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NOTE 7: ACQUIRED LOANS: Schedule of Accretable Yield Changes for Acquired Loans (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2019 | Mar. 31, 2018
TeamBank |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion |  | $ (434) | $ (227)
Change in expected accretable yield | [1] | 477 | (17)
TeamBank | Beginning of Period |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) |  | 1,356 | 2,071
TeamBank | End of Period |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) |  | 1,399 | 1,827
Vantus Bank |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion |  | (218) | (278)
Change in expected accretable yield | [1] | 88 | 183
Vantus Bank | Beginning of Period |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) |  | 1,432 | 1,850
Vantus Bank | End of Period |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) |  | 1,302 | 1,755
Sun Security Bank |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion |  | (441) | (430)
Change in expected accretable yield | [1] | 643 | (402)
Sun Security Bank | Beginning of Period |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) |  | 2,242 | 2,901
Sun Security Bank | End of Period |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) |  | 2,444 | 2,069
InterBank |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion |  | (2,028) | (1,823)
Change in expected accretable yield | [1] | 4,982 | 3,653
InterBank | Beginning of Period |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) |  | 4,994 | 5,074
InterBank | End of Period |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) |  | 7,948 | 6,904
Valley Bank |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Accretion |  | (854) | (1,130)
Change in expected accretable yield | [1] | 2,120 | 1,851
Valley Bank | Beginning of Period |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) |  | 3,063 | 2,695
Valley Bank | End of Period |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield, Period Increase (Decrease) |  | $ 4,329 | $ 3,416
[1] | Represents increases (decreases) in estimated cash flows expected to be received from the acquired loan pools, partially due to lower estimated credit losses. The amounts also include changes in expected accretion of the loan pools for TeamBank, Vantus Bank, Sun Security Bank, InterBank and Valley Bank for the three months ended March 31, 2019, totaling $477,000, $88,000, $583,000, $4.1 million and $1.3 million, respectively, and for the three months ended March 31, 2018, totaling $(17,000), $183,000, $(402,000), $2.4 million and $1.3 million, respectively.

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- Definition Amount of accretion recognized for the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities, with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118938799&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 + Details
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- Definition Amount of increase (decrease) of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=118938799&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=118939070&loc=d3e15032-111544 + Details
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