Investment Securities, AFS and HTM Securities Amortized Costs and Fair Values (Details) - USD ($)
$ in Thousands |
Sep. 30, 2026 |
Dec. 31, 2025 |
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale, Amortized Cost |
$ 6,443,528
|
$ 5,367,813
|
| Debt Securities, Available-for-Sale |
6,198,828
|
5,397,563
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax |
(245,157)
|
(11,551)
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |
457
|
41,301
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
3,462,220
|
3,602,576
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain |
44
|
3,488
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss |
(657,382)
|
(415,070)
|
| Debt Securities, Held-to-Maturity, Fair Value |
2,804,882
|
3,190,994
|
| Equity securities |
15,000
|
15,000
|
| US Treasury Securities |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
997
|
996
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain |
0
|
19
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss |
(4)
|
0
|
| Debt Securities, Held-to-Maturity, Fair Value |
993
|
1,015
|
| US Treasury Securities | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
997
|
996
|
| Debt Securities, Held-to-Maturity, Fair Value |
993
|
1,015
|
| US Treasury Securities | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Held-to-Maturity, Fair Value |
0
|
0
|
| US States and Political Subdivisions Debt Securities [Member] |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale, Amortized Cost |
6,849
|
3,063
|
| Debt Securities, Available-for-Sale |
6,392
|
3,044
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax |
(457)
|
(20)
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |
0
|
1
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
1,576,827
|
1,628,088
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain |
44
|
3,070
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss |
(272,110)
|
(123,856)
|
| Debt Securities, Held-to-Maturity, Fair Value |
1,304,761
|
1,507,302
|
| US States and Political Subdivisions Debt Securities [Member] | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
6,392
|
3,044
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
1,576,827
|
1,628,088
|
| Debt Securities, Held-to-Maturity, Fair Value |
1,304,761
|
1,507,302
|
| US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
6,392
|
3,044
|
| Debt Securities, Held-to-Maturity, Fair Value |
1,304,761
|
1,507,302
|
| Mortgage-backed Securities, Issued by Private Enterprises [Member] |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale, Amortized Cost |
0
|
|
| Debt Securities, Available-for-Sale |
0
|
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
284,928
|
302,817
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain |
0
|
0
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss |
(60,012)
|
(43,990)
|
| Debt Securities, Held-to-Maturity, Fair Value |
224,916
|
258,827
|
| Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale, Amortized Cost |
86,587
|
95,977
|
| Debt Securities, Available-for-Sale |
86,048
|
95,046
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax |
(573)
|
(950)
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |
34
|
19
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
0
|
|
| Debt Securities, Held-to-Maturity, Fair Value |
0
|
|
| Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
86,048
|
95,046
|
| Federal Family Education Loan Program (FFELP) Guaranteed Loans [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
86,048
|
95,046
|
| US Government-sponsored Enterprises Debt Securities [Member] |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale, Amortized Cost |
174,150
|
283
|
| Debt Securities, Available-for-Sale |
164,502
|
269
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax |
(9,648)
|
(14)
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |
0
|
0
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
0
|
|
| Debt Securities, Held-to-Maturity, Fair Value |
0
|
|
| US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
164,502
|
269
|
| US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
164,502
|
269
|
| Other Debt securities |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale, Amortized Cost |
6,750
|
3,000
|
| Debt Securities, Available-for-Sale |
5,054
|
2,998
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax |
(1,696)
|
(2)
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |
0
|
0
|
| US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member] |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale, Amortized Cost |
146,337
|
134,142
|
| Debt Securities, Available-for-Sale |
134,464
|
129,863
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax |
(11,979)
|
(5,493)
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |
106
|
1,214
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
771,047
|
823,630
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain |
0
|
165
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss |
(172,347)
|
(127,333)
|
| Debt Securities, Held-to-Maturity, Fair Value |
598,700
|
696,462
|
| US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
134,464
|
129,863
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
771,047
|
823,630
|
| Debt Securities, Held-to-Maturity, Fair Value |
598,700
|
696,462
|
| US Government Sponsored-Enterprise Insured Loans | Residential Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
134,464
|
129,863
|
| Debt Securities, Held-to-Maturity, Fair Value |
598,700
|
696,462
|
| US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member] |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale, Amortized Cost |
369,363
|
17,959
|
| Debt Securities, Available-for-Sale |
347,399
|
16,958
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax |
(21,964)
|
(1,001)
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |
0
|
0
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
752,924
|
763,370
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain |
0
|
0
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss |
(143,020)
|
(113,004)
|
| Debt Securities, Held-to-Maturity, Fair Value |
609,904
|
650,366
|
| US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
347,399
|
16,958
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
752,924
|
763,370
|
| Debt Securities, Held-to-Maturity, Fair Value |
609,904
|
650,366
|
| US Government Sponsored-Enterprise Insured Loans | Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
347,399
|
16,958
|
| Debt Securities, Held-to-Maturity, Fair Value |
609,904
|
650,366
|
| Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member] |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale, Amortized Cost |
5,542,393
|
5,000,015
|
| Debt Securities, Available-for-Sale |
5,352,106
|
5,039,829
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax |
(190,604)
|
(253)
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |
317
|
40,067
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
36,181
|
39,123
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain |
0
|
82
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss |
(4,547)
|
(2,321)
|
| Debt Securities, Held-to-Maturity, Fair Value |
31,634
|
36,884
|
| Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
5,352,106
|
5,039,829
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
36,181
|
39,123
|
| Debt Securities, Held-to-Maturity, Fair Value |
31,634
|
36,884
|
| Government National Mortgage Association (GNMA) [Member] | Residential Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
5,352,106
|
5,039,829
|
| Debt Securities, Held-to-Maturity, Fair Value |
31,634
|
36,884
|
| Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member] |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale, Amortized Cost |
111,099
|
113,374
|
| Debt Securities, Available-for-Sale |
102,863
|
109,556
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax |
(8,236)
|
(3,818)
|
| Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |
0
|
0
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
39,316
|
44,552
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Gain |
0
|
152
|
| Debt Securities, Held-to-Maturity, Accumulated Unrecognized Loss |
(5,342)
|
(4,566)
|
| Debt Securities, Held-to-Maturity, Fair Value |
33,974
|
40,138
|
| Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member] | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
102,863
|
109,556
|
| Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss |
39,316
|
44,552
|
| Debt Securities, Held-to-Maturity, Fair Value |
33,974
|
40,138
|
| Government National Mortgage Association (GNMA) [Member] | Commercial Mortgage-Backed Securities [Member] | Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring |
|
|
| Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |
|
|
| Debt Securities, Available-for-Sale |
102,863
|
109,556
|
| Debt Securities, Held-to-Maturity, Fair Value |
$ 33,974
|
$ 40,138
|