1,035us-gaap_DeferredCostsCurrent
Proceeds receivable from sale of strategic investment	0	3,353
Other	1,252us-gaap_OtherAssetsMiscellaneousCurrent	1,433us-gaap_OtherAssetsMiscellaneousCurrent
Other current assets, total	$ 15,203us-gaap_OtherAssetsCurrent	$ 16,799us-gaap_OtherAssetsCurrent

Sum of the carrying amounts as of the balance sheet date of deferred costs capitalized at the end of the reporting period that are expected to be charged against earnings within one year or the normal operating cycle, if longer.

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- Definition

An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date(s) within one year of the balance sheet date or the normal operating cycle, whichever is longer. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

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- Definition

Aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Amount of other miscellaneous assets expected to be realized or consumed within one year or operating cycle, if longer.

+ References

No definition available.

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- Definition

Amount of asset related to consideration paid in advance for costs that provide economic benefits within a future period of one year or the normal operating cycle, if longer.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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