Investment Securities - Schedule of Gross Unrealized Losses and Fair Value of Available-for-Sale Securities (Details)
$ in Thousands |
Jun. 30, 2026
USD ($)
holding
|
Dec. 31, 2025
USD ($)
holding
|
| Schedule of Investments [Line Items] |
|
|
| Less Than 12 Months, Fair Value |
$ 1,890,466
|
$ 729,099
|
| Less Than 12 Months, Gross Unrealized Losses |
(19,284)
|
(11,381)
|
| 12 Months or More, Fair Value |
4,484,984
|
4,336,787
|
| 12 Months or More, Gross Unrealized Losses |
$ (611,407)
|
$ (537,639)
|
| Total, Number of Holdings | holding |
672
|
623
|
| Total, Fair Value |
$ 6,375,450
|
$ 5,065,886
|
| Total, Gross Unrealized Losses |
(630,691)
|
(549,020)
|
| Government agency debentures |
|
|
| Schedule of Investments [Line Items] |
|
|
| Less Than 12 Months, Fair Value |
14,486
|
0
|
| Less Than 12 Months, Gross Unrealized Losses |
(396)
|
0
|
| 12 Months or More, Fair Value |
180,685
|
197,650
|
| 12 Months or More, Gross Unrealized Losses |
$ (27,321)
|
$ (25,198)
|
| Total, Number of Holdings | holding |
15
|
15
|
| Total, Fair Value |
$ 195,171
|
$ 197,650
|
| Total, Gross Unrealized Losses |
(27,717)
|
(25,198)
|
| Agency CMO |
|
|
| Schedule of Investments [Line Items] |
|
|
| Less Than 12 Months, Fair Value |
0
|
0
|
| Less Than 12 Months, Gross Unrealized Losses |
0
|
0
|
| 12 Months or More, Fair Value |
22,492
|
24,856
|
| 12 Months or More, Gross Unrealized Losses |
$ (2,157)
|
$ (1,960)
|
| Total, Number of Holdings | holding |
25
|
25
|
| Total, Fair Value |
$ 22,492
|
$ 24,856
|
| Total, Gross Unrealized Losses |
(2,157)
|
(1,960)
|
| Agency MBS |
|
|
| Schedule of Investments [Line Items] |
|
|
| Less Than 12 Months, Fair Value |
1,303,779
|
15,368
|
| Less Than 12 Months, Gross Unrealized Losses |
(12,332)
|
(22)
|
| 12 Months or More, Fair Value |
1,124,856
|
1,197,592
|
| 12 Months or More, Gross Unrealized Losses |
$ (154,497)
|
$ (148,508)
|
| Total, Number of Holdings | holding |
345
|
301
|
| Total, Fair Value |
$ 2,428,635
|
$ 1,212,960
|
| Total, Gross Unrealized Losses |
(166,829)
|
(148,530)
|
| Agency CMBS |
|
|
| Schedule of Investments [Line Items] |
|
|
| Less Than 12 Months, Fair Value |
459,868
|
542,126
|
| Less Than 12 Months, Gross Unrealized Losses |
(6,198)
|
(10,939)
|
| 12 Months or More, Fair Value |
2,682,961
|
2,395,394
|
| 12 Months or More, Gross Unrealized Losses |
$ (392,191)
|
$ (327,500)
|
| Total, Number of Holdings | holding |
202
|
184
|
| Total, Fair Value |
$ 3,142,829
|
$ 2,937,520
|
| Total, Gross Unrealized Losses |
(398,389)
|
(338,439)
|
| Municipal bonds and notes |
|
|
| Schedule of Investments [Line Items] |
|
|
| Less Than 12 Months, Fair Value |
7,664
|
0
|
| Less Than 12 Months, Gross Unrealized Losses |
(126)
|
0
|
| 12 Months or More, Fair Value |
100,780
|
108,944
|
| 12 Months or More, Gross Unrealized Losses |
$ (6,614)
|
$ (7,131)
|
| Total, Number of Holdings | holding |
34
|
36
|
| Total, Fair Value |
$ 108,444
|
$ 108,944
|
| Total, Gross Unrealized Losses |
(6,740)
|
(7,131)
|
| CMBS |
|
|
| Schedule of Investments [Line Items] |
|
|
| Less Than 12 Months, Fair Value |
89,865
|
151,663
|
| Less Than 12 Months, Gross Unrealized Losses |
(36)
|
(362)
|
| 12 Months or More, Fair Value |
60,202
|
72,197
|
| 12 Months or More, Gross Unrealized Losses |
$ (1,011)
|
$ (533)
|
| Total, Number of Holdings | holding |
9
|
16
|
| Total, Fair Value |
$ 150,067
|
$ 223,860
|
| Total, Gross Unrealized Losses |
(1,047)
|
(895)
|
| Corporate debt |
|
|
| Schedule of Investments [Line Items] |
|
|
| Less Than 12 Months, Fair Value |
9,831
|
14,948
|
| Less Than 12 Months, Gross Unrealized Losses |
(169)
|
(52)
|
| 12 Months or More, Fair Value |
272,613
|
297,613
|
| 12 Months or More, Gross Unrealized Losses |
$ (23,499)
|
$ (23,383)
|
| Total, Number of Holdings | holding |
37
|
41
|
| Total, Fair Value |
$ 282,444
|
$ 312,561
|
| Total, Gross Unrealized Losses |
(23,668)
|
(23,435)
|
| Private label MBS |
|
|
| Schedule of Investments [Line Items] |
|
|
| Less Than 12 Months, Fair Value |
0
|
0
|
| Less Than 12 Months, Gross Unrealized Losses |
0
|
0
|
| 12 Months or More, Fair Value |
35,939
|
38,052
|
| 12 Months or More, Gross Unrealized Losses |
$ (3,680)
|
$ (3,035)
|
| Total, Number of Holdings | holding |
3
|
3
|
| Total, Fair Value |
$ 35,939
|
$ 38,052
|
| Total, Gross Unrealized Losses |
(3,680)
|
(3,035)
|
| Other |
|
|
| Schedule of Investments [Line Items] |
|
|
| Less Than 12 Months, Fair Value |
4,973
|
4,994
|
| Less Than 12 Months, Gross Unrealized Losses |
(27)
|
(6)
|
| 12 Months or More, Fair Value |
4,456
|
4,489
|
| 12 Months or More, Gross Unrealized Losses |
$ (437)
|
$ (391)
|
| Total, Number of Holdings | holding |
2
|
2
|
| Total, Fair Value |
$ 9,429
|
$ 9,483
|
| Total, Gross Unrealized Losses |
$ (464)
|
$ (397)
|