Allowance for Credit Losses - Age Analysis of Past Due Loans Delinquencies (Details) - USD ($)
$ in Thousands |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2023 |
Jun. 30, 2023 |
Mar. 31, 2023 |
Dec. 31, 2022 |
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
|
|
|
|
| Private Education Loans allowance for losses |
$ (1,269,652)
|
$ (1,350,058)
|
$ (1,339,772)
|
$ (1,364,716)
|
$ (1,479,306)
|
$ (1,357,075)
|
| Private Education Loans, net |
$ 18,915,333
|
|
$ 20,306,357
|
|
|
|
| Percentage of Private Education Loans in repayment, Year 1 |
52.00%
|
|
55.60%
|
|
|
|
| Percentage of Private Education Loans in repayment, Year 2 |
57.80%
|
|
65.30%
|
|
|
|
| Percentage of Private Education Loans in repayment, Year 3 |
69.20%
|
|
75.20%
|
|
|
|
| Percentage of Private Education Loans in repayment, Year 4 |
77.60%
|
|
81.10%
|
|
|
|
| Percentage of Private Education Loans in repayment, Year 5 |
82.60%
|
|
85.00%
|
|
|
|
| Percentage of Private Education Loans in repayment, After Year 5 |
89.10%
|
|
89.30%
|
|
|
|
| Percentage of Private Education Loans in repayment |
72.50%
|
|
73.30%
|
|
|
|
| Delinquent Private Education Loans in repayment as a percentage of Private Education Loans in repayment, Year 1 |
0.50%
|
|
1.00%
|
|
|
|
| Delinquent Private Education Loans in repayment as a percentage of Private Education Loans in repayment, Year 2 |
1.10%
|
|
2.10%
|
|
|
|
| Delinquent Private Education Loans in repayment as a percentage of Private Education Loans in repayment, Year 3 |
2.90%
|
|
3.60%
|
|
|
|
| Delinquent Private Education Loans in repayment as a percentage of Private Education Loans in repayment, Year 4 |
3.50%
|
|
4.10%
|
|
|
|
| Delinquent Private Education Loans in repayment as a percentage of Private Education Loans in repayment, Year 5 |
3.50%
|
|
4.50%
|
|
|
|
| Delinquent Private Education Loans in repayment as a percentage of Private Education Loans in repayment, After Year 5 |
5.20%
|
|
6.80%
|
|
|
|
| Delinquent Private Education Loans in repayment as a percentage of Private Education Loans in repayment |
3.30%
|
|
3.90%
|
|
|
|
| Loans in forbearance as a percentage of loans in repayment and forbearance, Year 1 |
0.30%
|
|
0.80%
|
|
|
|
| Loans in forbearance as a percentage of loans in repayment and forbearance, Year 2 |
1.10%
|
|
2.70%
|
|
|
|
| Loans in forbearance as a percentage of loans in repayment and forbearance, Year 3 |
2.60%
|
|
2.60%
|
|
|
|
| Loans in forbearance as a percentage of loans in repayment and forbearance, Year 4 |
2.10%
|
|
2.30%
|
|
|
|
| Loans in forbearance as a percentage of loans in repayment and forbearance, Year 5 |
2.00%
|
|
2.20%
|
|
|
|
| Loans in forbearance as a percentage of loans in repayment and forbearance, After Year 5 |
1.90%
|
|
1.90%
|
|
|
|
| Loans in forbearance as a percentage of loans in repayment and forbearance |
1.80%
|
|
2.10%
|
|
|
|
| Consumer Portfolio Segment | Student Loan |
|
|
|
|
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
|
|
|
|
| Total Private Education Loans in Repayment, Year 1 |
$ 769,857
|
|
$ 2,494,814
|
|
|
|
| Total Private Education Loans in Repayment, Year 2 |
3,134,870
|
|
3,323,327
|
|
|
|
