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Derivatives and Hedging Activities (Textual) (Details) - USD ($) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2019
Derivative [Line Items] |  |  |  |  |
Interest Receivable |  | $ 25,900,000 |  |  |
Derivative, Net Liability Position, Aggregate Fair Value |  | $ 88,300,000 |  |  | $ 26,000,000.0
Maximum Length of Time Hedged in Interest Rate Cash Flow Hedge |  | 4 years 7 months 6 days |  |  |
Gain (Loss) on Sales of Loans, Net |  | $ 4,500,000 | $ 705,000 |  |
Exposure to Institutional Counterparties |  | 57,300,000 |  |  | 25,400,000
Amortization Of Deferred Hedge Gains Losses |  | 0 |  |  |
Customer related positions |  | 143,700,000 |  |  | 51,000,000.0
Fair Value Hedges, Net |  | 0 |  |  | 0
Change in Fair Value on Loans Held for Sale |  | (914,000) | $ 1,000 | $ 1,000 |
Interest rate swaps |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Interest Receivable | [1],[2] | 574,000 |  |  | 350,000
Derivative, Notional Amount |  | 1,025,000,000 |  |  | 925,000,000
Interest Payable, Current | [1],[2] | $ 14,000 |  |  | $ 4,000
Interest rate collars on loans [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Derivative, Average Cap Interest Rate |  | 2.73% |  |  | 3.02%
Derivative, Average Floor Interest Rate |  | 2.20% |  |  | 2.51%
Derivative, Notional Amount |  | $ 400,000,000 |  |  | $ 400,000,000
Loan level swaps |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Interest Receivable | [1],[2] | 1,100,000 |  |  | 569,000
Interest Payable, Current | [1],[2] | 1,100,000 |  |  | $ 569,000
Interest Income [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months |  | (16,800,000) |  |  |
Interest Expense [Member] |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months |  | $ 587,000 |  |  |
[1] | All asset derivatives are located in other assets on the balance sheet.
[2] | Approximately $574,000 and $1.1 million of accrued interest receivable is included in the fair value of the interest rate and loan level asset derivatives, respectively, as of March 31, 2020. Accrued interest receivable of approximately and $350,000 and $569,000 was excluded from the fair value of the interest rate and loan level asset derivatives, respectively, as of December 31, 2019.

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