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Goodwill and Intangible Assets - Narrative (Details) - USD ($) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Aug. 01, 2021 | May 01, 2019 | Dec. 31, 2021 | Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill acquired |  |  | $ 0 | $ 485
Amortization expense of intangibles |  |  | 1,200 | 785
SouthCrest Financial Group, Inc. |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill acquired | $ 35,000 |  |  |
SouthCrest Financial Group, Inc. | Core deposit intangible |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-lived intangible assets acquired | $ 4,000 |  |  |
Insurance Acquisitions |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill acquired |  |  | 1,900 |
Insurance Acquisitions | Customer deposit intangibles |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-lived intangible assets acquired |  |  | $ 2,300 |
LBC Bancshares, Inc |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill acquired |  | $ 15,700 |  |
Goodwill, subsequent adjustments |  |  |  | $ 485
LBC Bancshares, Inc | Core deposit intangible |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Finite-lived intangible assets acquired |  | 3,100 |  |
PFB Mortgage |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |
Goodwill acquired |  | $ 541 |  |

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- 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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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