Fair Value Measurements - Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Thousands |
Mar. 31, 2023 |
Dec. 31, 2022 |
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Equity Securities, FV-NI |
$ 1
|
$ 1
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
4,848,607
|
4,843,487
|
| Other Borrowings, Fair Value Disclosure |
128,375
|
132,030
|
| Securities available-for-sale, at fair value |
4,848,607
|
4,843,487
|
| Credit-Link Notes |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Other Borrowings, Fair Value Disclosure |
128,375
|
132,030
|
| Agency residential CMOs |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
455,682
|
457,063
|
| Collateralized loan obligations |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
102,994
|
102,261
|
| Municipal securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
345,639
|
339,326
|
| Agency commercial MBS |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
491,681
|
487,606
|
| SBA securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
15,906
|
17,250
|
| Corporate Debt Securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
289,794
|
311,905
|
| U.S. Treasury securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
685,436
|
670,070
|
| Private label commercial MBS |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
25,535
|
26,827
|
| Private Label Collateralized Mortgage Obligations |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
164,403
|
166,724
|
| Asset-backed Securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
22,457
|
22,413
|
| Level 3 |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Equity warrants |
|
4,048
|
| Fair Value, Measurements, Recurring |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Equity warrants |
3,978
|
4,048
|
| Interest rate and economic contracts |
7,025
|
7,814
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
4,848,607
|
|
| Fair Value, Measurements, Recurring | Government agency and government-sponsored enterprise pass through securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
2,249,080
|
2,242,042
|
| Fair Value, Measurements, Recurring | Agency residential CMOs |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
455,682
|
457,063
|
| Fair Value, Measurements, Recurring | Collateralized loan obligations |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
102,994
|
102,261
|
| Fair Value, Measurements, Recurring | Municipal securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
345,639
|
339,326
|
| Fair Value, Measurements, Recurring | Agency commercial MBS |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
491,681
|
487,606
|
| Fair Value, Measurements, Recurring | SBA securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
15,906
|
17,250
|
| Fair Value, Measurements, Recurring | Corporate Debt Securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
289,794
|
311,905
|
| Fair Value, Measurements, Recurring | U.S. Treasury securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
685,436
|
670,070
|
| Fair Value, Measurements, Recurring | Private label commercial MBS |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
25,535
|
26,827
|
| Fair Value, Measurements, Recurring | Private Label Collateralized Mortgage Obligations |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
164,403
|
166,724
|
| Fair Value, Measurements, Recurring | Asset-backed Securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
22,457
|
22,413
|
| Fair Value, Measurements, Recurring | Level 1 |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Equity warrants |
0
|
0
|
| Interest rate and economic contracts |
0
|
0
|
| Equity Securities, FV-NI |
1
|
1
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
685,436
|
670,070
|
| Other Borrowings |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Government agency and government-sponsored enterprise pass through securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Agency residential CMOs |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Collateralized loan obligations |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Municipal securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Agency commercial MBS |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | SBA securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Corporate Debt Securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | U.S. Treasury securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
685,436
|
670,070
|
| Fair Value, Measurements, Recurring | Level 1 | Private label commercial MBS |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Private Label Collateralized Mortgage Obligations |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 1 | Asset-backed Securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 2 |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Equity warrants |
0
|
0
|
| Interest rate and economic contracts |
7,025
|
7,814
|
| Equity Securities, FV-NI |
0
|
0
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
4,148,392
|
4,173,417
|
| Other Borrowings |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 2 | Government agency and government-sponsored enterprise pass through securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
2,249,080
|
2,242,042
|
| Fair Value, Measurements, Recurring | Level 2 | Agency residential CMOs |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
455,682
|
457,063
|
| Fair Value, Measurements, Recurring | Level 2 | Collateralized loan obligations |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
102,994
|
102,261
|
| Fair Value, Measurements, Recurring | Level 2 | Municipal securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
345,639
|
339,326
|
| Fair Value, Measurements, Recurring | Level 2 | Agency commercial MBS |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
491,681
|
487,606
|
| Fair Value, Measurements, Recurring | Level 2 | SBA securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
15,906
|
17,250
|
| Fair Value, Measurements, Recurring | Level 2 | Corporate Debt Securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
275,015
|
311,905
|
| Fair Value, Measurements, Recurring | Level 2 | U.S. Treasury securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 2 | Private label commercial MBS |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
25,535
|
26,827
|
| Fair Value, Measurements, Recurring | Level 2 | Private Label Collateralized Mortgage Obligations |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
164,403
|
166,724
|
| Fair Value, Measurements, Recurring | Level 2 | Asset-backed Securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
22,457
|
22,413
|
| Fair Value, Measurements, Recurring | Level 3 |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Equity warrants |
3,978
|
4,048
|
| Interest rate and economic contracts |
0
|
0
|
| Equity Securities, FV-NI |
0
|
0
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
14,779
|
0
|
| Other Borrowings |
128,375
|
132,030
|
| Fair Value, Measurements, Recurring | Level 3 | Government agency and government-sponsored enterprise pass through securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Agency residential CMOs |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Collateralized loan obligations |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Municipal securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Agency commercial MBS |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | SBA securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Corporate Debt Securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
14,779
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | U.S. Treasury securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Private label commercial MBS |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Private Label Collateralized Mortgage Obligations |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
0
|
0
|
| Fair Value, Measurements, Recurring | Level 3 | Asset-backed Securities |
|
|
| Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
|
|
| Securities available-for-sale, at fair value (amortized cost of $5,591,766 and $5,654,617, respectively) |
$ 0
|
$ 0
|