This line item represents the cash payment for liens specified as percentage of redemption amount.

No definition available.

Name:	rbpaa_CashPaymentForLiensSpecifiedAsPercentageOfRedemptionAmount
Namespace Prefix:	rbpaa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This line item represents the interest rate on tax liens acquired during the period.

+ References

No definition available.

+ Details

Name:	rbpaa_InterestRateOnTaxLiensAcquired
Namespace Prefix:	rbpaa_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

This line item represents the payment period from date of written notice.

+ References

No definition available.

+ Details

Name:	rbpaa_PaymentPeriodFromDateOfWrittenNotice
Namespace Prefix:	rbpaa_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

+ Details

Name:	us-gaap_LossContingencyLossInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_LitigationCaseAxis=rbpaa_ConsolidatedMasterClassActionComplaintMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=rbpaa_CrusaderServicingCorporationMember
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:

- Details

Name:	us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=rbpaa_RoyalTaxLienServicesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Legal Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
Legal Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 30, 2013
Loss Contingencies [Line Items]
Loss contingency	$ (200)
The "Complaint"
Loss Contingencies [Line Items]
Loss contingency			$ 1,650
Cash payment for liens specified as percentage of redemption amount (in hundredths)			85.00%
Payment period from date of written notice		35 days
Interest rate on tax liens acquired			0.00%
Crusader Servicing Corporation [Member] \| Royal Bank [Member]
Loss Contingencies [Line Items]
Ownership interest (as a percent)	80.00%
Royal Tax Lien Services [Member] \| Royal Bank [Member]
Loss Contingencies [Line Items]
Ownership interest (as a percent)				60.00%