Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Fair Value Assets Measured on Recurring Basis

The composition of our financial assets and liabilities among the three Levels of the fair value hierarchy are as follows (in thousands):

	September 30, 2016
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds (1)	$	434,399	$	—	$	—	$	434,399
U.S. government and government agency debt securities		—		3,001		—		3,001
Corporate debt securities (1)		—		290,724		—		290,724
Total	$	434,399	$	293,725	$	—	$	728,124
Liabilities:
Contingent consideration	$	—	$	—	$	1,986	$	1,986

	December 31, 2015
	Level 1		Level 2		Level 3		Total
Assets:
Money market funds (1)	$	362,587	$	—	$	—	$	362,587
U.S. government and government agency debt securities		—		184,975		—		184,975
Corporate debt securities (1)		—		277,193		—		277,193
Total	$	362,587	$	462,168	$	—	$	824,755
Liabilities:
Contingent consideration	$	—	$	—	$	18,490	$	18,490

⁽¹⁾ Includes amounts classified as cash and cash equivalents.

Fair Value Liabilities Measured on Recurring Basis

The following table presents the activity for the nine months ended September 30, 2016 related to our Level 3 liabilities (in thousands):

Level 3 Liabilities:	Rising Tide			Zindagi			PuzzleSocial		Total
Contingent consideration –  December 31, 2015	$	18,490		$	—		$	—	$	18,490
Additions		—			1,260			406		1,666
Fair value adjustments		(17,090	)		(1,080	)		—		(18,170	)
Contingent consideration –  September 30, 2016	$	1,400		$	180		$	406	$	1,986