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Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Assets
Short-term investments		$ 30,992
Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets
Cash and cash equivalents	$ 89,424	139,465
Short-term investments		30,992
Recurring | Significant Unobservable Inputs (Level 3)
Liabilities
Contingent consideration	1,451	6,922
Recurring | Amount Recorded on Balance Sheet
Assets
Cash and cash equivalents	89,424	139,465
Short-term investments		30,992
Liabilities
Contingent consideration	$ 1,451	$ 6,922

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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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Investments which are intended to be sold in the short term (usually less than one year or the normal operating cycle, whichever is longer) including trading securities, available-for-sale securities, held-to-maturity securities, and other short-term investments not otherwise listed in the existing taxonomy.

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