Investment Securities (Details 1) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Dec. 31, 2019
Amortized cost
Amortized Cost	$ 206,231	$ 202,929
Estimated fair value
Total	206,832	214,257
Investment securities	206,832	214,257
Weighted average yield
Debt Securities, Available-for-sale, Amortized Cost	206,231	202,929
Less Than 12 Months, Fair Value	91,762
Less Than 12 Months, Unrealized Loss	(248)
12 Months or Longer, Fair Value	10,953
12 Months or Longer, Unrealized Loss	(3,760)
Total, Fair Value	102,715
Total, Unrealized Loss	$ (4,008)
Available-for-sale Securities, Other Disclosure Items
Federal tax rate (percent)	21.00%
Customer repurchase agreements
Available-for-sale Securities, Other Disclosure Items
Available-for-sale debt securities pledged to secure certain customer repurchase agreements and deposits	$ 3,000	3,500
Residential mortgage-backed securities
Amortized cost
Less Than One Year	0	0
After One Through Five Years	772	1,005
After Five Through Ten Years	0	0
After Ten Years	3,536	3,986
Amortized Cost	4,308	4,991
Estimated fair value
Less Than One Year	0	0
After One Through Five Years	851	1,088
After Five Through Ten Years	0	0
After Ten Years	3,611	4,178
Investment securities	$ 4,462	$ 5,266
Weighted average yield
Less Than One Year	0.00%	0.00%
After One Through Five Years	5.54%	5.54%
After Five Through Ten Years	0.00%	0.00%
After Ten Years	3.73%	4.31%
Total	4.05%	4.55%
Debt Securities, Available-for-sale, Amortized Cost	$ 4,308	$ 4,991
Tax-exempt asset-backed securities
Amortized cost
Less Than One Year	0	0
After One Through Five Years	0	0
After Five Through Ten Years	0	0
After Ten Years	187,210	183,225
Amortized Cost	187,210	183,225
Estimated fair value
Less Than One Year	0	0
After One Through Five Years	0	0
After Five Through Ten Years	0	0
After Ten Years	191,417	197,027
Investment securities	$ 191,417	$ 197,027
Weighted average yield
Less Than One Year	0.00%	0.00%
After One Through Five Years	0.00%	0.00%
After Five Through Ten Years	0.00%	0.00%
After Ten Years	3.88%	4.20%
Total	3.88%	4.20%
Debt Securities, Available-for-sale, Amortized Cost	$ 187,210	$ 183,225
Less Than 12 Months, Fair Value	91,762
Less Than 12 Months, Unrealized Loss	(248)
12 Months or Longer, Fair Value	0
12 Months or Longer, Unrealized Loss	0
Total, Fair Value	91,762
Total, Unrealized Loss	(248)
Credit risk transfer securities
Amortized cost
Less Than One Year	0	0
After One Through Five Years	0	0
After Five Through Ten Years	0	0
After Ten Years	14,713	14,713
Amortized Cost	14,713	14,713
Estimated fair value
Less Than One Year	0	0
After One Through Five Years	0	0
After Five Through Ten Years	0	0
After Ten Years	10,953	11,964
Investment securities	$ 10,953	$ 11,964
Weighted average yield
Less Than One Year	0.00%	0.00%
After One Through Five Years	0.00%	0.00%
After Five Through Ten Years	0.00%	0.00%
After Ten Years	0.18%	1.71%
Total	0.18%	1.71%
Debt Securities, Available-for-sale, Amortized Cost	$ 14,713	$ 14,713
Less Than 12 Months, Fair Value	0	11,964
Less Than 12 Months, Unrealized Loss	0	(2,749)
12 Months or Longer, Fair Value	10,953	0
12 Months or Longer, Unrealized Loss	(3,760)	0
Total, Fair Value	10,953	11,964
Total, Unrealized Loss	(3,760)	(2,749)
Deposits
Available-for-sale Securities, Other Disclosure Items
Available-for-sale debt securities pledged to secure certain customer repurchase agreements and deposits	$ 1,400	$ 1,200