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FDIC-Acquired Loans and Loss Sharing Agreements (Tables) | 12 Months Ended
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Dec. 31, 2020
FDIC-Acquired Loans and Loss Sharing Agreements |
Schedule of FDIC Indemnification Asset Policy | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Sun Security | ​ | ​ | ​ | ​ | ​ | ​
​ |  | TeamBank |  | Vantus Bank |  | Bank |  | InterBank |  | Valley Bank
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2020 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Gross loans receivable | ​ | $ | 5,393 | ​ | $ | 8,052 | ​ | $ | 13,395 | ​ | $ | 44,215 | ​ | $ | 31,515
Balance of accretable discount due to change in expected losses | ​ |  | (97) | ​ |  | (35) | ​ |  | (180) | ​ |  | (1,079) | ​ |  | (612)
Net carrying value of loans receivable | ​ |  | (5,266) | ​ |  | (8,004) | ​ |  | (13,111) | ​ |  | (42,057) | ​ |  | (30,204)
Expected loss remaining | ​ | $ | 30 | ​ | $ | 13 | ​ | $ | 104 | ​ | $ | 1,079 | ​ | $ | 699
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2019 | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Gross loans receivable | ​ | $ | 7,304 | ​ | $ | 9,899 | ​ | $ | 17,906 | ​ | $ | 60,430 | ​ | $ | 41,032
Balance of accretable discount due to change in expected losses | ​ |  | (159) | ​ |  | (89) | ​ |  | (374) | ​ |  | (5,143) | ​ |  | (1,803)
Net carrying value of loans receivable | ​ |  | (7,118) | ​ |  | (9,797) | ​ |  | (17,392) | ​ |  | (54,442) | ​ |  | (38,452)
Expected loss remaining | ​ | $ | 27 | ​ | $ | 13 | ​ | $ | 140 | ​ | $ | 845 | ​ | $ | 777
Schedule of Impact of Adjustments of Acquired Loans on Financial Results | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2020 |  | 2019 |  | 2018
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Increase in accretable yield due to increased cash flow expectations | ​ | $ | — | ​ | $ | 12,323 | ​ | $ | 5,202
Schedule of Impact of Acquired Loans on Financial Results | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31,
​ |  | 2020 |  | 2019 |  | 2018
​ | ​ | (In Thousands)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Interest income and net impact to pre-tax income | ​ | $ | 5,574 | ​ | $ | 7,431 | ​ | $ | 5,134
Schedule Of Accretable Yield Changes For Acquired Loans | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Sun | ​ | ​ | ​ | ​ | ​ | ​
​ |  | TeamBank |  | Vantus Bank |  | Security Bank |  | InterBank |  | Valley Bank
​ | ​ | (In Thousands)
Balance, January 1, 2018 | ​ | ​ | 2,071 | ​ | ​ | 1,850 | ​ | ​ | 2,901 | ​ | ​ | 5,074 | ​ | ​ | 2,695
Accretion | ​ |  | (1,042) | ​ |  | (1,196) | ​ |  | (1,667) | ​ |  | (8,349) | ​ |  | (3,892)
Reclassification from nonaccretable difference(1) | ​ |  | 327 | ​ |  | 778 | ​ |  | 1,008 | ​ |  | 8,269 | ​ |  | 4,260
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, December 31, 2018 | ​ |  | 1,356 | ​ |  | 1,432 | ​ |  | 2,242 | ​ |  | 4,994 | ​ |  | 3,063
Accretion | ​ |  | (955) | ​ |  | (1,006) | ​ |  | (1,562) | ​ |  | (8,798) | ​ |  | (4,302)
Reclassification from nonaccretable difference(1) | ​ |  | 756 | ​ |  | 697 | ​ |  | 1,268 | ​ |  | 12,081 | ​ |  | 5,817
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, December 31, 2019 | ​ | $ | 1,157 | ​ | $ | 1,123 | ​ | $ | 1,948 | ​ | $ | 8,277 | ​ | $ | 4,578
Accretion | ​ |  | (479) | ​ |  | (831) | ​ |  | (1,046) | ​ |  | (6,791) | ​ |  | (3,005)
Reclassification from nonaccretable difference(1) | ​ |  | 198 | ​ |  | 451 | ​ |  | 493 | ​ |  | 2,219 | ​ |  | 2,764
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance, December 31, 2020 | ​ | $ | 876 | ​ | $ | 743 | ​ | $ | 1,395 | ​ | $ | 3,705 | ​ | $ | 4,337
(1) | Represents increases in estimated cash flows expected to be received from the acquired loan pools, primarily due to lower estimated credit losses. The numbers also include changes in expected accretion of the loan pools for TeamBank, Vantus Bank, Sun Security Bank, InterBank and Valley Bank for the year ended December 31, 2020, totaling $198,000, $451,000, $493,000, $2.2 million and $2.8 million, respectively; TeamBank, Vantus Bank, Sun Security Bank, InterBank and Valley Bank for the year ended December 31, 2019, totaling $667,000, $480,000, $810,000, $3.9 million and $2.5 million, respectively; for TeamBank, Vantus Bank, Sun Security Bank, InterBank and Valley Bank for the year ended December 31, 2018, totaling $312,000, $778,000, $756,000, $4.1 million and $3.5 million, respectively.

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