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INVESTMENT SECURITIES (Tables)
9 Months Ended
Sep. 30, 2022
INVESTMENT SECURITIES  
Schedule of held-to-maturity securities

The following tables summarize our investment securities at September 30, 2022 and December 31, 2021:

September 30, 2022

  Amortized

  Gross

  Gross

cost, as

unrealized

unrealized

  Estimated

(in thousands)

    

adjusted

    

holding gains

    

holding losses

    

fair value

Short-term investments:

 

  

 

  

 

  

 

  

Obligations of domestic governmental agencies (maturing between October 2022 and September 2023) (held-to-maturity)

$

66,082

$

$

924

$

65,158

Long-term investments:

 

 

  

 

  

 

  

Obligations of domestic governmental agencies (maturing between October 2023 and February 2024) (held-to-maturity)

21,766

824

20,942

Total short-term and long-term investment securities

$

87,848

$

$

1,748

$

86,100

December 31, 2021

    

Amortized

    

Gross

    

Gross

    

cost, as

unrealized

unrealized

Estimated fair

adjusted

holding gains

holding losses

value

Short-term investments:

 

  

 

  

 

  

 

  

Obligations of domestic governmental agencies (maturing between January 2022 and April 2022) (held-to-maturity)

$

15,876

$

$

4

$

15,872

Long-term investments:

Obligations of domestic governmental agencies (maturing between February 2023 and June 2023) (held-to-maturity)

35,533

160

35,373

Total short-term and long-term investment securities

$

51,409

$

$

164

$

51,245