Short-term Borrowings (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Aug. 21, 2019	Dec. 31, 2018
Line of Credit Facility [Line Items]
Amount of outstanding borrowings	$ 0
Customer repurchase agreements	$ 40,475,000		$ 35,243,000
Customer repurchase agreements, weighted average rate	1.40%		1.67%
Line of Credit
Line of Credit Facility [Line Items]
Interest paid	$ 4,000,000
Line of Credit | Correspondent Bank
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity		$ 15,000,000
Line of Credit | Another Correspondent Bank
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity		10,000,000
Line of Credit | Regional Commercial Bank
Line of Credit Facility [Line Items]
Line of credit maximum borrowing capacity		$ 3,000,000
Stated percentage		0.25%