Loans and Leases (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2020 |
Dec. 31, 2019 |
Mar. 31, 2019 |
|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Unamortized deferred loan origination fees and costs | $ 14.9 | $ 15.7 | |
| Percentage of loans to aggregate outstanding amount in the greater New York/New Jersey Metropolitan area and northeastern states | 27.80% | ||
| Percentage of loans to aggregate outstanding amount in Other areas of the United States | 72.20% | ||
| Loans and leases pledged as collateral | $ 3,000.0 | $ 3,000.0 | |
| Loans And Leases Receivable | |||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | |||
| Accrued interest receivable | $ 18.4 | $ 17.4 |