Name:	rbpaa_ActualRatioUnderRapAbstract
Namespace Prefix:	rbpaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Name:	rbpaa_ActualRatioUnderUsGaapAbstract
Namespace Prefix:	rbpaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	rbpaa_AdjustmentsToNetLossAsWellAsCapitalRatiosAbstract
Namespace Prefix:	rbpaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	rbpaa_CapitalActualAmountUnderRegulationsAbstract
Namespace Prefix:	rbpaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Total capital divided by risk weighted assets as adjusted for RAP.

+ References

No definition available.

+ Details

Name:	rbpaa_CapitalToRiskWeightedAssetsAdjustedForRap
Namespace Prefix:	rbpaa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Total Capital divided by risk weighted assets as defined in the regulations.

+ References

No definition available.

+ Details

Name:	rbpaa_CapitalToRiskWeightedAssetsUnderGaap
Namespace Prefix:	rbpaa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	rbpaa_ForCapitalAdequacyPurposesAmountAbstract
Namespace Prefix:	rbpaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	rbpaa_ForCapitalAdequacyPurposesRatioAbstract
Namespace Prefix:	rbpaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	rbpaa_RatiosAsAdjustedUnderUsGaapAbstract
Namespace Prefix:	rbpaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Refers to the net loss under regulatory accounting principles.

+ References

No definition available.

+ Details

Name:	rbpaa_RegulatoryAccountingPrinciplesNetLoss
Namespace Prefix:	rbpaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Refers to the amount of tax lien adjustment, net of non controlling interest.

+ References

No definition available.

+ Details

Name:	rbpaa_TaxLienAdjustmentNetOfNoncontrollingInterest
Namespace Prefix:	rbpaa_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Tier 1 Leverage Capital divided by average assets as adjusted for RAP.

+ References

No definition available.

+ Details

Name:	rbpaa_TierOneLeverageCapitalToAverageAssetsAdjustedForRap
Namespace Prefix:	rbpaa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 Leverage Capital divided by average assets as defined in the regulations.

+ References

No definition available.

+ Details

Name:	rbpaa_TierOneLeverageCapitalToAverageAssetsUnderGaap
Namespace Prefix:	rbpaa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 capital divided by risk weighted assets as adjusted for RAP.

+ References

No definition available.

+ Details

Name:	rbpaa_TierOneRiskBasedCapitalToRiskWeightedAssetsAdjustedForRap
Namespace Prefix:	rbpaa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 capital divided by risk weighted assets as defined by regulations.

+ References

No definition available.

+ Details

Name:	rbpaa_TierOneRiskBasedCapitalToRiskWeightedAssetsUnderGaap
Namespace Prefix:	rbpaa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	rbpaa_ToBeWellCapitalizedUnderPromptCorrectiveActionProvisionAmountAbstract
Namespace Prefix:	rbpaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	rbpaa_ToBeWellCapitalizedUnderPromptCorrectiveActionProvisionRatioAbstract
Namespace Prefix:	rbpaa_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of total capital as defined in the regulations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 10

-Section 50

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1H

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1H

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 948

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998

+ Details

Name:	us-gaap_Capital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum amount of Total Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_CapitalRequiredForCapitalAdequacy
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1H

-Subparagraph (c)(2)

-URI http://asc.fasb.org/extlink&oid=35709795&loc=d3e65071-112826

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1B

-URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958570-112826

+ Details

Name:	us-gaap_CapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of Total Capital required to be categorized as well as capitalized under the regulatory framework for prompt corrective action.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826

+ Details

Name:	us-gaap_CapitalRequiredToBeWellCapitalized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The Total risk based capital ratio (total capital divided by risk weighted assets) required to be categorized as "well capitalized", in the regulatory framework for prompt corrective action.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 505

-Section 50

-Paragraph 1

-Subparagraph (c)(1)

-URI http://asc.fasb.org/extlink&oid=35709795&loc=SL5958568-112826

+ Details

Name:	us-gaap_CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Total Capital divided by risk weighted assets as defined in the regulations.

+ References

+ Details

Name:	us-gaap_CapitalToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Other Comprehensive Income

-URI http://asc.fasb.org/extlink&oid=6519514

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Net Income

-URI http://asc.fasb.org/extlink&oid=6518256

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.19)

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.18)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-04.22)

-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 19

-Article 5

Reference 9: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Paragraph 20

-Article 9

+ Details

Name:	us-gaap_NetIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum amount of Tier 1 Leverage Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacy
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of Tier 1 Leverage Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The amount of Tier 1 Leverage Capital required to be categorized as well capitalized divided by average assets as defined in the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapitalRequiredToBeWellCapitalizedToAverageAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 Leverage Capital divided by average assets as defined in the regulations.

+ References

+ Details

Name:	us-gaap_TierOneLeverageCapitalToAverageAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 Risk Based Capital as defined in the regulations.

+ References

+ Details

Name:	us-gaap_TierOneRiskBasedCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacy
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The amount of Tier 1 Risk Based Capital required to be categorized as well capitalized under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The Tier 1 capital ratio (Tier 1 capital divided by risk weighted assets) required to be categorized as "well capitalized" under the regulatory framework for prompt corrective action.

+ References

+ Details

Name:	us-gaap_TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Tier 1 capital divided by risk weighted assets as defined by regulations.

