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Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Nov. 20, 2021 | Oct. 08, 2021 | Sep. 30, 2022 | Dec. 31, 2021 | Nov. 19, 2021 | Oct. 07, 2021
--- | --- | --- | --- | --- | --- | ---
Liabilities Assumed |  |  |  |  |  |
Goodwill |  |  | $ 1,309,000 | $ 1,146,007 |  |
Spirit of Texas Bancshares, Inc. |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Cash and due from banks | $ 277,790 |  |  |  | $ 277,790 |
Investment securities | 348,687 |  |  |  | 362,088 |
Loans acquired | 2,294,160 |  |  |  | 2,314,085 |
Allowance for credit losses on loans | (5,100) |  |  |  | (17,005) |
Premises and equipment | 65,106 |  |  |  | 84,135 |
Bank owned life insurance | 36,890 |  |  |  | 36,890 |
Goodwill | 0 |  |  |  | 77,681 |
Other assets | 61,985 |  |  |  | 58,403 |
Total assets acquired | 3,118,149 |  |  |  | 3,200,312 |
Liabilities Assumed |  |  |  |  |  |
Noninterest bearing transaction accounts | 825,063 |  |  |  | 825,228 |
Interest bearing transaction accounts and savings deposits | 1,383,663 |  |  |  | 1,383,663 |
Time deposits | 510,290 |  |  |  | 509,209 |
Total deposits | 2,719,016 |  |  |  | 2,718,100 |
Other borrowings | 38,050 |  |  |  | 37,547 |
Subordinated debentures | 37,370 |  |  |  | 36,491 |
Accrued interest and other liabilities | 19,749 |  |  |  | 23,667 |
Total liabilities assumed | 2,814,185 |  |  |  | 2,815,805 |
Equity | 0 |  |  |  | 384,507 |
Total liabilities and equity assumed | 2,814,185 |  |  |  | 3,200,312 |
Net assets acquired | 303,964 |  |  |  |  |
Purchase price | 466,311 |  |  |  |  |
Goodwill | 162,347 |  |  |  | 162,300 |
Spirit of Texas Bancshares, Inc. | Fair Value Adjustments |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Cash and due from banks | 0 |  |  |  |  |
Investment securities | (13,401) |  |  |  |  |
Loans acquired | (19,925) |  |  |  |  |
Allowance for credit losses on loans | 11,905 |  |  |  |  |
Premises and equipment | (19,029) |  |  |  |  |
Bank owned life insurance | 0 |  |  |  |  |
Goodwill | (77,681) |  |  |  |  |
Other assets | 3,582 |  |  |  |  |
Total assets acquired | (82,163) |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |
Noninterest bearing transaction accounts | (165) |  |  |  |  |
Interest bearing transaction accounts and savings deposits | 0 |  |  |  |  |
Time deposits | 1,081 |  |  |  |  |
Total deposits | 916 |  |  |  |  |
Other borrowings | 503 |  |  |  |  |
Subordinated debentures | 879 |  |  |  |  |
Accrued interest and other liabilities | (3,918) |  |  |  |  |
Total liabilities assumed | (1,620) |  |  |  |  |
Equity | (384,507) |  |  |  |  |
Total liabilities and equity assumed | (386,127) |  |  |  |  |
Landrum Company |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Cash and due from banks |  | $ 27,591 |  |  |  | $ 27,591
Due from banks - time |  | 100 |  |  |  | 100
Investment securities |  | 114,668 |  |  |  | 114,793
Loans acquired |  | 789,504 |  |  |  | 785,551
Allowance for credit losses on loans |  | (2,359) |  |  |  | (5,980)
Premises and equipment |  | 5,441 |  |  |  | 9,540
Bank owned life insurance |  | 21,287 |  |  |  | 21,287
Other assets |  | 8,431 |  |  |  | 13,036
Total assets acquired |  | 968,822 |  |  |  | 966,006
Liabilities Assumed |  |  |  |  |  |
Noninterest bearing transaction accounts |  | 110,393 |  |  |  | 110,393
Interest bearing transaction accounts and savings deposits |  | 425,777 |  |  |  | 425,777
Time deposits |  | 266,501 |  |  |  | 266,835
Total deposits |  | 802,671 |  |  |  | 803,005
Other borrowings |  | 47,023 |  |  |  | 47,023
Accrued interest and other liabilities |  | 5,337 |  |  |  | 8,459
Total liabilities assumed |  | 855,031 |  |  |  | 858,487
Equity |  | 0 |  |  |  | 107,519
Total liabilities and equity assumed |  | 855,031 |  |  |  | 966,006
Net assets acquired |  | 113,791 |  |  |  |
Purchase price |  | 145,195 |  |  |  |
Goodwill |  | 31,404 |  |  |  |
Landrum Company | Fair Value Adjustments |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Cash and due from banks |  | 0 |  |  |  |
Due from banks - time |  | 0 |  |  |  |
Investment securities |  | (125) |  |  |  |
