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Cash and Cash Equivalents
9 Months Ended
Sep. 30, 2021
Cash and Cash Equivalents [Abstract]  
Cash and Cash Equivalents Cash and Cash Equivalents
The carrying values of the Company’s cash and cash equivalents are as follows:
As of
September 30,
As of December 31,
20212020
(in thousands)
(unaudited)
Cash$63,753 $52,335 
Cash equivalents29,761 53,198 
Restricted cash - letters of credit6,921 7,170 
Total cash and cash equivalents$100,435 $112,703 
The carrying value of the Company’s cash equivalents approximates fair value. See “Note 4 — Fair Value of Financial Instruments”.
Letters of credit are secured by cash held on deposit.