Condensed Balance Sheet (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Assets
Other assets	$ 668,392us-gaap_OtherAssets	$ 694,142us-gaap_OtherAssets	$ 1,317,408us-gaap_OtherAssets
Total assets	394,629,508us-gaap_Assets	377,193,574us-gaap_Assets	387,438,269us-gaap_Assets
Liabilities and Stockholders' Equity
Dividends payable	276,096	274,737
Total liabilities	360,798,981us-gaap_Liabilities	345,610,413us-gaap_Liabilities	353,850,604us-gaap_Liabilities
Stockholders' equity:
Common stock	2,760,964us-gaap_CommonStockValue	2,747,370us-gaap_CommonStockValue	2,736,978us-gaap_CommonStockValue
Surplus	9,854,119	9,713,335	9,604,906
Retained earnings	21,112,714	20,300,531	18,783,164
Accumulated other comprehensive income (loss), net of benefits	102,730	(1,178,075)	2,462,617
Total stockholders' equity	33,830,527us-gaap_StockholdersEquity	31,583,161us-gaap_StockholdersEquity	33,587,665us-gaap_StockholdersEquity	31,210,830us-gaap_StockholdersEquity
Total liabilities and stockholders' equity	394,629,508	377,193,574	387,438,269
Parent Company
Assets
Cash	283,796	296,245	75,902
Due from subsidiaries	2,095	2,067	1,362
Other assets	8,533	11,957	4,292
Total assets	34,106,623	31,857,898	33,587,665
Liabilities and Stockholders' Equity
Dividends payable	276,096	274,737
Total liabilities	276,096	274,737
Stockholders' equity:
Common stock	2,760,964	2,747,370	2,736,978
Surplus	9,854,119	9,713,335	9,604,906
Retained earnings	21,112,714	20,300,531	18,783,164
Accumulated other comprehensive income (loss), net of benefits	102,730	(1,178,075)	2,462,617
Total stockholders' equity	33,830,527	31,583,161	33,587,665
Total liabilities and stockholders' equity	34,106,623	31,857,898	33,587,665
Parent Company \| Bank Of Glen Burnie
Assets
Investment	33,557,329	31,292,459	33,250,639
Parent Company \| GBB Properties, Inc.
Assets
Investment	$ 254,870	$ 255,170	$ 255,470

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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