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Borrowings and Subordinated Debentures - Subordinated Debentures (Details) $ in Thousands, € in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2024 USD ($) Rate | Mar. 31, 2024 EUR (€) | Dec. 31, 2023 USD ($)
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Subordinated Debentures, Gross |  | $ 1,012,909 |  |  |  | $ 1,013,419
Subordinated debt |  | $ 937,717 |  |  |  | $ 936,599
Rate |  | 5.87% |  | 5.87% |  | 4.92%
Debt Issuance Costs, Gross |  | $ (4,200) |  |  |  |
Trust Preferred Securities Two Thousand Six Series Three |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Denomination value | € |  |  |  | € 25.8 |  |
Subordinated notes due May 2031 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 2.52% |  |  |  |
Euribor Rate | Trust Preferred Securities Two Thousand Six Series Three |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 2.05% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Subordinated Debt Trust V Due September 2033 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 3.10% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Subordinated Debt Trust VI Due September 2033 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 3.05% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Subordinated Debt Trust CII Due September 2033 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 2.95% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Subordinated Debt Trust VII Due April 2034 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 2.75% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Subordinated Debt Trust CIII Due September 2035 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 1.69% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Subordinated Debt Trust FCCI Due March 2037 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 1.60% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Subordinated Debt Trust FCBI Due December 2035 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 1.55% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Trust Preferred Securities Two Thousand Five Series One |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 1.95% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Trust Preferred Securities Two Thousand Five Series Two |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 1.95% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Two Thousand Six Two Term Debt Securitization |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 1.95% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Trust Preferred Securities Two Thousand Six Series Five |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 1.95% |  |  |  |
Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate | Two Thousand Seven One Term Debt Securitization |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 1.95% |  |  |  |
Prime | Two Thousand Six One Term Debt Securitization |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 1.95% |  |  |  |
Prime | Trust Preferred Securities Two Thousand Six Series Four |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Rate Index (Quarterly Reset) |  | 1.95% |  |  |  |
Subordinated Debentures |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Unamortized discount | [1] | $ (75,192) |  |  |  | $ (76,820)
Rate |  | 5.90% | [2] | 5.90% | [2] | 5.93%
Subordinated Debentures | Subordinated Debt Trust V Due September 2033 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 10,310 |  |  |  | $ 10,310
Rate |  | 8.69% | [2] | 8.69% | [2] | 8.74%
Subordinated Debentures | Subordinated Debt Trust VI Due September 2033 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 10,310 |  |  |  | $ 10,310
Rate |  | 8.64% | [2] | 8.64% | [2] | 8.70%
Subordinated Debentures | Subordinated Debt Trust CII Due September 2033 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 5,155 |  |  |  | $ 5,155
Rate |  | 8.54% | [2] | 8.54% | [2] | 8.59%
Subordinated Debentures | Subordinated Debt Trust VII Due April 2034 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 61,856 |  |  |  | $ 61,856
Rate |  | 8.33% | [2] | 8.33% | [2] | 8.40%
Subordinated Debentures | Subordinated Debt Trust CIII Due September 2035 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 20,619 |  |  |  | $ 20,619
Rate |  | 7.28% | [2] | 7.28% | [2] | 7.34%
Subordinated Debentures | Subordinated Debt Trust FCCI Due March 2037 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 16,495 |  |  |  | $ 16,495
Rate |  | 7.19% | [2] | 7.19% | [2] | 7.25%
Subordinated Debentures | Subordinated Debt Trust FCBI Due December 2035 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 10,310 |  |  |  | $ 10,310
Rate |  | 7.14% | [2] | 7.14% | [2] | 7.20%
Subordinated Debentures | Trust Preferred Securities Two Thousand Five Series One |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 82,475 |  |  |  | $ 82,475
Rate |  | 7.54% | [2] | 7.54% | [2] | 7.60%
Subordinated Debentures | Trust Preferred Securities Two Thousand Five Series Two |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 128,866 |  |  |  | $ 128,866
Rate |  | 7.53% | [2] | 7.53% | [2] | 7.60%
Subordinated Debentures | Two Thousand Six One Term Debt Securitization |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 51,545 |  |  |  | $ 51,545
Rate |  | 10.45% | [2] | 10.45% | [2] | 10.45%
Subordinated Debentures | Two Thousand Six Two Term Debt Securitization |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 51,550 |  |  |  | $ 51,550
Rate |  | 7.53% | [2] | 7.53% | [2] | 7.60%
Subordinated Debentures | Trust Preferred Securities Two Thousand Six Series Three |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance | [3] | $ 27,811 |  |  |  | $ 28,453
Rate |  | 5.94% | [2] | 5.94% | [2] | 6.00%
Subordinated Debentures | Trust Preferred Securities Two Thousand Six Series Four |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 16,470 |  |  |  | $ 16,470
Rate |  | 10.55% | [2] | 10.55% | [2] | 10.45%
Subordinated Debentures | Trust Preferred Securities Two Thousand Six Series Five |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 6,650 |  |  |  | $ 6,650
Rate |  | 7.53% | [2] | 7.53% | [2] | 7.60%
Subordinated Debentures | Two Thousand Seven One Term Debt Securitization |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 39,177 |  |  |  | $ 39,177
Rate |  | 7.53% | [2] | 7.53% | [2] | 7.60%
Subordinated Debentures | Subordinated notes due May 2031 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 380,783 | [4] |  |  | $ 380,651
Rate |  | 3.25% | [2] | 3.25% | [2] | 3.25%
Subordinated Debentures | Subordinated Notes Due October 30, 2030 |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 75,000 |  |  |  | $ 75,000
Rate |  | 4.375% |  | 4.375% |  | 4.375%
Rate Index (Quarterly Reset) | Rate |  | 4.195% |  |  |  |
Subordinated Debentures | PMB Statutory Trust III |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 7,217 |  |  |  | $ 7,217
Rate |  | 8.97% |  | 8.97% |  | 9.02%
Subordinated Debentures | PMB CapitalTrust III |  |  |  |  |  |
Subordinated Borrowing [Line Items] |  |  |  |  |  |
Balance |  | $ 10,310 |  |  |  | $ 10,310
Rate |  | 7.60% |  | 7.60% |  | 7.66%
[1] | Amount represents the fair value adjustment on trust preferred securities assumed in acquisitions. (6) Interest rate is fixed until October 30, 2025, when it changes to a floating rate equal to a benchmark rate, which is expected to be 3-month Term SOFR, plus a spread of 419.5 basis points.
[2] | Rates do not include the effects of discounts and issuance costs.
[3] | Denomination is in Euros with a value of €25.8 million.
[4] | Net of unamortized issuance costs of $4.2 million.

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