Segment Information and Concentration - Segment Information and Concentration. - Top Ten Advance Holders and Associated Interest Income (Details) - USD ($)
$ in Thousands |
3 Months Ended |
6 Months Ended |
12 Months Ended |
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
$ 127,692,199
|
|
$ 127,692,199
|
|
$ 92,466,404
|
| Interest Income |
1,175,843
|
$ 1,260,147
|
2,211,671
|
$ 2,467,151
|
|
| Par Advances | Credit Concentration Risk | Top Ten Advance Holders |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
94,934,712
|
71,677,649
|
$ 94,934,712
|
$ 71,677,649
|
$ 65,442,096
|
| Concentration risk percentage |
|
|
74.35%
|
68.28%
|
70.75%
|
| Par Advances | Credit Concentration Risk | Citibank, N.A. |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
29,000,000
|
15,500,000
|
$ 29,000,000
|
$ 15,500,000
|
$ 9,000,000
|
| Concentration risk percentage |
|
|
22.71%
|
14.77%
|
9.73%
|
| Par Advances | Credit Concentration Risk | MetLife, Inc.: |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
14,215,000
|
14,215,000
|
$ 14,215,000
|
$ 14,215,000
|
$ 14,215,000
|
| Concentration risk percentage |
|
|
11.13%
|
13.54%
|
15.37%
|
| Par Advances | Credit Concentration Risk | Metropolitan Life Insurance Company |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
12,835,000
|
12,835,000
|
$ 12,835,000
|
$ 12,835,000
|
$ 12,835,000
|
| Concentration risk percentage |
|
|
10.05%
|
12.23%
|
13.88%
|
| Par Advances | Credit Concentration Risk | Metropolitan Tower Life Insurance Company |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
1,380,000
|
1,380,000
|
$ 1,380,000
|
$ 1,380,000
|
$ 1,380,000
|
| Concentration risk percentage |
|
|
1.08%
|
1.31%
|
1.49%
|
| Par Advances | Credit Concentration Risk | Teachers Ins. and Annuity Assoc of America |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
12,866,800
|
6,920,900
|
$ 12,866,800
|
$ 6,920,900
|
$ 7,228,900
|
| Concentration risk percentage |
|
|
10.08%
|
6.59%
|
7.82%
|
| Par Advances | Credit Concentration Risk | Flagstar Bank, N.A. |
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|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
8,500,000
|
10,750,000
|
$ 8,500,000
|
$ 10,750,000
|
$ 9,750,000
|
| Concentration risk percentage |
|
|
6.66%
|
10.24%
|
10.54%
|
| Par Advances | Credit Concentration Risk | Equitable Financial Life Insurance Co. |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
6,865,063
|
6,865,063
|
$ 6,865,063
|
$ 6,865,063
|
$ 6,865,063
|
| Concentration risk percentage |
|
|
5.38%
|
6.54%
|
7.42%
|
| Par Advances | Credit Concentration Risk | Goldman Sachs Bank USA |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
5,500,000
|
5,000,000
|
$ 5,500,000
|
$ 5,000,000
|
$ 5,500,000
|
| Concentration risk percentage |
|
|
4.31%
|
4.76%
|
5.95%
|
| Par Advances | Credit Concentration Risk | New York Life Insurance Company |
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|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
4,788,000
|
3,788,000
|
$ 4,788,000
|
$ 3,788,000
|
$ 4,588,000
|
| Concentration risk percentage |
|
|
3.75%
|
3.61%
|
4.96%
|
| Par Advances | Credit Concentration Risk | Morgan Stanley Private Bank, NA |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
4,600,000
|
3,000,000
|
$ 4,600,000
|
$ 3,000,000
|
|
| Concentration risk percentage |
|
|
3.60%
|
2.86%
|
|
| Par Advances | Credit Concentration Risk | Manufacturers and Traders Trust Company |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
4,550,132
|
|
$ 4,550,132
|
|
|
| Concentration risk percentage |
|
|
3.56%
|
|
|
| Par Advances | Credit Concentration Risk | Guardian Life Insurance Co. of America |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
$ 4,049,717
|
3,019,436
|
$ 4,049,717
|
$ 3,019,436
|
$ 3,212,279
|
| Concentration risk percentage |
|
|
3.17%
|
2.88%
|
3.47%
|
| Par Advances | Credit Concentration Risk | Prudential Insurance Company of America |
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|
|
|
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| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
