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12) Mortgage Servicing Rights: Schedule of Mortgage Servicing Rights (Details) - USD ($) | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Details |  |
Balance before valuation allowance at beginning of year | $ 21,376,937 | $ 18,872,362
MSRs proceeds from loan sales | 1,364,733 | 6,085,352
Amortization | (1,623,733) | (3,580,777)
Balance before valuation allowance at year end | 21,117,937 | 21,376,937
Mortgage servicing rights, net | 21,117,937 | 21,376,937
Estimated fair value of MSRs at end of period | $ 31,037,960 | $ 27,427,174

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