Total Fair Value | Fair Value Measurements at Reporting Date Using | ||||||||||||||
Level 1 | Level 2 | Level 3 | |||||||||||||
As of December 31, 2013 | |||||||||||||||
Cash Equivalents and Marketable Securities: | |||||||||||||||
Money market funds | $ | 40,482 | $ | 40,482 | $ | — | $ | — | |||||||
Certificates of deposit | 3,418 | 3,418 | — | — | |||||||||||
Commercial paper | 29,999 | — | 29,999 | — | |||||||||||
U.S. government agency obligations | 174,948 | — | 174,948 | — | |||||||||||
Corporate bonds | 737,861 | — | 737,861 | — | |||||||||||
$ | 986,708 | $ | 43,900 | $ | 942,808 | $ | — | ||||||||
Other Assets: | |||||||||||||||
Note receivable | $ | 22,879 | $ | — | $ | — | $ | 22,879 | |||||||
Other Liabilities: | |||||||||||||||
Contingent consideration obligation related to Velocius acquisition | $ | (2,600 | ) | $ | — | $ | — | $ | (2,600 | ) | |||||
As of December 31, 2012 | |||||||||||||||
Cash Equivalents and Marketable Securities: | |||||||||||||||
Money market funds | $ | 22,255 | $ | 22,255 | $ | — | $ | — | |||||||
Certificates of deposit | 7,473 | 7,473 | — | — | |||||||||||
Commercial paper | 9,482 | — | 9,482 | — | |||||||||||
U.S. government agency obligations | 189,674 | — | 189,674 | — | |||||||||||
Corporate bonds | 692,995 | — | 692,995 | — | |||||||||||
$ | 921,879 | $ | 29,728 | $ | 892,151 | $ | — | ||||||||
Other Liabilities: | |||||||||||||||
Contingent consideration obligation related to Verivue acquisition | $ | (1,200 | ) | $ | — | $ | — | $ | (1,200 | ) | |||||