Subsequent Event (Details) - USD ($) $ / shares in Units, $ in Thousands	Oct. 31, 2021	Sep. 30, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Assets		$ 2,260,774	$ 1,933,315
Subsequent Event | Severn Bancorp, Inc.
Subsequent Event [Line Items]
Number of Shares to be Issued for each share	0.6207
Cash Payment for Each Share	$ 1.59
Purchase price per share	$ 18.48
Total assets	$ 1,300,000
Deposits, acquired	950,000
Loans, acquired	$ 589,600