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Regulatory Capital Requirements (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Adjustments to net loss as well as the capital ratios [Abstract]
Net income	$ 6,407	$ 1,534	$ 1,461	$ 1,591	$ 811	$ 1,423	$ 1,378	$ 1,498	$ 10,993	$ 5,110
Royal Bank [Member]
Capital actual amount under regulations [Abstract]
Total capital (to risk-weighted assets)	87,354				78,582				87,354	78,582
Tier I capital (to risk-weighted assets)	80,410				72,330				80,410	72,330
Tier I capital (to average assets, leverage)	80,410				72,330				80,410	72,330
Common equity Tier 1 (to risk-weighted assets)	58,824								58,824
For capital adequacy purposes, amount [Abstract]
Total capital (to risk-weighted assets)	44,225				39,573				44,225	39,573
Tier I capital (to risk-weighted assets)	33,169				19,787				33,169	19,787
Tier I capital (to average assets, leverage)	30,374				$ 28,585				30,374	$ 28,585
Common equity Tier 1 (to risk-weighted assets)	$ 24,876								$ 24,876
For capital adequacy purposes, ratio [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	8.00%				8.00%				8.00%	8.00%
Tier I capital (to risk-weighted assets) (in hundredths)	6.00%				4.00%				6.00%	4.00%
Tier I capital (to average assets, leverage) (in hundredths)	4.00%				4.00%				4.00%	4.00%
Common equity Tier 1 (to risk-weighted assets) (in hundredths)	4.50%								4.50%
To be well capitalized under prompt corrective action provision, amount [Abstract]
Total capital (to risk-weighted assets)	$ 55,281				$ 49,466				$ 55,281	$ 49,466
Tier I capital (to risk-weighted assets)	44,225				29,680				44,225	29,680
Tier I capital (to average assets, leverage)	37,968				$ 35,731				37,968	$ 35,731
Common equity Tier 1 (to risk-weighted assets)	$ 35,933								$ 35,933
To be well capitalized under prompt corrective action provision, ratio [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	10.00%				10.00%				10.00%	10.00%
Tier I capital (to risk-weighted assets) (in hundredths)	8.00%				6.00%				8.00%	6.00%
Tier I capital (to average assets, leverage) (in hundredths)	5.00%				5.00%				5.00%	5.00%
Common equity Tier 1 (to risk-weighted assets) (in hundredths)	6.50%								6.50%
To be well capitalized under the Federal Reserve's regulations, amount
Total capital (to risk-weighted assets)	$ 55,281				$ 49,466				$ 55,281	$ 49,466
Tier I capital (to risk-weighted assets)	$ 44,225				$ 29,680				$ 44,225	$ 29,680
To be well capitalized under the Federal Reserve's regulations, ratio
Total capital (to risk-weighted assets) (in hundredths)	10.00%				10.00%				10.00%	10.00%
Tier I capital (to risk-weighted assets) (in hundredths)	8.00%				6.00%				8.00%	6.00%
Adjustments to net loss as well as the capital ratios [Abstract]
RAP net loss									$ (9,161)	$ (1,924)
Tax lien adjustment, net of noncontrolling interest									(1,973)	(3,170)
Net income									$ 11,134	$ 5,094
Actual Ratio Under US GAAP [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	16.11%				16.44%				16.11%	16.44%
Tier I capital (to risk-weighted assets) (in hundredths)	14.85%				15.17%				14.85%	15.17%
Tier I capital (to average assets, leverage) (in hundredths)	10.82%				10.52%				10.82%	10.52%
Common equity Tier 1 (to risk-weighted assets) (in hundredths)	10.96%								10.96%
Ratios As Adjusted Under RAP [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	15.80%				15.89%				15.80%	15.89%
Tier I capital (to risk-weighted assets) (in hundredths)	14.55%				14.62%				14.55%	14.62%
Tier I capital (to average assets, leverage) (in hundredths)	10.59%				10.12%				10.59%	10.12%
Common equity Tier 1 (to risk-weighted assets) (in hundredths)	10.64%								10.64%
Royal Bancshares [Member]
Capital actual amount under regulations [Abstract]
Total capital (to risk-weighted assets)	$ 103,355				$ 95,944				$ 103,355	$ 95,944
Tier I capital (to risk-weighted assets)	95,316				86,329				95,316	86,329
Tier I capital (to average assets, leverage)	95,316				$ 86,329				95,316	$ 86,329
Common equity Tier 1 (to risk-weighted assets)	$ 52,115								$ 52,115
Actual Ratio Under RAP [Abstract]
Total capital (to risk-weighted assets) (as a percent)	18.57%				19.20%				18.57%	19.20%
Tier I capital (to risk-weighted assets) (in hundredths)	17.13%				17.27%				17.13%	17.27%
Tier I capital (to average assets, leverage) (as a percent)	12.44%				11.88%				12.44%	11.88%
Common equity Tier 1 (to risk-weighted assets) (in hundredths)	9.37%								9.37%
For capital adequacy purposes, amount [Abstract]
Total capital (to risk-weighted assets)	$ 44,516				$ 39,986				$ 44,516	$ 39,986
Tier I capital (to risk-weighted assets)	33,387				19,993				33,387	19,993
Tier I capital (to average assets, leverage)	30,638				$ 29,056				30,638	$ 29,056
Common equity Tier 1 (to risk-weighted assets)	$ 25,040								$ 25,040
For capital adequacy purposes, ratio [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	8.00%				8.00%				8.00%	8.00%
Tier I capital (to risk-weighted assets) (in hundredths)	6.00%				4.00%				6.00%	4.00%
Tier I capital (to average assets, leverage) (in hundredths)	4.00%				4.00%				4.00%	4.00%
Common equity Tier 1 (to risk-weighted assets) (in hundredths)	4.50%								4.50%
To be well capitalized under prompt corrective action provision, amount [Abstract]
Total capital (to risk-weighted assets)	$ 55,645				$ 49,983				$ 55,645	$ 49,983
Tier I capital (to risk-weighted assets)	$ 33,387				$ 29,990				$ 33,387	$ 29,990
To be well capitalized under prompt corrective action provision, ratio [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	10.00%				10.00%				10.00%	10.00%
Tier I capital (to risk-weighted assets) (in hundredths)	6.00%				6.00%				6.00%	6.00%
To be well capitalized under the Federal Reserve's regulations, amount
Total capital (to risk-weighted assets)	$ 55,645				$ 49,983				$ 55,645	$ 49,983
Tier I capital (to risk-weighted assets)	$ 33,387				$ 29,990				$ 33,387	$ 29,990
To be well capitalized under the Federal Reserve's regulations, ratio
Total capital (to risk-weighted assets) (in hundredths)	10.00%				10.00%				10.00%	10.00%
Tier I capital (to risk-weighted assets) (in hundredths)	6.00%				6.00%				6.00%	6.00%
Adjustments to net loss as well as the capital ratios [Abstract]
RAP net loss									$ (9,020)	$ (1,940)
Tax lien adjustment, net of noncontrolling interest									1,973	3,170
Net income									$ 10,993	$ 5,110
Ratios As Adjusted Under RAP [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	18.28%				18.67%				18.28%	18.67%
Tier I capital (to risk-weighted assets) (in hundredths)	16.71%				16.74%				16.71%	16.74%
Tier I capital (to average assets, leverage) (in hundredths)	12.13%				11.49%				12.13%	11.49%
Common equity Tier 1 (to risk-weighted assets) (in hundredths)	9.04%								9.04%