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Fair Value - Assets and Liabilities Recorded at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets |  |
Total available-for-sale securities, Fair value, | $ 3,151,133 | $ 8,428,032
Collateralized Loan Obligations |  |
Assets |  |
Total available-for-sale securities, Fair value, | 241,321 | 105,247
Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, | 3,151,133 | 8,428,032
Other assets | 16,321 | 58,307
Liabilities |  |
Other liabilities | (50,119) | (6,768)
Total |  |
Net Assets (Liabilities) | 3,117,335 | 8,479,571
Fair Value, Measurements, Recurring | Collateralized Loan Obligations |  |
Assets |  |
Total available-for-sale securities, Fair value, | 241,321 |
Fair Value, Measurements, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets |  |
Other assets | 5,376 | 7,382
Total |  |
Net Assets (Liabilities) | 5,376 | 7,382
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 3,151,133 | 8,428,032
Other assets | 10,945 | 50,925
Liabilities |  |
Other liabilities | (49,268) | (1,238)
Total |  |
Net Assets (Liabilities) | 3,112,810 | 8,477,719
Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) | Collateralized Loan Obligations |  |
Assets |  |
Total available-for-sale securities, Fair value, | 241,321 |
Fair Value, Measurements, Recurring | Significant Unobservable Inputs (Level 3) |  |
Liabilities |  |
Other liabilities | (851) | (5,530)
Total |  |
Net Assets (Liabilities) | (851) | (5,530)
U.S. Treasury and government agency debt securities |  |
Assets |  |
Total available-for-sale securities, Fair value, | 150,982 | 192,563
U.S. Treasury and government agency debt securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, | 150,982 | 192,563
U.S. Treasury and government agency debt securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 150,982 | 192,563
Government-sponsored enterprises debt securities |  |
Assets |  |
Total available-for-sale securities, Fair value, | 44,301 |
Government-sponsored enterprises debt securities | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, | 44,301 |
Government-sponsored enterprises debt securities | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 44,301 |
Residential - Government agency |  |
Assets |  |
Total available-for-sale securities, Fair value, | 59,723 | 137,264
Residential - Government agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, | 59,723 | 137,264
Residential - Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 59,723 | 137,264
Residential - Government-sponsored enterprises |  |
Assets |  |
Total available-for-sale securities, Fair value, | 1,160,455 | 1,491,100
Residential - Government-sponsored enterprises | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, | 1,160,455 | 1,491,100
Residential - Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 1,160,455 | 1,491,100
Commercial - Government agency |  |
Assets |  |
Total available-for-sale securities, Fair value, | 237,853 | 387,663
Commercial - Government agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, | 237,853 | 387,663
Commercial - Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 237,853 | 387,663
Commercial - Government-sponsored enterprises |  |
Assets |  |
Total available-for-sale securities, Fair value, | 119,573 | 1,369,443
Commercial - Government-sponsored enterprises | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, | 119,573 | 1,369,443
Commercial - Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 119,573 | 1,369,443
Commercial - Non-government mortgage | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, | 21,471 |
Commercial - Non-government mortgage | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 21,471 |
Government agency |  |
Assets |  |
Total available-for-sale securities, Fair value, | 653,322 | 2,079,523
Government agency | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, | 653,322 | 2,079,523
Government agency | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | 653,322 | 2,079,523
Government-sponsored enterprises |  |
Assets |  |
Total available-for-sale securities, Fair value, | 462,132 | 2,621,044
Government-sponsored enterprises | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, | 462,132 | 2,621,044
Government-sponsored enterprises | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, | $ 462,132 | 2,621,044
Collateralized Loan Obligations | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, |  | 105,247
Collateralized Loan Obligations | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, |  | 105,247
Debt securities issued by states and political subdivisions |  |
Assets |  |
Total available-for-sale securities, Fair value, |  | 44,185
Debt securities issued by states and political subdivisions | Fair Value, Measurements, Recurring |  |
Assets |  |
Total available-for-sale securities, Fair value, |  | 44,185
Debt securities issued by states and political subdivisions | Fair Value, Measurements, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Total available-for-sale securities, Fair value, |  | $ 44,185

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