Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2015

Fair Value Measurements

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

	Fair Value Measurements at March 31, 2015 Using:
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Assets:
Money market funds	$	193,868	$	193,868	$	—	$	—
Corporate debt securities	62,567		—		62,567		—
Commercial paper	30,461		—		30,461		—
Certificates of deposit	14,999		—		14,999		—
Municipal securities	9,311		—		9,311		—
Total Assets	$	311,206	$	193,868	$	117,338	$	—
Liabilities:
Contingent consideration - Lumara Health	$	209,037	$	—	$	—	$	209,037
Contingent consideration - MuGard	12,222		—		—		12,222
Total Liabilities	$	221,259	$	—	$	—	$	221,259

	Fair Value Measurements at December 31, 2014 Using:
			Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs		Significant Unobservable Inputs
	Total		(Level 1)		(Level 2)		(Level 3)
Assets:
Money market funds	$	77,254	$	77,254	$	—	$	—
Corporate debt securities	24,890		—		24,890		—
Total Assets	$	102,144	$	77,254	$	24,890	$	—
Liabilities:
Contingent consideration - Lumara Health	$	206,600	$	—	$	—	$	206,600
Contingent consideration - MuGard	12,102		—		—		12,102
Total Liabilities	$	218,702	$	—	$	—	$	218,702

Schedule of reconciliation of contingent consideration obligations related to acquisitions measured on recurring basis using Level 3 inputs

Balance as of December 31, 2014	$	218,702
Payments made	(84		)
Adjustments to fair value of contingent consideration	2,599
Other adjustments	42
Balance as of March 31, 2015	$	221,259