Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000750574 (http://www.sec.gov/CIK)

Long-term debt:	Period [Axis]
	2016-01-01 - 2016-12-31
Long-term debt:
Schedule of Long-term Debt Instruments [Table Text Block]	2016 2015 Weighted Weighted (Dollars in thousands) Amount Avg. Rate Amount Avg. Rate Subordinated debentures, due 2033 $ 3,217 3.88 % $ 7,217 3.63 % Total long-term debt $ 3,217 3.88 % $ 7,217 3.63 %
Schedule of Maturities of Long-term Debt [Table Text Block]	(Dollars in thousands) 2017 2018 2019 2020 2021 Thereafter Total Subordinated debentures — — — — — 3,217 3,217 Total long-term debt $ — — — — — 3,217 3,217