Other Investments Other Investments	12 Months Ended
Dec. 31, 2016
Investments, All Other Investments [Abstract]
Investments and Other Noncurrent Assets [Text Block]	NOTE 6. OTHER INVESTMENTS Summit is a member bank of the Federal Home Loan Bank ("FHLB") system. Members are required to own a certain amount of stock based on the level of borrowings from FHLB and other factors. FHLB stock is carried at cost and periodically evaluated for impairment based on ultimate recovery of par value. Dividends are reported as income as earned. This stock totaled $9.59 million and $8.12 million at December 31, 2016 and 2015. Summit has invested in a limited partnership which owns interests in a diversified portfolio of qualified affordable housing projects. As a result of this investment, Summit is allocated its proportional share of the limited partnership's operating losses and Federal Low Income Housing and Rehabilitation Tax Credits. We use the proportional amortization method to account for this investment, whereby the cost of the investment is amortized in proportion to the amount of tax credits and other tax benefits received and recognize the net investment performance in the income statement as a component of the provision for current income taxes. As of December 31, 2016 and 2015, our investment in the limited partnership totaled $3.33 million and $831,000, respectively. For the year ended December 31, 2016, Summit recognized $55,000 in tax credits and other tax benefits related to this investment. No credits were recognized in 2015 or 2014.

NOTE 6. OTHER INVESTMENTS

Summit is a member bank of the Federal Home Loan Bank ("FHLB") system. Members are required to own a certain amount of stock based on the level of borrowings from FHLB and other factors. FHLB stock is carried at cost and periodically evaluated for impairment based on ultimate recovery of par value. Dividends are reported as income as earned. This stock totaled $9.59 million and $8.12 million at December 31, 2016 and 2015.

Summit has invested in a limited partnership which owns interests in a diversified portfolio of qualified affordable housing projects. As a result of this investment, Summit is allocated its proportional share of the limited partnership's operating losses and Federal Low Income Housing and Rehabilitation Tax Credits. We use the proportional amortization method to account for this investment, whereby the cost of the investment is amortized in proportion to the amount of tax credits and other tax benefits received and recognize the net investment performance in the income statement as a component of the provision for current income taxes. As of December 31, 2016 and 2015, our investment in the limited partnership totaled $3.33 million and $831,000, respectively. For the year ended December 31, 2016, Summit recognized $55,000 in tax credits and other tax benefits related to this investment. No credits were recognized in 2015 or 2014.