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Derivatives - Gains (Losses) in Cash Flow Hedge and Net Investment Hedge (Details) - Derivative instruments designated as hedging instruments - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Interest rate contracts | Cash Flow Hedging |  |  |  |
Derivative [Line Items] |  |  |  |
Losses recognized in AOCI: | $ (96,457) | $ (7,837) | $ (66,614) | $ (40,446)
Gains (losses) reclassified from AOCI into earnings: | (20,252) | 1,120 | (30,896) | 3,220
Interest rate contracts | Cash Flow Hedging | Interest expense (for cash flow hedges on borrowings) |  |  |  |
Derivative [Line Items] |  |  |  |
Gains (losses) reclassified from AOCI into earnings: |  | 308 |  | 135
Interest rate contracts | Cash Flow Hedging | Interest and dividend income (for cash flow hedges on loans) |  |  |  |
Derivative [Line Items] |  |  |  |
Gains (losses) reclassified from AOCI into earnings: | (20,252) | 812 | (33,206) | 3,085
Interest rate contracts | Cash Flow Hedging | Noninterest income |  |  |  |
Derivative [Line Items] |  |  |  |
Gains (losses) reclassified from AOCI into earnings: |  | 0 |  | 0
Foreign exchange contracts | Net Investment Hedging |  |  |  |
Derivative [Line Items] |  |  |  |
Gains recognized in AOCI | 3,899 | $ 3,255 | 2,823 | $ 1,684
Interest rate swap | Cash Flow Hedging | Interest expense (for cash flow hedges on borrowings) |  |  |  |
Derivative [Line Items] |  |  |  |
Gains (losses) reclassified from AOCI into earnings: | 0 |  | 696 |
Interest rate swap | Cash Flow Hedging | Noninterest income |  |  |  |
Derivative [Line Items] |  |  |  |
Gains (losses) reclassified from AOCI into earnings: | $ 0 |  | $ 1,614 |

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- Definition Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-11 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4C Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480627/815-20-45-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-10A + Details
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