Subsequent Event (Details)		12 Months Ended
	Mar. 03, 2021 USD ($) shares	Dec. 31, 2020 USD ($) Office	Dec. 31, 2019 USD ($)
Subsequent Event [Line Items]
Assets		$ 1,933,315,000	$ 1,559,235,000
Severn Bancorp, Inc.
Subsequent Event [Line Items]
Number of Community Banking Offices | Office		7
Severn Bancorp, Inc. | Minimum
Subsequent Event [Line Items]
Assets		$ 950,000,000
Subsequent Event
Subsequent Event [Line Items]
Percentage of ownership Interests	59.60%
Subsequent Event | Severn Bancorp, Inc.
Subsequent Event [Line Items]
Percentage of ownership Interests	40.40%
Subsequent Event | Severn Bancorp, Inc.
Subsequent Event [Line Items]
Number of Shares to be Issued for each share | shares	0.6207
Cash Payment for Each Share	$ 1.59