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Derivative Financial Instruments - Narrative (Details) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2020 USD ($) interest_rate_swap instrument | Dec. 31, 2019 USD ($) interest_rate_swap
Derivative [Line Items] |  |
Estimated amount to be transferred from accumulated other comprehensive income to earnings | $ 1,046 |
Termination value of derivatives in a net liability position | 87,754 |
Derivative collateral posted | 80,855 |
Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Notional amount of interest rate derivatives | $ 817,463 | $ 692,287
Federal Home Loan Bank Advances |  |
Derivative [Line Items] |  |
Number of debt instruments held | instrument | 2 |
Interest rate contracts | Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Increase in derivative assets | $ 56,800 |
Increase in derivative liabilities | 57,900 |
Increase in outstanding notional balance | $ 125,200 |
Cash Flow Hedging | Interest Rate Swap |  |
Derivative [Line Items] |  |
Number of interest rate derivatives held | interest_rate_swap | 4 | 4
Notional amount of interest rate derivatives | $ 46,000 | $ 46,000
Cash Flow Hedging | Interest Rate Swap | Trust Preferred Debt |  |
Derivative [Line Items] |  |
Notional amount of interest rate derivatives | 26,000 |
Cash Flow Hedging | Interest Rate Swap | Federal Home Loan Bank Advances |  |
Derivative [Line Items] |  |
Notional amount of interest rate derivatives | $ 20,000 |

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