Regulatory Capital - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|---|
Jan. 01, 2020 |
Jun. 30, 2024 |
Jun. 30, 2023 |
Jun. 30, 2024 |
Jun. 30, 2023 |
Dec. 31, 2023 |
Mar. 31, 2024 |
Mar. 31, 2023 |
Dec. 31, 2022 |
|
| Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] | |||||||||
| Allowance for credit losses | $ 1,269,652 | $ 1,364,716 | $ 1,269,652 | $ 1,364,716 | $ 1,339,772 | $ 1,350,058 | $ 1,479,306 | $ 1,357,075 | |
| Liability for unfunded commitments | 49,479 | 62,600 | 49,479 | 62,600 | 112,962 | $ 32,034 | $ 32,720 | 124,924 | |
| Retained earnings | 4,107,980 | 4,107,980 | 3,624,859 | ||||||
| Unrealized gain (loss) | (110,000) | (115,000) | |||||||
| Unrealized gain (loss), tax benefit | (35,000) | (37,000) | |||||||
| Dividends | 138,000 | $ 300,000 | 298,000 | $ 300,000 | |||||
| Adjustments | |||||||||
| Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] | |||||||||
| Period of deferment | 2 years | ||||||||
| Percentage amount deferred per year | 25.00% | ||||||||
| Percentage amount phased in during year | 25.00% | ||||||||
| Allowance for credit losses | $ 1,100,000 | (259,536) | (259,536) | (259,536) | (259,536) | ||||
| Liability for unfunded commitments | 116,000 | (26,095) | (26,095) | (26,094) | (26,094) | ||||
| Deferred tax asset | 306,000 | (76,543) | (76,543) | (76,542) | (76,542) | ||||
| Retained earnings | $ 953,000 | $ (209,088) | $ (209,088) | $ (209,088) | $ (209,088) | ||||