| **Other Intangibles - Narrative (Details) - USD ($) $ in Thousands** | 12 Months Ended |         |         |
|----------------------------------------------------------------------|-----------------|---------|---------|
||
| **Business Acquisition [Line Items]**                                |            |    |    |   |   |
| Intangible asset amortization                                        | $ 6,719         | $ 5,647 | $ 3,910 |   |   |
| IAB                                                                  |            |    |    |   |   |
| **Business Acquisition [Line Items]**                                |            |    |    |   |   |
| Core deposit intangible                                              |            |    |    | $ 17,403 |   |
| Arlington Bank                                                       |            |    |    |   |   |
| **Business Acquisition [Line Items]**                                |            |    |    |   |   |
| Core deposit intangible                                              |            |    |    |   | $ 4,526 |
| Core deposits | IAB                                                  |            |    |    |   |   |
| **Business Acquisition [Line Items]**                                |            |    |    |   |   |
| Core deposit intangible                                              |            |    |    | 13,638 |   |
| Core deposits | Arlington Bank                                       |            |    |    |   |   |
| **Business Acquisition [Line Items]**                                |            |    |    |   |   |
| Core deposit intangible                                              |            |    |    |   | $ 4,526 |
| Noncompete agreements | IAB                                          |            |    |    |   |   |
| **Business Acquisition [Line Items]**                                |            |    |    |   |   |
| Core deposit intangible                                              |            |    |    | $ 3,765 |   |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.
+ References
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|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.
+ References
No definition available.
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|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The amount of identifiable intangible assets recognized as of the acquisition date.
+ References
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