Condensed Financial Information (Parent Company Only) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity in net assets of subsidiaries [Abstract]
Loans, net of allowance for loan losses of $- and $19, respectively	$ 633,882	$ 602,813
Foreclosed real estate	1,947	8,972	11,441
Total assets	776,328	799,603
Subordinated debentures	24,119	24,119
Total Liabilities	692,518	716,834
Stockholders' equity	83,810	82,769	108,996
Total liabilities and stockholders' equity	776,328	799,603
Loans, allowance for loan losses	9,435	11,739
Statements of Operations [Abstract]
Interest income	31,816	33,792
Net interest income	23,182	24,608
Provision for loan losses	831	16,520
Income (loss) before income tax provision	2,940	(16,455)
Income tax expense	(31)	(8,710)
Net income (loss)	2,909	(25,165)
Cash Flows from Operating Activities [Abstract]
Net income (loss)	2,909	(25,165)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Provision for loan losses	831	16,520
Stock-based compensation expense	201	108
Net cash provided by operating activities	1,340	13,425
Cash Flows from Investing Activities [Abstract]
Net decrease in loans	(31,752)	(11,330)
Net cash (used in) provided by investing activities	(38,949)	19,704
Cash Flows from Financing Activities [Abstract]
Proceeds from sale of foreclosed real estate	8,174	8,586
Proceeds from exercise of options	3	0
Net cash used in financing activities	(27,432)	(28,145)
(Decrease) increase in cash and cash equivalents	(65,041)	4,984
Cash and cash equivalents at beginning of year	98,376	93,392
Cash and cash equivalents at end of year	33,335	98,376
Supplemental disclosure of cash flows information:
Transfer of net loans to foreclosed real estate	847	10,169
Severn Bancorp, Inc [Member]
Statements of Financial Condition [Abstract]
Cash	1,316	969
Equity in net assets of subsidiaries [Abstract]
Bank	107,316	103,196
Non-Bank	3,758	3,675
Loans, net of allowance for loan losses of $- and $19, respectively	0	331
Foreclosed real estate	0	250
Other assets	920	1,479
Total assets	113,310	109,900
Subordinated debentures	24,119	24,119
Other liabilities	5,381	3,012
Total Liabilities	29,500	27,131
Stockholders' equity	83,810	82,769
Total liabilities and stockholders' equity	113,310	109,900
Loans, allowance for loan losses	0	19
Statements of Operations [Abstract]
Interest income	34	26
Interest expense on subordinated debentures	1,086	857
Net interest income	(1,052)	(831)
General and administrative expenses	242	184
Provision for loan losses	(19)	0
Income (loss) before income tax provision	(1,275)	(1,015)
Income tax expense	(20)	(3)
Equity in undistributed net income (loss) of subsidiaries	4,204	(24,147)
Net income (loss)	2,909	(25,165)
Cash Flows from Operating Activities [Abstract]
Net income (loss)	2,909	(25,165)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Equity in undistributed (earnings) loss of subsidiaries	(4,204)	24,147
Provision for loan losses	(19)	0
Decrease (increase) in other assets	559	(65)
Stock-based compensation expense	201	108
Increase in other liabilities	298	579
Net cash provided by operating activities	(256)	(396)
Cash Flows from Investing Activities [Abstract]
Net decrease in loans	350	0
Net cash (used in) provided by investing activities	350	0
Cash Flows from Financing Activities [Abstract]
Proceeds from sale of foreclosed real estate	250	0
Proceeds from exercise of options	3	0
Net cash used in financing activities	253	0
(Decrease) increase in cash and cash equivalents	347	(396)
Cash and cash equivalents at beginning of year	969	1,365
Cash and cash equivalents at end of year	1,316	969
Supplemental disclosure of cash flows information:
Transfer of net loans to foreclosed real estate	$ 0	$ 250