Summary Of Quarterly Results (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Summary of the consolidated results of operations on a quarterly basis [Abstract]
Interest income	$ 8,561	$ 8,460	$ 8,181	$ 8,214	$ 7,844	$ 7,798	$ 7,071	$ 7,280	$ 33,416	$ 29,993
Interest expense	1,926	1,902	1,764	1,723	1,686	1,636	1,591	1,571	7,315	6,484
Net Interest Income	6,635	6,558	6,417	6,491	6,158	6,162	5,480	5,709	26,101	23,509
(Credit) provision for loan and lease losses	255	578	197	212	634	(216)	(586)	(580)	1,242	(748)
Net Interest Income after Provision (Credit) for Loan and Lease Losses	6,380	5,980	6,220	6,279	5,524	6,378	6,066	6,289	24,859	24,257
Other income	838	1,189	1,073	1,207	1,202	700	1,283	847	4,307	3,113
Other expenses	4,729	5,001	5,046	5,221	5,427	5,365	5,737	5,375	19,997	20,985
Loss before income taxes and equity in undistributed net income	2,489	2,168	2,247	2,265	1,299	1,713	1,612	1,761
Income tax (benefit) expense	(1,881)	25	60		(5,139)				(1,796)	(5,139)
Net income (loss)	4,370	2,143	2,187	2,265	6,438	1,713	1,612	1,761	10,965	11,524
Less net (loss) income attributable to noncontrolling interest	248	113	153	76	31	179	151	170	590	531
Net income attributable to Royal Bancshares of Pennsylvania, Inc.	4,122	2,030	2,034	2,189	6,407	1,534	1,461	1,591	10,375	10,993
Net income (loss) available to common shareholders	$ 4,003	$ 1,688	$ 1,696	$ 1,855	$ 5,973	$ 1,100	$ 1,032	$ 1,167	$ 9,242	$ 9,272
Net income (loss) per common share [Abstract]
Basic and diluted (in dollars per share)	$ 0.13	$ 0.06	$ 0.06	$ 0.06	$ 0.20	$ 0.04	$ 0.03	$ 0.04	$ 0.31	$ 0.31
Earnings Per Share, Basic									0.31
Earnings Per Share, Diluted									$ 0.31	$ 0.31
Royal Bancshares [Member]
Summary of the consolidated results of operations on a quarterly basis [Abstract]
Other expenses									$ 972	$ 942
Loss before income taxes and equity in undistributed net income									(950)	(922)
Net income attributable to Royal Bancshares of Pennsylvania, Inc.									$ 10,375	$ 10,993