Investment Securities (Details Textual) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Investments	Dec. 31, 2019 USD ($) Investments	Dec. 31, 2018 USD ($)
Investments, Debt and Equity Securities [Abstract]
Sale of investment securities	$ 2,000
Gain on sale of investment securities	$ 3	$ 727	$ 7
Number of investments, Less than 12 months | Investments	26	28
Fair market value, less than 12 months	$ 28,700
Number of investments, 12 months or longer | Investments	10	22
Fair market value,12 months or longer	$ 9,500