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Derivatives and Hedging Activities (FV of Derivative Financial Instruments and Classification on Balance Sheet) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Total |  | $ 76,705 |  | $ 26,113
Total |  | 53,715 |  | 17,523
Other Assets [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value | [1] | 55,245 |  | 17,355
Total | [1] |  |  | 26,310
Other Liabilities [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value | [2] | 53,726 |  | 17,132
Total | [2] | 53,923 |  | 17,523
Interest rate derivatives | Derivatives designated as hedges: [Member] | Other Assets [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Interest Rate Derivative Assets, at Fair Value | [1] | 23,140 |  | 8,955
Interest rate derivatives | Derivatives designated as hedges: [Member] | Other Liabilities [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Interest rate derivatives | [2] | 197 |  | 391
Loan level swaps | Other Assets [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Total | [1] | 52,374 |  | 15,580
Loan level swaps | Other Liabilities [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Total | [2] | 52,369 |  | 15,584
Foreign exchange contracts | Other Assets [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Total | [1] | 1,191 |  | 1,578
Foreign exchange contracts | Other Liabilities [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Total | [2] | 1,149 |  | 1,548
Mortgage Derivatives | Derivatives not designated as hedges: [Member] | Other Assets [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Interest rate lock commitments | [1] | 1,680 |  | 91
Forward sale hedge commitments | [1] | 0 |  | 106
Derivative Instrument Not Designated as a Hedge, Forward Sale Hedge Commitment, Asset at Fair Value | [1] | 0 |  | 0
Mortgage Derivatives | Derivatives not designated as hedges: [Member] | Other Liabilities [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Interest rate lock commitments | [2] | 0 |  | 0
Forward sale hedge commitments | [2] | 12 |  | 0
Derivative Instrument Not Designated as a Hedge, Forward Sale Hedge Commitment, Liability at Fair Value | [2] | 196 |  | 0
Derivative instruments | Fair Value, Recurring [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Total |  | 78,385 |  | 26,310
Derivative instruments | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair value of derivative financial instruments as well as their classification on the balance sheet |  |  |  |
Total |  | $ 78,385 | [1] | $ 26,310
[1] | All asset derivatives are located in other assets on the balance sheet
[2] | All liability derivatives are located in other liabilities on the balance sheet

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