| Total Private Education Loans in Repayment, Year 3 |
2,281,790
|
|
2,209,734
|
|
|
|
| Total Private Education Loans in Repayment, Year 4 |
1,688,961
|
|
1,475,858
|
|
|
|
| Total Private Education Loans in Repayment, Year 5 |
1,215,583
|
|
1,386,889
|
|
|
|
| Total Private Education Loans in Repayment, After Year 5 |
5,140,520
|
|
4,519,192
|
|
|
|
| Total Private Education Loans in repayment |
14,231,581
|
|
15,409,814
|
|
|
|
| Total Private Education Loans, gross, Year 1 |
1,480,348
|
|
4,490,119
|
|
|
|
| Total Private Education Loans, gross, Year 2 |
5,423,019
|
|
5,088,739
|
|
|
|
| Total Private Education Loans, gross, Year 3 |
3,297,769
|
|
2,937,422
|
|
|
|
| Total Private Education Loans, gross, Year 4 |
2,177,720
|
|
1,819,089
|
|
|
|
| Total Private Education Loans, gross, Year 5 |
1,472,239
|
|
1,632,300
|
|
|
|
| Total Private Education Loans, gross, After Year 5 |
5,768,436
|
|
5,058,175
|
|
|
|
| Total Private Education Loans, gross |
19,619,531
|
|
21,025,844
|
|
|
|
| Private Education Loans deferred origination costs and unamortized premium/(discount), Year 1 |
17,774
|
|
35,616
|
|
|
|
| Private Education Loans deferred origination costs and unamortized premium/(discount), Year 2 |
27,568
|
|
18,556
|
|
|
|
| Private Education Loans deferred origination costs and unamortized premium/(discount), Year 3 |
11,897
|
|
9,465
|
|
|
|
| Private Education Loans deferred origination costs and unamortized premium/(discount), Year 4 |
6,845
|
|
5,809
|
|
|
|
| Private Education Loans deferred origination costs and unamortized premium/(discount), Year 5 |
4,575
|
|
3,556
|
|
|
|
| Private Education Loans deferred origination costs and unamortized premium/(discount), After Year 5 |
10,002
|
|
8,552
|
|
|
|
| Private Education Loans deferred origination costs and unamortized premium/(discount) |
78,661
|
|
81,554
|
|
|
|
| Total Private Education Loans, Year 1 |
1,498,122
|
|
4,525,735
|
|
|
|
| Total Private Education Loans, Year 2 |
5,450,587
|
|
5,107,295
|
|
|
|
| Total Private Education Loans, Year 3 |
3,309,666
|
|
2,946,887
|
|
|
|
| Total Private Education Loans, Year 4 |
2,184,565
|
|
1,824,898
|
|
|
|
| Total Private Education Loans, Year 5 |
1,476,814
|
|
1,635,856
|
|
|
|
| Total Private Education Loans, After Year 5 |
5,778,438
|
|
5,066,727
|
|
|
|
| Total Private Education Loans |
19,698,192
|
|
21,107,398
|
|
|
|
| Private Education Loans allowance for losses, Year 1 |
(80,912)
|
|
(269,642)
|
|
|
|
| Private Education Loans allowance for losses, Year 2 |
(304,066)
|
|
(335,090)
|
|
|
|
| Private Education Loans allowance for losses, Year 3 |
(228,421)
|
|
(194,104)
|
|
|
|
| Private Education Loans allowance for losses, Year 4 |
(152,123)
|
|
(118,755)
|
|
|
|
| Private Education Loans allowance for losses, Year 5 |
(94,330)
|
|
(100,111)
|
|
|
|
| Private Education Loans allowance for losses, After Year 5 |
(405,740)
|
|
(317,403)
|
|
|
|
| Private Education Loans allowance for losses |
(1,265,592)
|
|
(1,335,105)
|
|
|
|
| Private Education Loans, net, Year 1 |
1,417,210
|
|
4,256,093
|
|
|
|
| Private Education Loans, net, Year 2 |
5,146,521
|
|
4,772,205
|
|
|
|
| Private Education Loans, net, Year 3 |
3,081,245
|
|
