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ALLOWANCE FOR LOAN LOSSES: ALLOWANCE FOR LOAN LOSSES: (Details 4) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Financing Receivable, Impaired, Troubled Debt Restructuring [Roll Forward] |  |  |
January 1, | $ 4,194 | $ 4,806 | $ 7,034
Added | 996 | 570 | 1,279
Charged Off | (164) | (105) | (153)
Payments | (820) | (1,077) | (3,354)
December 31, | 4,206 | 4,194 | 4,806
Commercial |  |  |
Financing Receivable, Impaired, Troubled Debt Restructuring [Roll Forward] |  |  |
January 1, | 11 | 145 | 2,709
Added | 0 | 0 | 0
Charged Off | 0 | 0 | 0
Payments | (11) | (134) | (2,564)
December 31, | 0 | 11 | 145
Residential |  |  |
Financing Receivable, Impaired, Troubled Debt Restructuring [Roll Forward] |  |  |
January 1, | 3,485 | 4,043 | 3,611
Added | 692 | 195 | 984
Charged Off | (6) | (24) | (16)
Payments | (582) | (729) | (536)
December 31, | 3,589 | 3,485 | 4,043
Consumer |  |  |
Financing Receivable, Impaired, Troubled Debt Restructuring [Roll Forward] |  |  |
January 1, | 698 | 618 | 714
Added | 304 | 375 | 295
Charged Off | (158) | (81) | (137)
Payments | (227) | (214) | (254)
December 31, | $ 617 | $ 698 | $ 618

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