Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Schedule of financial assets subject to fair value measurements

	As of March 31, 2013		Level 1		Level 2		Level 3
	(In thousands)
Money market funds and cash equivalents	$	75,552	$	75,552	$	—	$	—
Marketable securities	106,750		—		106,750		—
	$	182,302	$	75,552	$	106,750	$	—

	As of December 31, 2012		Level 1		Level 2		Level 3
	(In thousands)
Money market funds and cash equivalents	$	18,688	$	18,688	$	—	$	—
Marketable securities	59,065		—		59,065		—
	$	77,753	$	18,688	$	59,065	$	—

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References+ Details