Parent Company Financial Information - Condensed Income Statement (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2018	Dec. 31, 2017
Condensed Income Statements, Captions [Line Items]
Other expenses									$ (11,539)	$ (10,795)
Income before income tax benefit and equity in undistributed net income of subsidiaries	$ 365	$ 631	$ 433	$ 283	$ 565	$ 512	$ 401	$ 346	1,713	1,824
Income tax benefit									(130)	(913)
NET INCOME	$ 307	$ 542	$ 478	$ 255	$ (152)	$ 411	$ 338	$ 316	1,583	911
Glen Burnie Bancorp
Condensed Income Statements, Captions [Line Items]
Dividends and distributions from subsidiaries									977	1,089
Other expenses									(140)	(115)
Income before income tax benefit and equity in undistributed net income of subsidiaries									837	974
Income tax benefit									38	45
Change in undistributed equity of subsidiaries									708	(108)
NET INCOME									$ 1,583	$ 911