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Borrowings (Tables)
3 Months Ended
Mar. 31, 2022
Debt Disclosure [Abstract]  
Schedule of Debt The following table summarizes our borrowings at March 31, 2022 and December 31, 2021.
March 31, 2022December 31, 2021
(Dollars in thousands)Short-TermLong-TermTotalShort-TermLong-TermTotal
Unsecured borrowings:
Unsecured debt (fixed-rate)$— $986,591 $986,591 $— $986,138 $986,138 
Total unsecured borrowings— 986,591 986,591 — 986,138 986,138 
Secured borrowings:
Private Education Loan term securitizations:
Fixed-rate— 3,608,606 3,608,606 — 3,897,996 3,897,996 
Variable-rate— 957,300 957,300 — 1,046,856 1,046,856 
Total Private Education Loan term securitizations— 4,565,906 4,565,906 — 4,944,852 4,944,852 
Secured Borrowing Facility— — — — — — 
Total secured borrowings— 4,565,906 4,565,906 — 4,944,852 4,944,852 
Total$— $5,552,497 $5,552,497 $— $5,930,990 $5,930,990 
Schedule of Securities Financing Transactions
Secured Financings at Issuance
The following table summarizes our secured financings issued in 2021. There were no secured financings issued in the three months ended March 31, 2022.

IssueDate IssuedTotal Issued
Weighted Average Cost of Funds(1)
Weighted Average Life
 (in years)
(Dollars in thousands)
Private Education Loans:
2021-BMay 2021$531,000 
1-month LIBOR plus 0.77%
4.26
2021-DAugust 2021527,000 
1-month LIBOR plus 0.69%
4.22
2021-ENovember 2021534,000 
1-month LIBOR plus 0.69%
4.15
Total notes issued in 2021$1,592,000 
Total loan and accrued interest amount securitized at inception in 2021(2)
$1,656,263 

(1) Represents LIBOR equivalent cost of funds for floating and fixed-rate bonds, excluding issuance costs.
(2) At March 31, 2022, $1.46 billion of our Private Education Loans, including $1.37 billion of principal and $87 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, 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$— $4,565,906 $4,565,906 $5,650,067 $187,960 $333,325 $6,171,352 
Secured Borrowing Facility— — — — — 298 298 
Total$— $4,565,906 $4,565,906 $5,650,067 $187,960 $333,623 $6,171,650 

.
As of December 31, 2021
(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$— $4,994,852 $4,994,852 $6,029,034 $210,741 $357,982 $6,597,757 
Secured Borrowing Facility— — — — — 867 867 
Total$— $4,994,852 $4,994,852 $6,029,034 $210,741 $358,849 $6,598,624 

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

March 31, 2022
December 31, 2021
(Dollars in thousands)
Debt Interests(1)
Equity Interests(2)
Total Exposure
Debt Interests(1)
Equity Interests(2)
Total Exposure
Private Education Loan term securitizations$230,372 $38,820 $269,192 $192,245 $37,465 $229,710 

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