Significant Accounting Policies, Premises and Equipment (Details)	3 Months Ended
	Mar. 31, 2021
Buildings [Member] | Minimum [Member]
Premises and Equipment [Abstract]
Estimated useful lives	30 years
Buildings [Member] | Maximum [Member]
Premises and Equipment [Abstract]
Estimated useful lives	40 years
Furniture and Equipment [Member] | Minimum [Member]
Premises and Equipment [Abstract]
Estimated useful lives	3 years
Furniture and Equipment [Member] | Maximum [Member]
Premises and Equipment [Abstract]
Estimated useful lives	7 years
Leasehold Improvements [Member] | Minimum [Member]
Premises and Equipment [Abstract]
Estimated useful lives	5 years
Leasehold Improvements [Member] | Maximum [Member]
Premises and Equipment [Abstract]
Estimated useful lives	10 years