Allowance for Loan Losses (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016
Allowance for Loan Losses [Roll Forward]
Beginning Balance	$ 15,580	$ 16,136	$ 18,043
Charge-offs	(2,041)	(2,066)	(5,680)
Recoveries	494	48	733
Provisions	2,500	1,462	3,040
Ending Balance	16,533	15,580	16,136
Loans and Allowances for Loan Losses [Abstract]
Allowances for loan losses, Individually evaluated for impairment				$ 458	$ 1,251
Allowances for loan losses, Collectively evaluated for impairment				16,075	14,329
Allowance for loan losses	15,580	16,136	18,043	16,533	15,580
Loans, Individually evaluated for impairment				25,452	36,405
Loans, Collectively evaluated for impairment				986,265	815,548
Total Loans				1,011,717	851,953
Commercial
Allowance for Loan Losses [Roll Forward]
Beginning Balance	1,188	952	1,679
Charge-offs	(134)	(76)	(1,554)
Recoveries	45	8	121
Provisions	(415)	304	706
Ending Balance	684	1,188	952
Loans and Allowances for Loan Losses [Abstract]
Allowances for loan losses, Individually evaluated for impairment				0	138
Allowances for loan losses, Collectively evaluated for impairment				684	1,050
Allowance for loan losses	1,188	952	1,679	684	1,188
Loans, Individually evaluated for impairment				17	159
Loans, Collectively evaluated for impairment				38,955	26,615
Total Loans				38,972	26,774
Consumer
Allowance for Loan Losses [Roll Forward]
Beginning Balance	236	275	262
Charge-offs	0	(6)	(1)
Recoveries	0	0	0
Provisions	(6)	(33)	14
Ending Balance	230	236	275
Loans and Allowances for Loan Losses [Abstract]
Allowances for loan losses, Individually evaluated for impairment				0	0
Allowances for loan losses, Collectively evaluated for impairment				230	236
Allowance for loan losses	236	275	262	230	236
Loans, Individually evaluated for impairment				81	107
Loans, Collectively evaluated for impairment				16,168	16,613
Total Loans				16,249	16,720
Residential \| Real Estate \| Real Estate Construction
Allowance for Loan Losses [Roll Forward]
Beginning Balance	268	247	316
Charge-offs	0	0	(238)
Recoveries	0	0	0
Provisions	131	21	169
Ending Balance	399	268	247
Loans and Allowances for Loan Losses [Abstract]
Allowances for loan losses, Individually evaluated for impairment				0	0
Allowances for loan losses, Collectively evaluated for impairment				399	268
Allowance for loan losses	268	247	316	399	268
Loans, Individually evaluated for impairment				0	0
Loans, Collectively evaluated for impairment				28,486	8,825
Total Loans				28,486	8,825
Commercial \| Real Estate \| Real Estate Construction
Allowance for Loan Losses [Roll Forward]
Beginning Balance	2,496	2,501	3,015
Charge-offs	(687)	(1,081)	(2,745)
Recoveries	0	0	0
Provisions	(140)	1,076	2,231
Ending Balance	1,669	2,496	2,501
Loans and Allowances for Loan Losses [Abstract]
Allowances for loan losses, Individually evaluated for impairment				135	155
Allowances for loan losses, Collectively evaluated for impairment				1,534	2,341
Allowance for loan losses	2,496	2,501	3,015	1,669	2,496
Loans, Individually evaluated for impairment				5,952	8,386
Loans, Collectively evaluated for impairment				61,187	50,083
Total Loans				67,139	58,469
Commercial – Owner Occupied \| Real Estate \| Real Estate Mortgage
Allowance for Loan Losses [Roll Forward]
Beginning Balance	2,082	3,267	3,296
Charge-offs	(430)	0	0
Recoveries	113	1	66
Provisions	252	(1,186)	(95)
Ending Balance	2,017	2,082	3,267
Loans and Allowances for Loan Losses [Abstract]
Allowances for loan losses, Individually evaluated for impairment				58	498
Allowances for loan losses, Collectively evaluated for impairment				1,959	1,584
Allowance for loan losses	2,082	3,267	3,296	2,017	2,082
Loans, Individually evaluated for impairment				3,790	4,380
Loans, Collectively evaluated for impairment				122,460	119,518
Total Loans				126,250	123,898
Commercial – Non-owner Occupied \| Real Estate \| Real Estate Mortgage
Allowance for Loan Losses [Roll Forward]
Beginning Balance	3,889	3,838	4,962
Charge-offs	(622)	(154)	(638)
Recoveries	319	0	398
Provisions	1,044	205	(884)
Ending Balance	4,630	3,889	3,838
Loans and Allowances for Loan Losses [Abstract]
Allowances for loan losses, Individually evaluated for impairment				250	226
Allowances for loan losses, Collectively evaluated for impairment				4,380	3,663
Allowance for loan losses	3,889	3,838	4,962	4,630	3,889
Loans, Individually evaluated for impairment				12,401	19,000
Loans, Collectively evaluated for impairment				258,071	249,123
Total Loans				270,472	268,123
Residential – 1 to 4 Family \| Real Estate \| Real Estate Mortgage
Allowance for Loan Losses [Roll Forward]
Beginning Balance	4,916	4,802	4,156
Charge-offs	(118)	(704)	(504)
Recoveries	17	39	148
Provisions	1,462	779	1,002
Ending Balance	6,277	4,916	4,802
Loans and Allowances for Loan Losses [Abstract]
Allowances for loan losses, Individually evaluated for impairment				15	234
Allowances for loan losses, Collectively evaluated for impairment				6,262	4,682
Allowance for loan losses	4,916	4,802	4,156	6,277	4,916
Loans, Individually evaluated for impairment				3,211	4,065
Loans, Collectively evaluated for impairment				413,106	305,275
Total Loans				416,317	309,340
Residential – Multifamily \| Real Estate \| Real Estate Mortgage
Allowance for Loan Losses [Roll Forward]
Beginning Balance	505	254	357
Charge-offs	(50)	(45)	0
Recoveries	0	0	0
Provisions	172	296	(103)
Ending Balance	627	505	254
Loans and Allowances for Loan Losses [Abstract]
Allowances for loan losses, Individually evaluated for impairment				0	0
Allowances for loan losses, Collectively evaluated for impairment				627	505
Allowance for loan losses	$ 505	$ 254	$ 357	627	505
Loans, Individually evaluated for impairment				0	308
Loans, Collectively evaluated for impairment				47,832	39,496
Total Loans				$ 47,832	$ 39,804

Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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

- Definition

Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

+ References

+ Details

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

- References

No definition available.

+ Details

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

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

+ Details

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

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

+ Details

Name:	us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The balance of financing receivables that were collectively evaluated for impairment.

+ References

+ Details

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

- Definition

The balance of financing receivables that were individually evaluated for impairment.

+ References

+ Details

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

- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.7(d))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L.1)
-URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544

+ Details

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

- Definition

Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

+ Details

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

- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

+ Details

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

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=us-gaap_ResidentialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=pkbk_RealEstatePortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_CollateralAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=pkbk_MortgageOnCommercialPropertyOccupiedByOwnerMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=pkbk_MortgageOnCommercialPropertyOccupiedByNonOwnersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=pkbk_MortgageOnResidentialPropertiesOccupiedByOneToFourFamiliesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CollateralAxis=pkbk_MortgageOnResidentialPropertiesOccupiedByMultifamilyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: