Parent Company Financial Information - Condensed Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
ASSETS
Cash	$ 12,605	$ 10,622	$ 12,371
Other assets	583	814
Total Assets	389,450	388,441
Liabilities and Stockholders' Equity
Total Liabilities	355,408	354,627
STOCKHOLDERS' EQUITY
Common stock	2,801	2,787
Additional paid-in capital	10,267	10,130
Retained earnings	21,605	21,707
Accumulated other comprehensive income (loss), net of benefits	(631)	(810)
Total Stockholders' Equity	34,042	33,814	34,176
Total Liabilities and Stockholders' Equity	389,450	388,441
Glen Burnie Bancorp
ASSETS
Cash	233	169	$ 184
Investment	33,785	33,527
Due from subsidiaries	1	3
Other assets	4	11
Total Assets	34,044	33,814
Liabilities and Stockholders' Equity
Other liabilities	1
Total Liabilities	1
STOCKHOLDERS' EQUITY
Common stock	2,801	2,787
Additional paid-in capital	10,267	10,130
Retained earnings	21,606	21,707
Accumulated other comprehensive income (loss), net of benefits	(631)	(810)
Total Stockholders' Equity	34,043	33,814
Total Liabilities and Stockholders' Equity	34,044	33,814
Glen Burnie Bancorp | Gbb Properties Inc
ASSETS
Investment	$ 21	$ 104