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INVESTMENTS IN DEBT SECURITIES
12 Months Ended
Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]  
INVESTMENTS IN DEBT SECURITIES INVESTMENTS IN DEBT SECURITIES
The Company's short-term and long-term investments as of December 31, 2023 were as follows (in thousands):
Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
Short-term debt securities:
U.S. agency securities$68,778 $— $(1,263)$67,515 
Corporate bonds216,864 96 (1,733)215,227 
Commercial paper15,159 — — 15,159 
Municipal securities9,396 — (231)9,165 
Certificates of deposit3,856 — — 3,856 
U.S. government securities544,145 210 (4,357)539,998 
Foreign government securities1,000 — (19)981 
Total$859,198 $306 $(7,603)$851,901 
Long-term debt securities:
Corporate bonds$94,564 $809 $(45)$95,328 
Municipal securities2,495 55 (138)2,412 
U.S. government securities152,549 875 (37)153,387 
Total$249,608 $1,739 $(220)$251,127 
    
The Company's short-term and long-term investments as of December 31, 2022 are as follows (in thousands):
Amortized CostGross Unrealized GainsGross Unrealized LossesFair Value
Short-term debt securities:
U.S. agency securities$96,545 $16 $(2,120)$94,441 
Corporate bonds368,110 2 (7,475)360,637 
Commercial paper31,503 — — 31,503 
Municipal securities9,884 — (191)9,693 
Certificates of deposit6,400 — — 6,400 
U.S. government securities580,568 6 (8,937)571,637 
Foreign government securities7,795 — (255)7,540 
Total$1,100,805 $24 $(18,978)$1,081,851 
Long-term debt securities:
U.S. agency securities$74,097 $— $(3,782)$70,315 
Corporate bonds245,891 6 (9,171)236,726 
Municipal securities10,415 3 (664)9,754 
U.S. government securities268,902 — (13,210)255,692 
Foreign government securities1,000 — (58)942 
Total$600,305 $9 $(26,885)$573,429 

The amortized cost of investments classified as cash equivalents approximated the fair value due to the short-term nature of the investments.
The Company's gross unrealized losses and fair values for those investments that were in an unrealized loss position as of December 31, 2023 and 2022, aggregated by investment category and the length of time that individual securities have been in a continuous loss position were as follows (in thousands):
December 31, 2023
Less than 12 monthsGreater than 12 monthsTotal
Fair ValueGross Unrealized LossesFair ValueGross Unrealized LossesFair ValueGross Unrealized Losses
Short-term debt securities:
U.S. agency securities$9,770 $(10)$57,745 $(1,253)$67,515 $(1,263)
Corporate bonds61,054 (60)110,706 (1,673)171,760 (1,733)
Municipal securities— — 9,165 (231)9,165 (231)
U.S. government securities80,724 (113)207,183 (4,243)287,907 (4,356)
Foreign government securities— — 981 (19)981 (19)
Total$151,548 $(183)$385,780 $(7,419)$537,328 $(7,602)
Long-term debt securities:
Corporate bonds11,819 (31)2,274 (14)14,093 (45)
Municipal securities976 (24)383 (112)1,359 (136)
U.S. government securities28,474 (37)— — 28,474 (37)
Total$41,269 $(92)$2,657 $(126)$43,926 $(218)

December 31, 2022
Less than 12 monthsGreater than 12 monthsTotal
Fair ValueGross Unrealized LossesFair ValueGross Unrealized LossesFair ValueGross Unrealized Losses
Short-term debt securities:
U.S. agency securities$8,572 $(24)$84,628 $(2,096)$93,200 $(2,120)
Corporate bonds34,795 (423)320,748 (7,052)355,543 (7,475)
Municipal securities587 (13)5,811 (178)6,398 (191)
U.S. government securities146,974 (839)394,880 (8,098)541,854 (8,937)
Foreign government securities— — 7,540 (255)7,540 (255)
Total$190,928 $(1,299)$813,607 $(17,679)$1,004,535 $(18,978)
Long-term debt securities:
U.S. agency securities$11,501 $(20)$58,814 $(3,762)$70,315 $(3,782)
Corporate bonds33,862 (262)201,791 (8,909)235,653 (9,171)
Municipal securities467 (33)8,784 (631)9,251 (664)
U.S. government securities54,405 (590)201,288 (12,620)255,693 (13,210)
Foreign government securities— — 942 (58)942 (58)
Total$100,235 $(905)$471,619 $(25,980)$571,854 $(26,885)

The Company does not intend to sell nor anticipate that it will be required to sell these securities before recovery of the amortized cost basis. Unrealized losses on available-for-sale debt securities were determined not to be related to credit related losses, therefore, an allowance for credit losses is not required.
The contractual maturities of the Company's short-term and long-term investments as of December 31, 2023 were as follows (in thousands):
Amortized CostFair Value
Due in one year or less$859,198 $851,901 
Due in one to five years249,608 251,127 
Total$1,108,806 $1,103,028 
CUSTOMER FUNDS
The following table presents the assets underlying customer funds (in thousands):
December 31,
2023
December 31,
2022
Cash$2,137,634 $1,748,983 
Cash equivalents:
Money market funds4,042 851,296 
Reverse repurchase agreement (i)
1,028,754 580,045 
Total customer funds$3,170,430 $3,180,324 

(i) The Company has accounted for the reverse repurchase agreement with a third party as an overnight lending arrangement, collateralized by the securities subject to the repurchase agreement. The Company classifies the amounts due from the counterparty as cash equivalents due to their short term nature.

The Company does not have any available-for-sale debt securities for which the Company has recorded credit related losses.

The amortized cost of investments classified as cash equivalents approximated the fair value due to the short-term nature of the investments.