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Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Details) |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 06, 2020 $ / shares shares | Jan. 01, 2020 USD ($) | Dec. 31, 2021 USD ($) segment unit_Facility $ / shares shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares | Jul. 16, 2019 shares | Dec. 31, 2018 USD ($)
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
Full service facilities maintained by bank | unit_Facility |  |  | 78 |  |  |  |
Accrued Interest Receivable |  |  | $ 11,500,000 | $ 13,300,000 |  |  |
Minimum period required for satisfactory performance to return loan from non-accrual to accrual status |  |  | 6 months |  |  |  |
Commercial loans as a percentage of total loan |  |  | 60.00% |  |  |  |
Residential real estate loans as a percentage of total loan |  |  | 17.00% |  |  |  |
Installment loans as a percentage of total loan |  |  | 20.00% |  |  |  |
Mortgage warehouse loans as a percentage of total loan |  |  | 3.00% |  |  |  |
Investment in limited partnerships |  |  | $ 2,300,000 | 2,300,000 |  |  |
Core deposit intangibles |  |  | 20,900,000 |  |  |  |
Goodwill |  |  | $ 154,572,000 | $ 151,238,000 | $ 151,238,000 |  |
Uncertain tax positions recognized |  |  | 50.00% |  |  |  |
Shares, non-dilutive (in shares) | shares |  |  | 140,955 | 278,776 | 120,341 |  |
Number of shares authorized to be repurchased | shares |  |  |  |  |  | 2,250,000 |
Number of shares repurchased | shares | 1,000,000 |  | 803,349 |  |  |  |
Average price per share repurchased | $ / shares | $ 15.19 |  | $ 16.89 |  |  |  |
Amount available for payment of dividend |  |  | $ 108,500,000 |  |  |  |
Compensation expense |  |  | $ 1,800,000 | $ 1,300,000 | $ 920,000 |  |
Number of business segment | segment |  |  | 1 |  |  |  |
Stockholders’ Equity |  |  | $ 723,209,000 | 692,216,000 | 656,023,000 |  | $ 491,992,000
Net income |  |  | 87,091,000 | 68,499,000 | 66,538,000 |  |
PCD loans charge–offs |  |  |  | 2,786,000 |  |  |
Revision of Prior Period, Change in Accounting Principle, Adjustment |  |  |  |  |  |  |
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
Net income |  |  | $ 0 |  |  |  |
Revision of Prior Period, Accounting Standards Update, Adjustment |  |  |  |  |  |  |
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
Stockholders’ Equity |  |  |  | $ 15,600,000 | $ (15,635,000) |  |
Measurement Input, Discount Rate |  |  |  |  |  |  |
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
Factor considered to be significant for fair value measurement |  |  | 0.10 |  |  |  |
Minimum |  |  |  |  |  |  |
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
Loan delinquency period |  |  | 90 days |  |  |  |
Maximum |  |  |  |  |  |  |
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
Allowance for loan losses charge down family first and junior lien mortgages past due period |  |  | 180 days |  |  |  |
Allowance for loan losses charge down unsecured open end loans past due period |  |  | 90 days |  |  |  |
Buildings and improvements | Minimum |  |  |  |  |  |  |
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
Useful Life for depreciation |  |  | 3 years |  |  |  |
Buildings and improvements | Maximum |  |  |  |  |  |  |
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
Useful Life for depreciation |  |  | 40 years |  |  |  |
Furniture and equipment | Minimum |  |  |  |  |  |  |
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
Useful Life for depreciation |  |  | 2 years |  |  |  |
Furniture and equipment | Maximum |  |  |  |  |  |  |
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
Useful Life for depreciation |  |  | 20 years |  |  |  |
Accounting Standards Update 2016-13 |  |  |  |  |  |  |
Schedule Of Accounting Policies [Line Items] |  |  |  |  |  |  |
PCD loans charge–offs |  | $ 2,800,000 |  |  |  |  |

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