Goodwill and Intangible Assets - Intangible Assets Mortgage Servicing Rights (Details) - USD ($)	9 Months Ended		12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Valuation reserve	$ (614,000)
Mortgage Servicing Rights
Finite Lived Intangible Assets [Line Items]
Beginning Balance	1,444,000	$ 2,101,000	$ 2,101,000
Valuation reserve	(328,000)	(384,000)	(380,000)
Mortgage servicing rights amortized	(415,000)	(293,000)	(411,000)
I/O Strip	(40,000)	145,000	134,000
Ending Balance	$ 661,000	$ 1,569,000	$ 1,444,000