Area of real estate property pledged as collateral to a credit facility that was released during the period.

No definition available.

Name:	mlp_AreaOfRealEstatePropertyPledgedAsCollateralReleased
Namespace Prefix:	mlp_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of liquidity required to be maintained under financial covenants.

+ References

No definition available.

+ Details

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Namespace Prefix:	mlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Period of time between issuance and maturity of the optional extension period, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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Namespace Prefix:	mlp_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of optional extension periods available under credit facilities that the company has.

+ References

No definition available.

+ Details

Name:	mlp_NumberOfOptionalExtensionPeriods
Namespace Prefix:	mlp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Area of real estate owned but transferred to serve as collateral for the payment of the related debt obligation, primarily a secured borrowing or repurchase agreement, and for which the transferee is not permitted to sell or re-pledge them to an unrelated party.

+ References

No definition available.

+ Details

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Namespace Prefix:	mlp_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the fee for available but unused credit capacity under the credit facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Name Accounting Standards Codification
-Topic 942
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-Section S99
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-Name Accounting Standards Codification
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3291-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

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

- Definition

Revenue from the sale of commercial, industrial, or residential property during the period. This element is more likely than not relevant to an entity for which real estate operations are a principal activity. If real estate operations are not a principal activity, the reporting entity would likely use a gain (loss) on sale of property, plant, or equipment type element.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

+ Details

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

- Details

Name:	us-gaap_StatementGeographicalAxis=mlp_WestMauiMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis=mlp_KapaluaVillageCenterMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LineOfCreditFacilityAxis=mlp_FirstHawaiianBankRevolvingLineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=mlp_KapaluaMaukaMember
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Data Type:	na
Balance Type:
Period Type:

- Details

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Data Type:	na
Balance Type:
Period Type:

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Note 4 - Long-term Debt (Details Textual)			1 Months Ended	12 Months Ended
Note 4 - Long-term Debt (Details Textual)	Dec. 30, 2016 USD ($) a	Aug. 05, 2016 USD ($)	Dec. 31, 2016 USD ($) a	Dec. 31, 2016 USD ($) a	Dec. 31, 2015 USD ($)
Long-term Debt		$ 26,400,000	$ 6,857,000	$ 6,857,000	$ 40,565,000
Sales of Real Estate				$ 36,000,000	$ 12,000,000
West Maui [Member] \| Kapalua Village Center [Member]
Sales of Real Estate	$ 18,000,000		$ 18,000,000
First Hawaiian Bank Revolving Line of Credit [Member] \| Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity		$ 27,000,000
Number of Optional Extension Periods		2
Line of Credit Facility, Extension Period		1
Repayments of Lines of Credit	17,600,000
Line of Credit Facility, Commitment Fee Amount	$ 10	$ 0
First Hawaiian Bank Revolving Line of Credit [Member] \| Revolving Credit Facility [Member] \| Kapalua Mauka [Member]
Pledged Assets not Separately Reported Area of Real Estate \| a			800	800
First Hawaiian Bank Revolving Line of Credit [Member] \| Revolving Credit Facility [Member] \| Kapalua Resort [Member]
Pledged Assets not Separately Reported Area of Real Estate \| a			30,000	30,000
First Hawaiian Bank Revolving Line of Credit [Member] \| Revolving Credit Facility [Member] \| West Maui [Member]
Area of Real Estate Property Pledged as Collateral, Released \| a	46
First Hawaiian Bank Revolving Line of Credit [Member] \| Revolving Credit Facility [Member] \| Upcountry Maui [Member]
Area of Real Estate Property Pledged as Collateral, Released \| a	1,065
First Hawaiian Bank Revolving Line of Credit [Member] \| Revolving Credit Facility [Member] \| Minimum [Member]
Debt Instrument, Covenant Required Liquidity			$ 500,000	$ 500,000
First Hawaiian Bank Revolving Line of Credit [Member] \| Revolving Credit Facility [Member] \| Maximum [Member]
Debt Instrument, Covenant Required Liquidity			$ 45,000,000	$ 45,000,000
First Hawaiian Bank Revolving Line of Credit [Member] \| Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument, Basis Spread on Variable Rate	3.50%	3.75%