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Acquisitions - Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands | Oct. 31, 2019 | Apr. 12, 2019 | Sep. 30, 2020 | Dec. 31, 2019 | Oct. 30, 2019 | Apr. 11, 2019
--- | --- | --- | --- | --- | --- | ---
Liabilities Assumed |  |  |  |  |  |
Goodwill |  |  | $ 1,075,305 | $ 1,055,520 |  |
Landrum Company |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Cash and due from banks | $ 215,285 |  |  |  | $ 215,285 |
Due from banks - time | 248 |  |  |  | 248 |
Investment securities | 1,025,983 |  |  |  | 1,021,755 |
Loans acquired | 2,005,486 |  |  |  | 2,049,137 |
Allowance for loan losses |  |  |  |  | (22,736) |
Foreclosed assets | 190 |  |  |  | 373 |
Premises and equipment | 82,659 |  |  |  | 63,878 |
Bank owned life insurance | 19,206 |  |  |  | 19,206 |
Other assets | 20,634 |  |  |  | 33,924 |
Total assets acquired | 3,399,152 |  |  |  | 3,381,889 |
Liabilities Assumed |  |  |  |  |  |
Non-interest bearing transaction accounts | 716,675 |  |  |  | 716,675 |
Interest bearing transaction accounts and savings deposits | 1,465,429 |  |  |  | 1,465,429 |
Time deposits | 867,496 |  |  |  | 867,197 |
Total deposits | 3,049,600 |  |  |  | 3,049,301 |
Other borrowings | 10,055 |  |  |  | 10,055 |
Subordinated debentures | 33,917 |  |  |  | 34,794 |
Accrued interest and other liabilities | 40,926 |  |  |  | 31,057 |
Total liabilities assumed | 3,134,498 |  |  |  | 3,125,207 |
Total equity assumed |  |  |  |  | 256,682 |
Total liabilities and equity assumed | 3,134,498 |  |  |  | 3,381,889 |
Net assets acquired | 264,654 |  |  |  |  |
Purchase price | 415,779 |  |  |  |  |
Goodwill | 151,125 |  |  | 131,300 | 407 |
Landrum Company | Fair Value Adjustments |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Cash and due from banks | 0 |  |  |  |  |
Due from banks - time | 0 |  |  |  |  |
Investment securities | 4,228 |  |  |  |  |
Loans acquired | (43,651) |  |  |  |  |
Allowance for loan losses | 22,736 |  |  |  |  |
Foreclosed assets | (183) |  |  |  |  |
Premises and equipment | 18,781 |  |  |  |  |
Bank owned life insurance | 0 |  |  |  |  |
Other assets | (13,290) |  |  |  |  |
Total assets acquired | 17,263 |  |  |  |  |
Liabilities Assumed |  |  |  |  |  |
Non-interest bearing transaction accounts | 0 |  |  |  |  |
Interest bearing transaction accounts and savings deposits | 0 |  |  |  |  |
Time deposits | 299 |  |  |  |  |
Total deposits | 299 |  |  |  |  |
Other borrowings | 0 |  |  |  |  |
Subordinated debentures | (877) |  |  |  |  |
Accrued interest and other liabilities | 9,869 |  |  |  |  |
Total liabilities assumed | 9,291 |  |  |  |  |
Total equity assumed | (256,682) |  |  |  |  |
Total liabilities and equity assumed | (247,391) |  |  |  |  |
Goodwill | (407) |  |  |  |  |
Reliance Bancshares, Inc. |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Cash and due from banks |  | $ 25,693 |  |  |  | $ 25,693
Due from banks - time |  | 502 |  |  |  | 502
Investment securities |  | 286,110 |  |  |  | 287,983
Loans acquired |  | 1,096,870 |  |  |  | 1,138,527
Allowance for loan losses |  | 0 |  |  |  | (10,808)
Foreclosed assets |  | 5,912 |  |  |  | 11,092
Premises and equipment |  | 29,451 |  |  |  | 32,452
Bank owned life insurance |  | 39,348 |  |  |  | 39,348
Core deposit intangible |  | 18,350 |  |  |  | 0
Other assets |  | 32,076 |  |  |  | 25,165
Total assets acquired |  | 1,534,312 |  |  |  | 1,549,954
Liabilities Assumed |  |  |  |  |  |
Non-interest bearing transaction accounts |  | 108,812 |  |  |  | 108,845
Interest bearing transaction accounts and savings deposits |  | 639,798 |  |  |  | 639,798
Time deposits |  | 476,657 |  |  |  | 478,415
Total deposits |  | 1,225,267 |  |  |  | 1,227,058
Securities sold under agreement to repurchase |  | 14,146 |  |  |  | 14,146
Other borrowings |  | 157,400 |  |  |  | 162,900
Accrued interest and other liabilities |  | 8,453 |  |  |  | 8,185
Total liabilities assumed |  | 1,405,266 |  |  |  | 1,412,289
Total equity assumed |  | 0 |  |  |  | 137,665
Total liabilities and equity assumed |  | 1,405,266 |  |  |  | $ 1,549,954
Net assets acquired |  | 129,046 |  |  |  |
Purchase price |  | 207,539 |  |  |  |
Goodwill |  | 78,493 |  | $ 78,500 |  |
Reliance Bancshares, Inc. | Fair Value Adjustments |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Cash and due from banks |  | 0 |  |  |  |
Due from banks - time |  | 0 |  |  |  |
Investment securities |  | (1,873) |  |  |  |
Loans acquired |  | (41,657) |  |  |  |
Allowance for loan losses |  | 10,808 |  |  |  |
Foreclosed assets |  | (5,180) |  |  |  |
Premises and equipment |  | (3,001) |  |  |  |
Bank owned life insurance |  | 0 |  |  |  |
Core deposit intangible |  | 18,350 |  |  |  |
Other assets |  | 6,911 |  |  |  |
Total assets acquired |  | (15,642) |  |  |  |
Liabilities Assumed |  |  |  |  |  |
Non-interest bearing transaction accounts |  | (33) |  |  |  |
Interest bearing transaction accounts and savings deposits |  | 0 |  |  |  |
Time deposits |  | (1,758) |  |  |  |
Total deposits |  | (1,791) |  |  |  |
Securities sold under agreement to repurchase |  | 0 |  |  |  |
Other borrowings |  | (5,500) |  |  |  |
Accrued interest and other liabilities |  | 268 |  |  |  |
Total liabilities assumed |  | (7,023) |  |  |  |
Total equity assumed |  | (137,665) |  |  |  |
Total liabilities and equity assumed |  | $ (144,688) |  |  |  |
Core deposit intangible | Landrum Company |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Core deposit intangible | 24,345 |  |  |  | 0 |
Core deposit intangible | Landrum Company | Fair Value Adjustments |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Core deposit intangible | 24,345 |  |  |  |  |
Other intangibles | Landrum Company |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Core deposit intangible | 5,116 |  |  |  | $ 412 |
Other intangibles | Landrum Company | Fair Value Adjustments |  |  |  |  |  |
Assets Acquired |  |  |  |  |  |
Core deposit intangible | $ 4,704 |  |  |  |  |

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