+ References

+ Details

Name:	us-gaap_TierOneRiskBasedCapitalToRiskWeightedAssets
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=us-gaap_ParentCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=us-gaap_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

REGULATORY CAPITAL REQUIREMENTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Adjustments to net loss as well as the capital ratios [Abstract]
Net income	$ 811us-gaap_NetIncomeLoss	$ 1,423us-gaap_NetIncomeLoss	$ 1,378us-gaap_NetIncomeLoss	$ 1,498us-gaap_NetIncomeLoss	$ 2,452us-gaap_NetIncomeLoss	$ 342us-gaap_NetIncomeLoss	$ (803)us-gaap_NetIncomeLoss	$ 118us-gaap_NetIncomeLoss	$ 5,110us-gaap_NetIncomeLoss	$ 2,109us-gaap_NetIncomeLoss
Royal Bank
Capital actual amount under regulations [Abstract]
Total capital (to risk-weighted assets)	78,582				71,417				78,582	71,417
Tier I capital (to risk-weighted assets)	72,330				65,602				72,330	65,602
Tier I capital (to average assets, leverage)	72,330				65,602				72,330	65,602
Actual Ratio Under RAP [Abstract]
Total capital (to risk-weighted assets) (as a percent)	15.89%				15.61%				15.89%	15.61%
Tier I capital (to risk-weighted assets) (in hundredths)	14.62%				14.34%				14.62%	14.34%
Tier I capital (to average assets, leverage) (as a percent)	10.12%				9.13%				10.12%	9.13%
For capital adequacy purposes, amount [Abstract]
Total capital (to risk-weighted assets)	39,573				36,590				39,573	36,590
Tier I capital (to risk-weighted assets)	19,787				18,295				19,787	18,295
Tier I capital (to average assets, leverage)	28,585				28,739				28,585	28,739
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)	4.00%				4.00%				4.00%	4.00%
Tier I capital (to average assets, leverage) (in hundredths)	4.00%				4.00%				4.00%	4.00%
To be well capitalized under prompt corrective action provision, amount [Abstract]
Total capital (to risk-weighted assets)	49,466				45,737				49,466	45,737
Tier I capital (to risk-weighted assets)	29,680				27,442				29,680	27,442
Tier I capital (to average assets, leverage)	35,731				35,924				35,731	35,924
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%
Tier I capital (to average assets, leverage) (in hundredths)	5.00%				5.00%				5.00%	5.00%
Adjustments to net loss as well as the capital ratios [Abstract]
RAP net loss									1,924	(139)
Tax lien adjustment, net of noncontrolling interest									3,170	2,844
Net income									5,094	2,705
Actual Ratio Under US GAAP [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	16.44%				16.49%				16.44%	16.49%
Tier I capital (to risk-weighted assets) (in hundredths)	15.17%				15.22%				15.17%	15.22%
Tier I capital (to average assets, leverage) (in hundredths)	10.52%				9.73%				10.52%	9.73%
Ratios As Adjusted Under RAP [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	15.89%				15.61%				15.89%	15.61%
Tier I capital (to risk-weighted assets) (in hundredths)	14.62%				14.34%				14.62%	14.34%
Tier I capital (to average assets, leverage) (in hundredths)	10.12%				9.13%				10.12%	9.13%
Royal Bancshares
Capital actual amount under regulations [Abstract]
Total capital (to risk-weighted assets)	95,944				84,384				95,944	84,384
Tier I capital (to risk-weighted assets)	86,329				71,432				86,329	71,432
Tier I capital (to average assets, leverage)	86,329				71,432				86,329	71,432
Actual Ratio Under RAP [Abstract]
Total capital (to risk-weighted assets) (as a percent)	19.20%				18.09%				19.20%	18.09%
Tier I capital (to risk-weighted assets) (in hundredths)	17.27%				15.31%				17.27%	15.31%
Tier I capital (to average assets, leverage) (as a percent)	11.88%				9.79%				11.88%	9.79%
For capital adequacy purposes, amount [Abstract]
Total capital (to risk-weighted assets)	39,986				37,315				39,986	37,315
Tier I capital (to risk-weighted assets)	19,993				18,658				19,993	18,658
Tier I capital (to average assets, leverage)	29,056				29,178				29,056	29,178
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)	4.00%				4.00%				4.00%	4.00%
Tier I capital (to average assets, leverage) (in hundredths)	4.00%				4.00%				4.00%	4.00%
Adjustments to net loss as well as the capital ratios [Abstract]
RAP net loss									1,940	(735)
Tax lien adjustment, net of noncontrolling interest									(3,170)	(2,844)
Net income									$ 5,110	$ 2,109
Actual Ratio Under US GAAP [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	19.20%				18.09%				19.20%	18.09%
Tier I capital (to risk-weighted assets) (in hundredths)	17.27%				15.31%				17.27%	15.31%
Tier I capital (to average assets, leverage) (in hundredths)	11.88%				9.79%				11.88%	9.79%
Ratios As Adjusted Under RAP [Abstract]
Total capital (to risk-weighted assets) (in hundredths)	18.67%				17.24%				18.67%	17.24%
Tier I capital (to risk-weighted assets) (in hundredths)	16.74%				14.10%				16.74%	14.10%
Tier I capital (to average assets, leverage) (in hundredths)	11.49%				8.98%				11.49%	8.98%