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Business Combinations - Estimated Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) | Feb. 14, 2022 | Feb. 22, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Mar. 31, 2021
--- | --- | --- | --- | --- | ---
Assets |  |  |  |  |
Goodwill |  |  | $ 140,412,000 | $ 111,853,000 |
Delta Bancshare Company |  |  |  |  |
Assets |  |  |  |  |
Cash and due from banks | $ 82,473,000 |  |  |  |
Investment securities | 182,123,000 |  |  |  |
Loans | 418,509,000 |  |  |  |
Allowance for loan losses | (863,000) |  |  |  |
Premises and equipment | 9,030,000 |  |  |  |
Goodwill | 28,558,000 |  |  |  |
Other assets | 7,774,000 |  |  |  |
Total assets acquired | 750,063,000 |  |  |  |
Liabilities and stockholders' equity |  |  |  |  |
Deposits | 560,378,000 |  |  |  |
Securities sold under agreements to repurchase | 35,523,000 |  |  |  |
FHLB advances | 45,075,000 |  |  |  |
Lease liability | 717,000 |  |  |  |
Other liabilities | 1,048,000 |  |  |  |
Total liabilities assumed | 642,741,000 |  |  |  |
Net assets acquired | 107,322,000 |  |  |  |
Consideration paid |  |  |  |  |
Consideration payable in cash | 15,150,000 |  |  |  |
Common stock | 92,172,000 |  |  |  |
Total consideration paid | 107,322,000 |  |  |  |
Delta Bancshare Company | Core Deposit Intangibles |  |  |  |  |
Assets |  |  |  |  |
Intangible assets | 5,920,000 |  |  |  |
Delta Bancshare Company | Bank Owned Life Insurance |  |  |  |  |
Assets |  |  |  |  |
Intangible assets | 15,822,000 |  |  |  |
Delta Bancshare Company | Right of Use Asset |  |  |  |  |
Assets |  |  |  |  |
Intangible assets | 717,000 |  |  |  |
Delta Bancshare Company | Acquired Book Value |  |  |  |  |
Assets |  |  |  |  |
Cash and due from banks | 82,473,000 |  |  |  |
Investment securities | 184,959,000 |  |  |  |
Loans | 426,433,000 |  |  |  |
Allowance for loan losses | (5,388,000) |  |  |  |
Premises and equipment | 5,522,000 |  |  |  |
Goodwill | 14,000 |  |  |  |
Other assets | 9,061,000 |  |  |  |
Total assets acquired | 718,896,000 |  |  |  |
Liabilities and stockholders' equity |  |  |  |  |
Deposits | 558,619,000 |  |  |  |
Securities sold under agreements to repurchase | 35,523,000 |  |  |  |
FHLB advances | 45,000,000 |  |  |  |
Lease liability | 0 |  |  |  |
Other liabilities | 2,209,000 |  |  |  |
Total liabilities assumed | 641,351,000 |  |  |  |
Net assets acquired | 77,545,000 |  |  |  |
Delta Bancshare Company | Acquired Book Value | Core Deposit Intangibles |  |  |  |  |
Assets |  |  |  |  |
Intangible assets | 0 |  |  |  |
Delta Bancshare Company | Acquired Book Value | Bank Owned Life Insurance |  |  |  |  |
Assets |  |  |  |  |
Intangible assets | 15,822,000 |  |  |  |
Delta Bancshare Company | Acquired Book Value | Right of Use Asset |  |  |  |  |
Assets |  |  |  |  |
Intangible assets | 0 |  |  |  |
Delta Bancshare Company | Fair Value Adjustments |  |  |  |  |
Assets |  |  |  |  |
Cash and due from banks | 0 |  |  |  |
Investment securities | (2,836,000) |  |  |  |
Loans | (7,924,000) |  |  |  |
Allowance for loan losses | 4,525,000 |  |  |  |
Premises and equipment | 3,508,000 |  |  |  |
Goodwill | 28,544,000 |  |  |  |
Other assets | (1,287,000) |  |  |  |
Total assets acquired | 31,167,000 |  |  |  |
Liabilities and stockholders' equity |  |  |  |  |
Deposits | 1,759,000 |  |  |  |
Securities sold under agreements to repurchase | 0 |  |  |  |
FHLB advances | 75,000 |  |  |  |
Lease liability | 717,000 |  |  |  |
Other liabilities | (1,161,000) |  |  |  |
Total liabilities assumed | 1,390,000 |  |  |  |
Net assets acquired | 29,777,000 |  |  |  |
Delta Bancshare Company | Fair Value Adjustments | Core Deposit Intangibles |  |  |  |  |
Assets |  |  |  |  |
Intangible assets | 5,920,000 |  |  |  |
Delta Bancshare Company | Fair Value Adjustments | Bank Owned Life Insurance |  |  |  |  |
