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Investment Securities Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Mar. 31, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | May 01, 2022 | Dec. 31, 2021
Schedule of Investments [Line Items] |  |  |  |  |
Marketable Securities, Unrealized Gain (Loss) | $ (400) |  |  |  |
Proceeds from sales of AFS securities |  | $ 196,407 | $ 125,811 |  |
Debt Securities, Held-to-Maturity, Fair Value |  | 1,141,710 |  |  | $ 965,867
fair value of AFS securities transferred to HTM |  |  |  | $ 415,200 |
Amortize value of securities transferred from AFS to HTM |  |  |  | $ 479,000 |
Visa |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Gain on sale of shares | 34,000 |  |  |  |
Auction Rate Securities [Member] |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Proceeds from sales of AFS securities | $ 24,600 |  |  |  |
Collateral Pledged [Member] |  |  |  |  |
Schedule of Investments [Line Items] |  |  |  |  |
Securities pledged as collateral |  | $ 1,300,000 |  |  | $ 2,500,000

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