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v3.23.1

Goodwill and Other Intangible Assets - Changes in Goodwill and Other Intangibles (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Jun. 30, 2022 | Dec. 31, 2022
Finite-lived Intangible Assets [Roll Forward] |  |  |  |
Core deposit premiums, beginning of period | $ 128,951 |  |  |
Amortization | (4,096) | $ (3,486) |  |
Core deposit premiums, end of period | 124,854 |  |  | $ 128,951
Spirit of Texas Bancshares, Inc. |  |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |  |
Core deposit premiums, beginning of period | 36,500 |  |  |
Core deposit premiums, end of period |  |  |  | 36,500
Core Deposit Premium |  |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |  |
Core deposit premiums, beginning of period | 116,016 | 93,862 | $ 93,862 | 93,862
Acquisitions | 0 |  | 36,500 |
Amortization | (3,689) |  | (14,346) |
Core deposit premiums, end of period | 112,327 |  |  | 116,016
Books of Business Intangible |  |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |  |
Core deposit premiums, beginning of period | 12,935 | $ 12,373 | 12,373 | 12,373
Acquisitions | 0 |  | 2,131 | 2,100
Amortization | (408) |  | $ (1,569) |
Core deposit premiums, end of period | $ 12,527 |  |  | $ 12,935

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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 926 -SubTopic 20 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=120154696&loc=d3e54445-107959 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)(1) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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