Parent Company Financial Information - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
ASSETS
Other assets	$ 362	$ 308
Total Assets	419,486	384,942
Liabilities and Stockholders' Equity
Total Liabilities	382,393	349,262
STOCKHOLDERS' EQUITY
Common stock	2,842	2,827
Surplus	10,640	10,525
Retained earnings	23,071	22,537
Accumulated other comprehensive income (loss), net of benefits	540	(209)
Total Stockholders' Equity	37,093	35,680	$ 34,051
Total Liabilities and Stockholders' Equity	419,486	384,942
Glen Burnie Bancorp
ASSETS
Cash and cash equivalents	111	43	$ 135
Investment	36,982	35,637
Total Assets	37,093	35,680
STOCKHOLDERS' EQUITY
Common stock	2,842	2,827
Surplus	10,640	10,525
Retained earnings	23,071	22,537
Accumulated other comprehensive income (loss), net of benefits	540	(209)
Total Stockholders' Equity	37,093	35,680
Total Liabilities and Stockholders' Equity	$ 37,093	$ 35,680