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Borrowings (Tables)
3 Months Ended
Mar. 31, 2023
Debt Disclosure [Abstract]  
Schedule of Debt The following table summarizes our borrowings at March 31, 2023 and December 31, 2022.
March 31, 2023December 31, 2022
(Dollars in thousands)Short-TermLong-TermTotalShort-TermLong-TermTotal
Unsecured borrowings:
Unsecured debt (fixed-rate)$— $989,788 $989,788 $— $988,986 $988,986 
Total unsecured borrowings— 989,788 989,788 — 988,986 988,986 
Secured borrowings:
Private Education Loan term securitizations:
Fixed-rate— 3,759,190 3,759,190 — 3,462,363 3,462,363 
Variable-rate— 764,998 764,998 — 783,765 783,765 
Total Private Education Loan term securitizations— 4,524,188 4,524,188 — 4,246,128 4,246,128 
Secured Borrowing Facility— — — — — — 
Total secured borrowings— 4,524,188 4,524,188 — 4,246,128 4,246,128 
Total$— $5,513,976 $5,513,976 $— $5,235,114 $5,235,114 
Schedule of Securities Financing Transactions
The following table summarizes our secured financings issued in the year ended December 31, 2022 and in the three months ended March 31, 2023.

IssueDate IssuedTotal Issued
Weighted Average Cost of Funds(1)
Weighted Average Life
 (in years)
(Dollars in thousands)
Private Education Loans:
2022-CAugust 2022$575,000 
SOFR plus 1.76%
4.69
Total notes issued in 2022$575,000 
Total loan and accrued interest amount securitized at inception in 2022(2)
$674,387 
2023-AMarch 2023$579,000 
SOFR plus 1.53%
5.06
Total notes issued in 2023$579,000 
Total loan and accrued interest amount securitized at inception in 2023(3)
$644,573 


(1) Represents SOFR equivalent cost of funds for floating and fixed-rate bonds, excluding issuance costs.
(2) At March 31, 2023, $610 million of our Private Education Loans, including $572 million of principal and $38 million in capitalized interest, were encumbered related to these transactions.
(3) At March 31, 2023, $639 million of our Private Education Loans, including $598 million of principal and $41 million in capitalized interest, were encumbered related to these transactions.
Schedule of Variable Interest Entities
We consolidate our financing entities that are VIEs as a result of our being the entities’ primary beneficiary. As a result, these financing VIEs are accounted for as secured borrowings.

As of March 31, 2023
(dollars in thousands)
Debt OutstandingCarrying Amount of Assets Securing Debt Outstanding
Short-TermLong-TermTotalLoansRestricted Cash
Other Assets(1)
Total
Secured borrowings:
Private Education Loan term securitizations$— $4,524,188 $4,524,188 $5,728,010 $181,764 $322,715 $6,232,489 
Secured Borrowing Facility— — — — — 360 360 
Total$— $4,524,188 $4,524,188 $5,728,010 $181,764 $323,075 $6,232,849 

As of December 31, 2022
(dollars in thousands)
Debt OutstandingCarrying Amount of Assets Securing Debt Outstanding
Short-TermLong-TermTotalLoansRestricted Cash
Other
Assets(1)
Total
Secured borrowings:
Private Education Loan term securitizations$— $4,246,128 $4,246,128 $5,433,602 $156,719 $286,093 $5,876,414 
Secured Borrowing Facility— — — — — 1,066 1,066 
Total$— $4,246,128 $4,246,128 $5,433,602 $156,719 $287,159 $5,877,480 

(1) Other assets primarily represent accrued interest receivable.
The table below provides a summary of our exposure related to our unconsolidated VIEs.

March 31, 2023
December 31, 2022
(Dollars in thousands)
Debt Interests(1)
Equity Interests(2)
Total Exposure
Debt Interests(1)
Equity Interests(2)
Total Exposure
Private Education Loan term securitizations$317,077 $51,342 $368,419 $329,188 $50,786 $379,974 

(1) Vertical risk retention interest classified as available-for-sale investment.
(2) Vertical risk retention interest classified as trading investment.