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Investment Securities - Unrealized Gross Losses and Fair Values of Securities in a Continuous Loss Position (Details) | 12 Months Ended
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Dec. 31, 2022 USD ($) security shares | Dec. 31, 2021 USD ($) security shares
Securities in the available-for-sale portfolio in a continuous loss position |  |
Number of individual securities in a continuous loss position | security | 275 | 318
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | $ (213,696,000) | $ (125,923,000)
12 Months or More Unrealized Losses | (184,820,000) | (31,373,000)
Total Unrealized Losses | (398,516,000) | (157,296,000)
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 2,023,259,000 | 6,044,029,000
12 Months or More Fair Value | 1,056,595,000 | 497,202,000
Total Fair Value | $ 3,079,854,000 | $ 6,541,231,000
Investment securities comprised of collateralized loan obligations rated AA or better and obligations issued by local state and political subdivisions rated AA or better | 4.00% | 4.00%
Allowance for credit losses for its available-for-sale debt securities | $ 0 | $ 0
Allowance for credit losses for its held-to-maturity debt securities | $ 0 | $ 0
Class B restricted shares | Visa |  |
Time in Continuous Loss, Fair Value |  |
Shares held | shares | 120,000 | 120,000
Cost basis | $ 0 | $ 0
U.S. Treasury and government agency debt securities |  |
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | (2,962,000) | (3,355,000)
12 Months or More Unrealized Losses | (9,365,000) | (869,000)
Total Unrealized Losses | (12,327,000) | (4,224,000)
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 83,870,000 | 134,468,000
12 Months or More Fair Value | 67,112,000 | 16,642,000
Total Fair Value | 150,982,000 | 151,110,000
Government-sponsored enterprises debt securities |  |
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | (699,000) |
Total Unrealized Losses | (699,000) |
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 44,301,000 |
Total Fair Value | 44,301,000 |
Residential - Government-sponsored enterprises |  |
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | (73,954,000) | (10,876,000)
12 Months or More Unrealized Losses | (83,309,000) | (1,543,000)
Total Unrealized Losses | (157,263,000) | (12,419,000)
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 645,338,000 | 1,230,104,000
12 Months or More Fair Value | 515,117,000 | 32,415,000
Total Fair Value | 1,160,455,000 | 1,262,519,000
Residential - Government agency |  |
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | (7,069,000) | (291,000)
Total Unrealized Losses | (7,069,000) | (291,000)
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 59,723,000 | 51,231,000
Total Fair Value | 59,723,000 | 51,231,000
Commercial - Government agency |  |
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | (15,852,000) | (5,239,000)
12 Months or More Unrealized Losses | (28,995,000) | (1,282,000)
Total Unrealized Losses | (44,847,000) | (6,521,000)
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 108,842,000 | 186,024,000
12 Months or More Fair Value | 129,011,000 | 26,063,000
Total Fair Value | 237,853,000 | 212,087,000
Commercial - Government-sponsored enterprises |  |
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | (7,348,000) | (22,179,000)
12 Months or More Unrealized Losses | (3,691,000) | (26,535,000)
Total Unrealized Losses | (11,039,000) | (48,714,000)
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 94,657,000 | 744,819,000
12 Months or More Fair Value | 24,916,000 | 397,123,000
Total Fair Value | 119,573,000 | 1,141,942,000
Commercial - Non -agency |  |
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | (493,000) |
Total Unrealized Losses | (493,000) |
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 21,471,000 |
Total Fair Value | 21,471,000 |
Government agency |  |
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | (74,797,000) | (31,432,000)
12 Months or More Unrealized Losses | (10,405,000) |
Total Unrealized Losses | (85,202,000) | (31,432,000)
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 596,907,000 | 1,441,848,000
12 Months or More Fair Value | 56,415,000 |
Total Fair Value | 653,322,000 | 1,441,848,000
Government-sponsored enterprises |  |
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | (21,916,000) | (52,551,000)
12 Months or More Unrealized Losses | (49,055,000) | (1,144,000)
Total Unrealized Losses | (70,971,000) | (53,695,000)
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 198,108,000 | 2,255,535,000
12 Months or More Fair Value | 264,024,000 | 24,959,000
Total Fair Value | 462,132,000 | $ 2,280,494,000
Collateralized Loan Obligations |  |
Time in Continuous Loss, Unrealized Losses |  |
Less Than 12 Months Unrealized Losses | (8,606,000) |
Total Unrealized Losses | (8,606,000) |
Time in Continuous Loss, Fair Value |  |
Less Than 12 Months, Fair Value | 170,042,000 |
Total Fair Value | $ 170,042,000 |

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