Fair Value Measurements (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
ASSETS
Cash and cash equivalents	$ 118,993	$ 103,145
Restricted cash	2,419	4,351
Marketable securities	11,592us-gaap_InvestmentsFairValueDisclosure	10,656us-gaap_InvestmentsFairValueDisclosure
Total	133,004us-gaap_AssetsFairValueDisclosure	118,152us-gaap_AssetsFairValueDisclosure
LIABILITIES
Contingent consideration related to acquisitions	16,155	14,913
Total	16,155us-gaap_LiabilitiesFairValueDisclosure	14,913us-gaap_LiabilitiesFairValueDisclosure
Quoted Prices in Active Markets for Identical Assets (Level 1)
ASSETS
Cash and cash equivalents	118,993	103,145
Restricted cash	2,419	4,351
Marketable securities	11,592	10,656
Total	133,004	118,152
LIABILITIES
Contingent consideration related to acquisitions	0	0
Total	0	0
Significant Other Observable Inputs (Level 2)
ASSETS
Cash and cash equivalents	0	0
Restricted cash	0	0
Marketable securities	0	0
Total	0	0
LIABILITIES
Contingent consideration related to acquisitions	0	0
Total	0	0
Unobservable Inputs (Level 3)
ASSETS
Cash and cash equivalents	0	0
Restricted cash	0	0
Marketable securities	0	0
Total	0	0
LIABILITIES
Contingent consideration related to acquisitions	16,155	14,913
Total	$ 16,155	$ 14,913

Restricted cash and cash equivalents fair value disclosure.

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Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of liability recognized arising from contingent consideration in a business combination.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Fair value of financial and nonfinancial obligations.

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