|
$ 2,619,250
|
|
$ 2,619,250
|
$ 2,619,250
|
| Concentration risk percentage |
|
|
|
2.50%
|
2.83%
|
| Par Advances | Credit Concentration Risk | Valley National Bank |
|
|
|
|
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| Concentration Risk [Line Items] |
|
|
|
|
|
| Par Advances |
|
|
|
|
$ 2,463,604
|
| Concentration risk percentage |
|
|
|
|
2.66%
|
| Interest Income | Credit Concentration Risk | Top Ten Advance Holders |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
100.00%
|
100.00%
|
100.00%
|
100.00%
|
100.00%
|
| Interest Income |
$ 836,013
|
$ 804,036
|
$ 1,529,764
|
$ 1,546,453
|
$ 3,006,293
|
| Interest Income | Credit Concentration Risk | Citibank, N.A. |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
19.83%
|
22.27%
|
17.12%
|
22.46%
|
20.86%
|
| Interest Income |
$ 165,771
|
$ 179,027
|
$ 261,932
|
$ 347,304
|
$ 627,210
|
| Interest Income | Credit Concentration Risk | MetLife, Inc.: |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
14.45%
|
16.33%
|
15.67%
|
16.90%
|
17.50%
|
| Interest Income |
$ 120,745
|
$ 131,252
|
$ 239,638
|
$ 261,282
|
$ 526,254
|
| Interest Income | Credit Concentration Risk | Metropolitan Life Insurance Company |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
12.95%
|
14.67%
|
14.03%
|
15.21%
|
15.72%
|
| Interest Income |
$ 108,232
|
$ 117,923
|
$ 214,610
|
$ 235,138
|
$ 472,618
|
| Interest Income | Credit Concentration Risk | Metropolitan Tower Life Insurance Company |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
1.50%
|
1.66%
|
1.64%
|
1.69%
|
1.78%
|
| Interest Income |
$ 12,513
|
$ 13,329
|
$ 25,028
|
$ 26,144
|
$ 53,636
|
| Interest Income | Credit Concentration Risk | Teachers Ins. and Annuity Assoc of America |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
15.35%
|
10.55%
|
15.74%
|
11.02%
|
10.98%
|
| Interest Income |
$ 128,343
|
$ 84,840
|
$ 240,772
|
$ 170,442
|
$ 330,216
|
| Interest Income | Credit Concentration Risk | Flagstar Bank, N.A. |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
9.42%
|
17.22%
|
11.02%
|
18.04%
|
17.47%
|
| Interest Income |
$ 78,742
|
$ 138,490
|
$ 168,626
|
$ 278,980
|
$ 525,013
|
| Interest Income | Credit Concentration Risk | Equitable Financial Life Insurance Co. |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
7.76%
|
8.98%
|
8.37%
|
9.31%
|
9.42%
|
| Interest Income |
$ 64,873
|
$ 72,214
|
$ 127,972
|
$ 144,001
|
$ 283,217
|
| Interest Income | Credit Concentration Risk | Goldman Sachs Bank USA |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
6.46%
|
7.19%
|
7.08%
|
7.47%
|
7.49%
|
| Interest Income |
$ 54,047
|
$ 57,826
|
$ 108,233
|
$ 115,469
|
$ 225,157
|
| Interest Income | Credit Concentration Risk | New York Life Insurance Company |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
5.94%
|
5.44%
|
6.31%
|
5.32%
|
5.53%
|
| Interest Income |
$ 49,683
|
$ 43,734
|
$ 96,553
|
$ 82,280
|
$ 166,103
|
| Interest Income | Credit Concentration Risk | Morgan Stanley Private Bank, NA |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
7.48%
|
5.59%
|
5.82%
|
3.03%
|
|
| Interest Income |
$ 62,508
|
$ 44,942
|
$ 89,014
|
$ 46,838
|
|
| Interest Income | Credit Concentration Risk | Manufacturers and Traders Trust Company |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
8.74%
|
|
8.21%
|
|
|
| Interest Income |
$ 73,059
|
|
$ 125,607
|
|
|
| Interest Income | Credit Concentration Risk | Guardian Life Insurance Co. of America |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
4.57%
|
3.85%
|
4.67%
|
3.78%
|
4.26%
|
| Interest Income |
$ 38,242
|
$ 30,920
|
$ 71,418
|
$ 58,502
|
$ 128,077
|
| Interest Income | Credit Concentration Risk | Prudential Insurance Company of America |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
|
2.59%
|
|
2.67%
|
2.77%
|
| Interest Income |
|
$ 20,792
|
|
$ 41,355
|
$ 83,396
|
| Interest Income | Credit Concentration Risk | Valley National Bank |
|
|
|
|
|
| Concentration Risk [Line Items] |
|
|
|
|
|
| Concentration risk percentage |
|
|
|
|
3.71%
|
| Interest Income |
|
|
|
|
$ 111,650
|