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Fair Value of Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2015

Fair Value of Financial Instruments [Abstract]

Summary of Fair Value Measurement Financial Asset and Liabilities

Financial assets and liabilities subject to fair value measurements were as follows (in thousands):

	Fair Value Measurements at September 30, 2015
					Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs				Significant Unobservable Inputs
	Total				Level 1				Level 2				Level 3
Assets:
Cash and cash equivalents		$	114,721			$	114,721			$	—			$	—
Money market funds			251,046				251,046				—				—
Total Assets		$	365,767			$	365,767			$	—			$	—

	Fair Value Measurements at December 31, 2014
					Quoted Prices in Active Markets for Identical Assets				Significant Other Observable Inputs				Significant Unobservable Inputs
	Total				Level 1				Level 2				Level 3
Assets:
Cash and cash equivalents		$	131,545			$	131,545			$	—			$	—
Money market funds			26,046				26,046				—				—
Restricted cash			300				300				—				—
Total Assets		$	157,891			$	157,891			$	—			$	—