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Derivatives (Derivatives Not Designated as Hedging Instruments - Foreign Exchange Contracts) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Derivative [Line Items] |  |
Derivative assets - Fair value | $ 694,010 | $ 602,754
Derivative liabilities - Fair value | 561,788 | 424,828
Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 20,874,985 | 21,341,158
Derivative assets - Fair value | 693,852 | 602,754
Derivative liabilities - Fair value | 560,639 | 422,729
Foreign exchange contracts | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 3,047,846 | 3,108,488
Derivative assets - Fair value | 31,717 | 30,300
Derivative liabilities - Fair value | 24,313 | 22,524
Foreign exchange contracts | Customer Counterparty | Forwards and spot | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 1,573,945 | 1,522,888
Derivative assets - Fair value | 18,558 | 17,575
Derivative liabilities - Fair value | 20,340 | 17,928
Foreign exchange contracts | Customer Counterparty | Swaps | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 66,696 | 13,590
Derivative assets - Fair value | 321 | 872
Derivative liabilities - Fair value | 76 | 91
Foreign exchange contracts | Customer Counterparty | Written options | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 169,434 | 117,729
Derivative assets - Fair value | 22 | 0
Derivative liabilities - Fair value | 10 | 574
Foreign exchange contracts | Customer Counterparty | Collars | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 2,084 |
Derivative assets - Fair value | 0 |
Derivative liabilities - Fair value | 8 |
Foreign exchange contracts | Customer Counterparty | Foreign exchange contracts | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 1,812,159 | 1,654,207
Derivative assets - Fair value | 18,901 | 18,447
Derivative liabilities - Fair value | 20,434 | 18,593
Foreign exchange contracts | Financial Counterparty | Forwards and spot | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 249,814 | 145,197
Derivative assets - Fair value | 1,913 | 1,230
Derivative liabilities - Fair value | 1,653 | 273
Foreign exchange contracts | Financial Counterparty | Swaps | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 814,355 | 1,191,355
Derivative assets - Fair value | 10,885 | 10,049
Derivative liabilities - Fair value | 2,204 | 3,658
Foreign exchange contracts | Financial Counterparty | Purchased options | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 169,434 | 117,729
Derivative assets - Fair value | 10 | 574
Derivative liabilities - Fair value | 22 | 0
Foreign exchange contracts | Financial Counterparty | Collars | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 2,084 |
Derivative assets - Fair value | 8 |
Derivative liabilities - Fair value | 0 |
Foreign exchange contracts | Financial Counterparty | Foreign exchange contracts | Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Notional Amount | 1,235,687 | 1,454,281
Derivative assets - Fair value | 12,816 | 11,853
Derivative liabilities - Fair value | $ 3,879 | $ 3,931

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