Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Schedule of assets and liabilities measured on a recurring basis, at fair value

	December 31, 2014
	Level 1		Level 2		Level 3		Total
	(in thousands)
U.S. treasuries	$	81,527	$	—	$	—	$	81,527
Corporate debt	—		39,045		—		39,045
Assets held for sale	—		6,000		—		6,000

	December 31, 2013
	Level 1		Level 2		Level 3			Total
	(in thousands)
U.S. treasuries	$	130,977	$	—	$	—		$	130,977
Corporate debt	—		77,601		—			77,601
Government agency securities	—		61,013		—			61,013
Commercial paper	—		11,947		—			11,947
Derivative instrument	—		907		—			907
Contingent consideration	—		—		(29,368		)	(29,368		)

Schedule of the reconciliation of the amount in Level 3

	Contingent
	Consideration
	(in thousands)
Balance as of December 31, 2013	$	(29,368	)
Fair value adjustment	29,368
Balance as of December 31, 2014	$	—

- Definition

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

+ References+ Details