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Goodwill and Intangible Assets (Details) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) $ / loans Rate | Dec. 31, 2020 USD ($) $ / loans Rate | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($)
Goodwill [Roll Forward] |  |  |  |
Beginning goodwill | $ 350,298 | $ 349,398 |  |
Goodwill, Out Of Period Adjustment | (4,234) | 0 |  |
Ending goodwill | 346,064 | 350,298 | $ 349,398 |
Servicing Asset at Amortized Cost | 23,357 | 18,426 | 22,963 | $ 21,396
Servicing Asset at Amortized Cost, Additions | 10,556 | 8,006 | 6,149 |
Amortization | (8,727) | (8,400) | (6,233) |
Valuation Allowance for Impairment of Recognized Servicing Assets, Provisions (Recoveries) | (3,102) | 4,143 | 222 |
Residential Mortgage Loans Serviced | $ 3,390,000 | $ 3,310,000 | 3,380,000 |
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Prepayment Speed | Rate | 15.69% | 20.62% |  |
Contractually Specified Servicing Fee, Late Fee, and Ancillary Fee Earned in Exchange for Servicing Financial Asset | $ 8,600 | $ 8,500 | 7,900 |
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Cost to Service Loans | $ / loans | 87.58 | 87.58 |  |
Useful life (years) | 5 years 7 months 6 days |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |  |
Beginning balance | $ 29,667 | $ 43,386 |  |
Amortization | (10,948) | (14,255) |  |
Ending balance | 18,719 | 29,667 | 43,386 |
Finite-Lived Intangible Assets [Abstract] |  |  |  |
Gross balance | 127,842 | 127,842 |  |
Accumulated amortization | (109,123) | (98,175) |  |
Carrying value | 18,719 | 29,667 |  |
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |  |  |
Finite-Lived Intangible Asset, Expected Amortization, Year One |  | 7,743 |  |
Finite-Lived Intangible Asset, Expected Amortization, Year Two |  | 5,129 |  |
Finite-Lived Intangible Asset, Expected Amortization, Year Three |  | 2,659 |  |
Finite-Lived Intangible Asset, Expected Amortization, Year Four |  | 1,374 |  |
Finite-Lived Intangible Asset, Expected Amortization, Year Five |  | 1,814 |  |
Community Financial Holding Co. Inc. |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Goodwill acquired | 0 | 686 |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |  |
Intangible assets acquired | 0 | 536 |  |
Entegra Financial |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Business combination, measurement period adjustment, amount | 0 | 214 |  |
Servicing Asset at Amortized Cost, Additions | $ 0 | $ 0 | $ 1,873 |
Conventional fixed loans |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate | Rate | 8.51% | 7.92% |  |
All loans and leases excluding conventional fixed loans [Member] |  |  |  |
Goodwill [Roll Forward] |  |  |  |
Servicing Assets and Servicing Liabilities at Fair Value, Assumptions Used to Estimate Fair Value, Discount Rate | Rate | 9.51% | 8.92% |  |

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