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Parent Company Financial Information - Condensed Income Statement (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Other expenses |  |  |  |  |  |  |  |  | $ (11,946) | $ (11,539)
Income before income tax benefit and equity in undistributed net income of subsidiaries | $ 676 | $ 818 | $ 386 | $ 171 | $ 365 | $ 528 | $ 433 | $ 283 | 2,051 | 1,713
Income tax benefit |  |  |  |  |  |  |  |  | (452) | (130)
NET INCOME | $ 539 | $ 606 | $ 319 | $ 135 | $ 307 | $ 439 | $ 478 | $ 255 | 1,599 | 1,583
Glen Burnie Bancorp |  |  |  |  |  |  |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |  |  |  |  |  |  |
Dividends and distributions from subsidiaries |  |  |  |  |  |  |  |  | 1,070 | 977
Other expenses |  |  |  |  |  |  |  |  | (206) | (140)
Income before income tax benefit and equity in undistributed net income of subsidiaries |  |  |  |  |  |  |  |  | 864 | 837
Income tax benefit |  |  |  |  |  |  |  |  | 32 | 38
Change in undistributed equity of subsidiaries |  |  |  |  |  |  |  |  | 703 | 708
NET INCOME |  |  |  |  |  |  |  |  | $ 1,599 | $ 1,583

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