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Derivative Financial Instruments (Details) - USD ($) | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2009
Derivative Financial Instruments |  |  |  |  |
Notional Amount | $ 2,051,663,000 | $ 889,162,000 |  |  |
Outstanding advances | 700,000,000.0 | 150,000,000.0 |  |  |
Estimated Fair Value Gain | 16,252,000 | 5,090,000 |  |  |
Estimated Fair Value Loss | $ 31,273,000 | 4,421,000 |  |  |
Variable rate basis, variable rate receivable on notional amount | three-month LIBOR |  |  |  |
After-tax unrealized gain on cash flow hedge in other comprehensive income | $ 10,700,000 | 154,000 |  |  |
Cash flow hedge liability |  | 48,000 |  |  |
Ineffectiveness in the cash flow hedge | 0 | 0 |  |  |
Gain or loss recorded | 0 | 0 |  |  |
Interest Rate Derivative Assets, at Fair Value | 15,300,000 | 3,800,000 |  |  |
Interest Rate Derivative Liabilities, at Fair Value | 16,500,000 | 4,300,000 |  |  |
Interest Rate Derivatives, at Fair Value, Net | 1,100,000 | 499,000 |  |  |
Other Liabilities. |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Cash flow hedge liability | 13,800,000 |  |  |  |
Junior Subordinated Debt |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Collateral provided | 300,000 |  |  |  |
FHLB Advances |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Collateral provided | 22,600,000 |  |  |  |
Mortgage loan pipeline |  |  |  |  |
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments |  |  |  |  |
Obligation | 80,785,000 | 50,442,000 |  |  |
Expected closures |  |  |  |  |
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments |  |  |  |  |
Obligation | 60,588,000 | 37,832,000 |  |  |
Cash flow hedge | Borrower |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Collateral provided | 26,400,000 |  |  |  |
Cash flow hedge | FHLB Advances - One |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount |  |  |  | $ 350,000,000 |
Outstanding advances |  |  |  | 150,000,000 |
Cash flow hedge | FHLB Advances - Two |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount |  |  |  | 150,000,000 |
Outstanding advances |  |  |  | 150,000,000 |
Cash flow hedge | FHLB Advances - Three |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount |  |  | $ 200,000,000 | 350,000,000 |
Interest rate contracts |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | 1,100,000 | 737,000,000.0 |  |  |
Interest rate contracts | LIBOR |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | $ 8,000,000.0 |  |  |  |
Interest rate contracts | Cash flow hedge |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount |  |  |  |  | $ 8,000,000.0
Interest rate contracts | Cash flow hedge | LIBOR |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Fixed rate payable on notional amount (as a percent) | 4.06% |  |  |  |
Mortgage servicing rights hedging |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Estimated gain (loss) on fair value of open contracts related to mortgage servicing rights | $ 789,000 | (1,200,000) |  |  |
Mortgage servicing rights hedging | Non-designated hedges |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | 133,000,000.0 | 94,500,000 |  |  |
Mortgage servicing rights hedging | Non-designated hedges | Other Assets. |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | 133,000,000 | 94,500,000 |  |  |
Estimated Fair Value Gain |  | 1,184,000 |  |  |
Estimated Fair Value Loss | 789,000 |  |  |  |
Mortgage loan pipeline commitments |  |  |  |  |
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments |  |  |  |  |
Obligation | 1,160,000 | 705,000 |  |  |
Forward commitments |  |  |  |  |
Obligation under forward commitments, the fair value of those obligations along with the fair value of derivative instruments associated with forward commitments |  |  |  |  |
Obligation | 87,773,000 | 46,812,000 |  |  |
Fair value of forward commitments | 258,000 | 621,000 |  |  |
Forward commitments | Non-designated hedges | Other Assets. |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | 87,773,000 | 46,812,000 |  |  |
Estimated Fair Value Gain | 902,000 | 83,000 |  |  |
Interest rate swap |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Estimated Fair Value Gain |  | 207,000 |  |  |
Estimated Fair Value Loss | 646,000 |  |  |  |
Interest rate swap | Cash flow hedge | Other Liabilities. | Counterparty |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | 8,000,000.0 | 8,000,000 |  |  |
Estimated Fair Value Loss |  | 48,000 |  |  |
Interest rate swap | Cash flow hedge | FHLB Advances | Other Liabilities. | Counterparty |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | 700,000,000 |  |  |  |
Estimated Fair Value Loss | $ 13,791,000 |  |  |  |
Interest rate swap | Cash flow hedge | FHLB Advances - One |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount |  |  |  | $ 350,000,000 |
Fixed rate payable on notional amount (as a percent) |  |  | 2.44% |  |
Interest rate swap | Cash flow hedge | FHLB Advances - Two |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount |  |  | $ 150,000,000 |  |
Fixed rate payable on notional amount (as a percent) |  |  | 2.21% |  |
Interest rate swap | Cash flow hedge | FHLB Advances - Three |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount |  |  | $ 200,000,000 |  |
Fixed rate payable on notional amount (as a percent) |  |  | 1.89% |  |
Interest rate swap | Cash flow hedge | LIBOR | FHLB Advances - One |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Variable rate (as a percent) | 1.91% |  |  |  |
Interest rate swap | Cash flow hedge | LIBOR | FHLB Advances - Two |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Variable rate (as a percent) | 1.96% |  |  |  |
Interest rate swap | Cash flow hedge | LIBOR | FHLB Advances - Three |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Variable rate (as a percent) | 1.91% |  |  |  |
Interest rate swap | Fair Value Hedging | Counterparty |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | $ 2,800,000 |  |  |  |
Interest rate swap | Fair Value Hedging | Other Assets. | Counterparty |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | 2,754,000 | 2,824,000 |  |  |
Estimated Fair Value Loss | 199,000 | 51,000 |  |  |
Interest rate swap | Non-designated hedges | Other Assets and Other Liabilities | Borrower |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | 564,068,000 | 368,513,000 |  |  |
Estimated Fair Value Gain | 15,277,000 | 3,105,000 |  |  |
Estimated Fair Value Loss | 1,019,000 | 4,193,000 |  |  |
Interest rate swap | Non-designated hedges | Other Assets and Other Liabilities | Counterparty |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Notional Amount | 564,068,000 | 368,513,000 |  |  |
Estimated Fair Value Gain | 73,000 | 718,000 |  |  |
Estimated Fair Value Loss | 15,475,000 | 129,000 |  |  |
Foreign exchange contract |  |  |  |  |
Derivative Financial Instruments |  |  |  |  |
Gain or loss recorded | $ 0 | $ 0 |  |  |

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