Fair Value Measurements - Summary of fair value measurements on recurring and non-recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Recurring:
Investment securities available for sale, at fair value	$ 89,349	$ 94,606
Non-recurring:
OREO	114	114
Assets, fair value disclosure	93,074	99,237
Level 2
Non-recurring:
Assets, fair value disclosure	89,511	94,720
Level 3
Non-recurring:
Assets, fair value disclosure	3,562	4,517
U.S. Treasury securities
Recurring:
Investment securities available for sale, at fair value	1,493	1,506
Municipal securities
Recurring:
Investment securities available for sale, at fair value	35,633	33,845
Recurring \| U.S. Treasury securities
Recurring:
Investment securities available for sale, at fair value	1,493	1,506
Recurring \| U.S. Treasury securities \| Level 2
Recurring:
Investment securities available for sale, at fair value	1,493	1,506
Recurring \| Municipal securities
Recurring:
Investment securities available for sale, at fair value	35,633	33,845
Recurring \| Municipal securities \| Level 2
Recurring:
Investment securities available for sale, at fair value	35,633	33,845
Recurring \| Agency mortgage-backed securities
Recurring:
Investment securities available for sale, at fair value	52,223	59,255
Recurring \| Agency mortgage-backed securities \| Level 2
Recurring:
Investment securities available for sale, at fair value	52,223	59,255
Recurring \| Interest rate swap
Recurring:
Investment securities available for sale, at fair value	49
Recurring \| Interest rate swap \| Level 2
Recurring:
Investment securities available for sale, at fair value	49
Nonrecurring
Non-recurring:
Maryland Financial Bank stock	30	30
Impaired loans	3,532	4,487
OREO	114	114
Nonrecurring \| Level 2
Non-recurring:
OREO	114	114
Nonrecurring \| Level 3
Non-recurring:
Maryland Financial Bank stock	30	30
Impaired loans	$ 3,532	$ 4,487

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- Definition

Amount of fair value of loans and leases receivable Impaired as on the balance sheet date.

+ References

No definition available.

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Maryland Financial Bank (MFB) stock represents an equity interest in a MFB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

+ References

No definition available.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
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- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section S99
-Paragraph 6
-Subparagraph (SX 210.5-04(c)(Schedule III))
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-Publisher FASB
-Name Accounting Standards Codification
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