Loans acquired |  | 3,953 |  |  |  |
Allowance for credit losses on loans |  | 3,621 |  |  |  |
Premises and equipment |  | (4,099) |  |  |  |
Bank owned life insurance |  | 0 |  |  |  |
Other assets |  | (4,605) |  |  |  |
Total assets acquired |  | 2,816 |  |  |  |
Liabilities Assumed |  |  |  |  |  |
Noninterest bearing transaction accounts |  | 0 |  |  |  |
Interest bearing transaction accounts and savings deposits |  | 0 |  |  |  |
Time deposits |  | (334) |  |  |  |
Total deposits |  | (334) |  |  |  |
Other borrowings |  | 0 |  |  |  |
Accrued interest and other liabilities |  | (3,122) |  |  |  |
Total liabilities assumed |  | (3,456) |  |  |  |
Equity |  | (107,519) |  |  |  |
Total liabilities and equity assumed |  | (110,975) |  |  |  |
Triumph Bancshares Inc |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Cash and due from banks |  | 7,484 |  |  |  | 7,484
Due from banks - time |  | 495 |  |  |  | 495
Investment securities |  | 129,455 |  |  |  | 130,571
Loans acquired |  | 698,786 |  |  |  | 702,460
Allowance for credit losses on loans |  | (11,092) |  |  |  | (12,617)
Premises and equipment |  | 3,258 |  |  |  | 2,774
Goodwill |  | 0 |  |  |  | 1,550
Other assets |  | 13,703 |  |  |  | 12,806
Total assets acquired |  | 847,225 |  |  |  | 845,523
Liabilities Assumed |  |  |  |  |  |
Noninterest bearing transaction accounts |  | 115,729 |  |  |  | 115,729
Interest bearing transaction accounts and savings deposits |  | 383,434 |  |  |  | 383,434
Time deposits |  | 220,571 |  |  |  | 219,477
Total deposits |  | 719,734 |  |  |  | 718,640
Securities sold under agreement to repurchase |  | 2,854 |  |  |  | 2,854
Other borrowings |  | 30,700 |  |  |  | 30,700
Accrued interest and other liabilities |  | 3,337 |  |  |  | 2,882
Total liabilities assumed |  | 756,625 |  |  |  | 755,076
Equity |  | 0 |  |  |  | 90,446
Total liabilities and equity assumed |  | 756,625 |  |  |  | 845,522
Net assets acquired |  | 90,600 |  |  |  |
Purchase price |  | 130,544 |  |  |  |
Goodwill |  | 39,944 |  |  |  |
Triumph Bancshares Inc | Fair Value Adjustments |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Cash and due from banks |  | 0 |  |  |  |
Due from banks - time |  | 0 |  |  |  |
Investment securities |  | (1,116) |  |  |  |
Loans acquired |  | (3,674) |  |  |  |
Allowance for credit losses on loans |  | 1,525 |  |  |  |
Premises and equipment |  | 484 |  |  |  |
Goodwill |  | (1,550) |  |  |  |
Other assets |  | 897 |  |  |  |
Total assets acquired |  | 1,702 |  |  |  |
Liabilities Assumed |  |  |  |  |  |
Noninterest bearing transaction accounts |  | 0 |  |  |  |
Interest bearing transaction accounts and savings deposits |  | 0 |  |  |  |
Time deposits |  | 1,094 |  |  |  |
Total deposits |  | 1,094 |  |  |  |
Securities sold under agreement to repurchase |  | 0 |  |  |  |
Other borrowings |  | 0 |  |  |  |
Accrued interest and other liabilities |  | 455 |  |  |  |
Total liabilities assumed |  | 1,549 |  |  |  |
Equity |  | (90,446) |  |  |  |
Total liabilities and equity assumed |  | (88,897) |  |  |  |
Core Deposit Premium | Spirit of Texas Bancshares, Inc. |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Core deposit intangible | 38,631 |  |  |  | $ 6,245 |
Core Deposit Premium | Spirit of Texas Bancshares, Inc. | Fair Value Adjustments |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Core deposit intangible | $ 32,386 |  |  |  |  |
Core Deposit Premium | Landrum Company |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Core deposit intangible |  | 4,159 |  |  |  | 88
Core Deposit Premium | Landrum Company | Fair Value Adjustments |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Core deposit intangible |  | 4,071 |  |  |  |
Core Deposit Premium | Triumph Bancshares Inc |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Core deposit intangible |  | 5,136 |  |  |  | $ 0
Core Deposit Premium | Triumph Bancshares Inc | Fair Value Adjustments |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Core deposit intangible |  | $ 5,136 |  |  |  |

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