The number of financing receivables as of a balance sheet date that are classified as troubled debt restructurings.

No definition available.

Name:	rbpaa_FinancingReceivablesModificationsNumberOfContracts
Namespace Prefix:	rbpaa_
Data Type:	xbrli:integerItemType
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_FinancingReceivableModificationsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of the outstanding recorded investment related to financing receivables that have been modified by troubled debt restructurings.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 40
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=25495931&loc=d3e18845-111554

+ Details

Name:	us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Recorded investment of consumer mortgage loan receivables secured by residential real estate properties for which formal foreclosure proceedings are in process.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 35
-URI http://asc.fasb.org/extlink&oid=49124121&loc=SL49126937-111524

+ Details

Name:	us-gaap_MortgageLoansInProcessOfForeclosureAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of land and buildings obtained through foreclosure proceedings or defeasance in full or partial satisfaction of a debt arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5162-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4437-111522

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 28
-Article 12

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 04
-Paragraph c
-Subparagraph Schedule III
-Article 5

+ Details

Name:	us-gaap_RealEstateAcquiredThroughForeclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	rbpaa_AccrualStatusAndNonAccrualStatusOfRestructuredLoansAxis=rbpaa_AccrualStatusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rbpaa_AccrualStatusAndNonAccrualStatusOfRestructuredLoansAxis=rbpaa_NonAccrualStatusMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_CommercialRealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ConstructionLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_CommercialLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rbpaa_TypeofforeclosureAxis=rbpaa_ForeclosedLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rbpaa_TypeofforeclosureAxis=rbpaa_ForeclosedLoansResidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Loans and Leases - Troubled Debt Restructuring (Details)	Jun. 30, 2016 USD ($) loan	Dec. 31, 2015 USD ($) loan	Dec. 31, 2014 USD ($)
Financing Receivable, Modifications [Line Items]
Number of loans \| loan	5,000	6
Total TDRs	$ 2,298,000	$ 2,576,000
Foreclosed residential real estate property	7,208,000	7,435,000	$ 9,779,000
Mortgage Loans in Process of Foreclosure, Amount	446,000
Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	1,976,000	2,339,000
Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 322,000	$ 237,000
Commercial real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans \| loan	1,000	1
Total TDRs	$ 21,000	$ 24,000
Commercial real estate [Member] \| Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 21,000	$ 24,000
Construction and land development [Member]
Financing Receivable, Modifications [Line Items]
Number of loans \| loan	1,000	1
Total TDRs	$ 145,000	$ 145,000
Construction and land development [Member] \| Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 145,000	$ 145,000
Commercial and industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of loans \| loan	2,000	3
Total TDRs	$ 2,046,000	$ 2,315,000
Commercial and industrial [Member] \| Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	1,869,000	$ 2,315,000
Commercial and industrial [Member] \| Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	$ 177,000
Residential real estate [Member]
Financing Receivable, Modifications [Line Items]
Number of loans \| loan	1,000	1
Total TDRs	$ 86,000	$ 92,000
Residential real estate [Member] \| Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs	86,000
Residential real estate [Member] \| Non Accrual Status [Member]
Financing Receivable, Modifications [Line Items]
Total TDRs		92,000
Loans [Member]
Financing Receivable, Modifications [Line Items]
Foreclosed residential real estate property	243,000	$ 220,000	$ 349,000
Loans, Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Foreclosed residential real estate property	$ 28,000