2,752,783
|
|
|
|
| Private Education Loans, net, Year 4 |
2,032,442
|
|
1,706,143
|
|
|
|
| Private Education Loans, net, Year 5 |
1,382,484
|
|
1,535,745
|
|
|
|
| Private Education Loans, net, After Year 5 |
5,372,698
|
|
4,749,324
|
|
|
|
| Private Education Loans, net |
18,432,600
|
|
19,772,293
|
|
|
|
| Consumer Portfolio Segment | Student Loan | Loan delinquent, current |
|
|
|
|
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
|
|
|
|
| Year 1 |
765,729
|
|
2,469,817
|
|
|
|
| Year 2 |
3,100,292
|
|
3,254,534
|
|
|
|
| Year 3 |
2,215,133
|
|
2,131,040
|
|
|
|
| Year 4 |
1,630,195
|
|
1,416,069
|
|
|
|
| Year 5 |
1,172,591
|
|
1,323,825
|
|
|
|
| After Year 5 |
4,872,598
|
|
4,213,986
|
|
|
|
| Loan type |
13,756,538
|
|
14,809,271
|
|
|
|
| Consumer Portfolio Segment | Student Loan | Loan delinquent 30-59 days |
|
|
|
|
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
|
|
|
|
| Year 1 |
2,542
|
|
17,599
|
|
|
|
| Year 2 |
18,637
|
|
34,627
|
|
|
|
| Year 3 |
29,618
|
|
37,147
|
|
|
|
| Year 4 |
27,766
|
|
28,020
|
|
|
|
| Year 5 |
19,455
|
|
31,432
|
|
|
|
| After Year 5 |
126,427
|
|
149,926
|
|
|
|
| Loan type |
224,445
|
|
298,751
|
|
|
|
| Consumer Portfolio Segment | Student Loan | Loan delinquent 60-89 days |
|
|
|
|
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
|
|
|
|
| Year 1 |
759
|
|
5,720
|
|
|
|
| Year 2 |
9,069
|
|
17,227
|
|
|
|
| Year 3 |
19,011
|
|
20,077
|
|
|
|
| Year 4 |
15,343
|
|
16,614
|
|
|
|
| Year 5 |
11,809
|
|
15,482
|
|
|
|
| After Year 5 |
69,393
|
|
75,897
|
|
|
|
| Loan type |
125,384
|
|
151,017
|
|
|
|
| Consumer Portfolio Segment | Student Loan | Loan delinquent 90 days or greater past due |
|
|
|
|
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
|
|
|
|
| Year 1 |
827
|
|
1,678
|
|
|
|
| Year 2 |
6,872
|
|
16,939
|
|
|
|
| Year 3 |
18,028
|
|
21,470
|
|
|
|
| Year 4 |
15,657
|
|
15,155
|
|
|
|
| Year 5 |
11,728
|
|
16,150
|
|
|
|
| After Year 5 |
72,102
|
|
79,383
|
|
|
|
| Loan type |
125,214
|
|
150,775
|
|
|
|
| Loans In-School/Grace/Deferment | Consumer Portfolio Segment | Student Loan |
|
|
|
|
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
|
|
|
|
| Year 1 |
708,196
|
|
1,976,040
|
|
|
|
| Year 2 |
2,254,427
|
|
1,672,333
|
|
|
|
| Year 3 |
955,723
|
|
669,250
|
|
|
|
| Year 4 |
452,970
|
|
307,781
|
|
|
|
| Year 5 |
231,555
|
|
213,593
|
|
|
|
| After Year 5 |
525,887
|
|
452,994
|
|
|
|
| Loan type |
5,128,758
|
|
5,291,991
|
|
|
|
| Loans In Forbearance | Consumer Portfolio Segment | Student Loan |
|
|
|
|
|
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] |
|
|
|
|
|
|
| Total Private Education Loans in forbearance, Year 1 |
2,295
|
|
19,265
|
|
|
|
| Total Private Education Loans in forbearance, Year 2 |
33,722
|
|
93,079
|
|
|
|
| Total Private Education Loans in forbearance, Year 3 |
60,256
|
|
58,438
|
|
|
|
| Total Private Education Loans in forbearance, Year 4 |
35,789
|
|
35,450
|
|
|
|
| Total Private Education Loans in forbearance, Year 5 |
25,101
|
|
31,818
|
|
|
|
| Total Private Education Loans in forbearance, After Year 5 |
102,029
|
|
85,989
|
|
|
|
| Total Private Education Loans in forbearance |
$ 259,192
|
|
$ 324,039
|
|
|
|