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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2020
Fair Value Measurements  
Schedule of assets measured at fair value on a recurring basis

As of December 31, 2020, the Company held certain assets that are required to be measured at fair value on a recurring basis. Assets measured at fair value on a recurring basis are summarized below (in thousands):

Fair Value Measurements as of December 31, 2020

    

Total

    

Level 1

    

Level 2

    

Level 3

 

Marketable Securities

Bonds and bond funds

$

117,928

$

$

117,928

$

Commercial paper

 

492,257

 

 

492,257

 

$

610,185

$

$

610,185

$

Cash, Cash Equivalents and Restricted Cash

215,723

 

215,723

 

 

Total Assets Measured at Fair Value

$

825,908

$

215,723

$

610,185

$

Fair Value Measurements as of December 31, 2019

 

Total

Level 1

Level 2

Level 3

 

Marketable Securities

    

    

    

    

    

    

    

    

Bonds and bond funds

$

267,243

$

$

267,243

$

Commercial paper

 

165,723

 

 

165,723

 

$

432,966

$

$

432,966

$

Cash, Cash Equivalents and Restricted Cash

87,206

 

87,206

 

 

Total Assets Measured at Fair Value

$

520,172

$

87,206

$

432,966

$