Goodwill and Core Deposits and Other Intangibles - Summary of Changes in Carrying Amount and Accumulated Amortization of Company's Goodwill and Core Deposits and Other Intangibles (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Goodwill | |||||||
| Goodwill | $ 1,410,211 | $ 1,410,211 | $ 1,398,253 | $ 1,398,253 | $ 1,398,253 | ||
| Acquisition of Mountain Commerce Bancorp, Inc. | 11,958 | 0 | |||||
| Core Deposit Intangibles | |||||||
| Balance, beginning of period | 32,293 | 36,255 | $ 40,327 | 40,327 | |||
| Acquisition of Mountain Commerce Bancorp, Inc. | 38,075 | 0 | |||||
| Amortization expense | (2,889) | $ (2,025) | (4,827) | (3,962) | (4,072) | ||
| Balance, end of year | $ 65,541 | $ 36,255 | $ 65,541 | $ 32,293 | $ 36,255 | $ 32,293 | |
| X | ||||||||||
- Definition Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount, after accumulated amortization, of finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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| X | ||||||||||
- Definition Amount of increase in finite-lived intangible asset acquired in business combination, asset acquisition, and from joint venture formation. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after accumulated impairment loss, of asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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