Condensed Financial Information - Parent Company Only - Cash Flow Statement (Details) - USD ($) $ 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
Cash flows from operating activities:
Net income (loss)	$ 4,122	$ 2,030	$ 2,034	$ 2,189	$ 6,407	$ 1,534	$ 1,461	$ 1,591	$ 10,375	$ 10,993
Adjustments to reconcile net income to net cash provided by operating activities:
Stock compensation expense									85	78
Interest on subordinated debentures									2	(17)
Net cash provided by operating activities									8,377	6,794
Cash flows from financing activities
Repurchase of preferred stock									(29,509)
Net cash used in financing activities									34,909	45,528
Net increase (decrease) in cash and cash equivalents									(4,190)	(5,370)
Cash and cash equivalents at the beginning of the period				25,420				30,790	25,420	30,790
Cash and cash equivalents at the end of the period	21,230				25,420				21,230	25,420
Royal Bancshares [Member]
Cash flows from operating activities:
Net income (loss)									10,375	10,993
Adjustments to reconcile net income to net cash provided by operating activities:
Stock compensation expense									85	78
Undistributed losses from subsidiaries									(11,325)	(11,915)
Dividends from nonbanking subsidiary									21,193	5,000
Other Operating Activities, Cash Flow Statement									56	(264)
Net cash provided by operating activities									20,384	3,892
Cash flows from financing activities
Repurchase of preferred stock									(29,509)
Net cash used in financing activities									(29,509)
Net increase (decrease) in cash and cash equivalents									(9,125)	3,892
Cash and cash equivalents at the beginning of the period				$ 10,152				$ 6,260	10,152	6,260
Cash and cash equivalents at the end of the period	$ 1,027				$ 10,152				$ 1,027	$ 10,152