Assets |  |  |  |  |
Intangible assets | 0 |  |  |  |
Delta Bancshare Company | Fair Value Adjustments | Right of Use Asset |  |  |  |  |
Assets |  |  |  |  |
Intangible assets | $ 717,000 |  |  |  |
LINCO Bancshares, Inc. |  |  |  |  |
Assets |  |  |  |  |
Cash and due from banks |  | $ 130,561,000 |  |  |
Investment securities |  | 119,498,000 |  |  |
Loans |  | 828,976,000 |  |  |
Allowance for loan losses |  | (2,073,000) |  |  |
Other real estate owned |  | 9,350,000 |  |  |
Premises and equipment |  | 29,800,000 |  |  |
Goodwill |  | 5,449,000 | $ 5,400,000 |  | $ 8,900,000
Other assets |  | 46,196,000 |  |  |
Total assets acquired |  | 1,170,699,000 |  |  |
Liabilities and stockholders' equity |  |  |  |  |
Deposits |  | 990,410,000 |  |  |
Securities sold under agreements to repurchase |  | 0 |  |  |
FHLB advances |  | 27,916,000 |  |  |
Other borrowings |  | 0 |  |  |
Lease liability |  | 794,000 |  |  |
Other liabilities |  | 3,888,000 |  |  |
Total liabilities assumed |  | 1,023,008,000 |  |  |
Net assets acquired |  | 147,691,000 |  |  |
Consideration paid |  |  |  |  |
Consideration payable in cash |  | 103,500,000 |  |  |
Common stock |  | 44,191,000 |  |  |
Total consideration paid |  | 147,691,000 |  |  |
LINCO Bancshares, Inc. | Core Deposit Intangibles |  |  |  |  |
Assets |  |  |  |  |
Intangible assets |  | 2,148,000 |  |  |
LINCO Bancshares, Inc. | Right of Use Asset |  |  |  |  |
Assets |  |  |  |  |
Intangible assets |  | 794,000 |  |  |
LINCO Bancshares, Inc. | Acquired Book Value |  |  |  |  |
Assets |  |  |  |  |
Cash and due from banks |  | 130,561,000 |  |  |
Investment securities |  | 119,234,000 |  |  |
Loans |  | 838,377,000 |  |  |
Allowance for loan losses |  | (8,656,000) |  |  |
Other real estate owned |  | 8,435,000 |  |  |
Premises and equipment |  | 23,440,000 |  |  |
Goodwill |  | 20,503,000 |  |  |
Other assets |  | 43,697,000 |  |  |
Total assets acquired |  | 1,175,714,000 |  |  |
Liabilities and stockholders' equity |  |  |  |  |
Deposits |  | 988,329,000 |  |  |
Securities sold under agreements to repurchase |  | 0 |  |  |
FHLB advances |  | 26,941,000 |  |  |
Other borrowings |  | 0 |  |  |
Lease liability |  | 0 |  |  |
Other liabilities |  | 4,498,000 |  |  |
Total liabilities assumed |  | 1,019,768,000 |  |  |
Net assets acquired |  | 155,946,000 |  |  |
LINCO Bancshares, Inc. | Acquired Book Value | Core Deposit Intangibles |  |  |  |  |
Assets |  |  |  |  |
Intangible assets |  | 123,000 |  |  |
LINCO Bancshares, Inc. | Acquired Book Value | Right of Use Asset |  |  |  |  |
Assets |  |  |  |  |
Intangible assets |  | 0 |  |  |
LINCO Bancshares, Inc. | Fair Value Adjustments |  |  |  |  |
Assets |  |  |  |  |
Cash and due from banks |  | 0 |  |  |
Investment securities |  | 264,000 |  |  |
Loans |  | (9,401,000) |  |  |
Allowance for loan losses |  | 6,583,000 |  |  |
Other real estate owned |  | 915,000 |  |  |
Premises and equipment |  | 6,360,000 |  |  |
Goodwill |  | (15,054,000) |  |  |
Other assets |  | 2,499,000 |  |  |
Total assets acquired |  | (5,015,000) |  |  |
Liabilities and stockholders' equity |  |  |  |  |
Deposits |  | 2,081,000 |  |  |
Securities sold under agreements to repurchase |  | 0 |  |  |
FHLB advances |  | 975,000 |  |  |
Other borrowings |  | 0 |  |  |
Lease liability |  | 794,000 |  |  |
Other liabilities |  | (610,000) |  |  |
Total liabilities assumed |  | 3,240,000 |  |  |
Net assets acquired |  | (8,255,000) |  |  |
LINCO Bancshares, Inc. | Fair Value Adjustments | Core Deposit Intangibles |  |  |  |  |
Assets |  |  |  |  |
Intangible assets |  | 2,025,000 |  |  |
LINCO Bancshares, Inc. | Fair Value Adjustments | Right of Use Asset |  |  |  |  |
Assets |  |  |  |  |
Intangible assets |  | $ 794,000 |  |  |

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