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Investments (Tables)
9 Months Ended
Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Schedule of unrestricted available-for-sale marketable securities Unrestricted available-for-sale marketable securities held by the Company are as follows, (dollars in thousands):
September 30, 2023December 31, 2022
(unaudited)
Corporate and municipal debt securities
Amortized cost$131,891 $466,333 
Gross unrealized gains14 
Gross unrealized losses(1,563)(4,237)
Total fair value$130,329 $462,110 
Schedule of contractual maturities of the unrestricted available-for-sale marketable securities held The contractual maturities of the unrestricted available-for-sale marketable securities held by the Company are as follows, (dollars in thousands):
September 30,
2023
(unaudited)
Less than 1 year$105,204 
1 year to 2 years25,125 
Total$130,329