Represents the area of real estate secured for unfunded pension obligations.

No definition available.

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

- Definition

Represents the additional security provided to support the unfunded liabilities of the pension plans.

+ References

No definition available.

+ Details

Name:	mlp_DefinedBenefitPlanAdditionalSecurityToSupportUnfundedLiabilities
Namespace Prefix:	mlp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Represents the area of real estate property pledged as security.

+ References

No definition available.

+ Details

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

- Definition

Represents the period for release of real estate property pledged as collateral.

+ References

No definition available.

+ Details

Name:	mlp_DefinedBenefitPlanPeriodForReleaseOfRealEstatePropertyPledgedAsSecurity
Namespace Prefix:	mlp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

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- Definition

Reflects for the period the total of the carrying amount of the commercial, industrial and residential land and buildings sold plus certain overhead and other costs incurred to place the real estate in saleable condition, capitalized interest costs in the properties sold, and inventory impairment losses recognized. This element would most likely be used by an entity whose principal activities involve real estate or which has significant real estate operations.

+ 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 210.5-03.2)

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

+ Details

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

- Definition

Amount before tax, after reclassification adjustments, of actuarial gain (loss) that has not been recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669646-108580

+ Details

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

- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period.

+ References

No definition available.

+ Details

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

- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

+ References

+ Details

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

- Definition

The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585

+ Details

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

- Details

Name:	us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis=mlp_AgricultureMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=mlp_WestMauiMember
Namespace Prefix:
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Note 9 - Accrued Retirement Benefits (Details) (USD $)	1 Months Ended	12 Months Ended		0 Months Ended	1 Months Ended
Note 9 - Accrued Retirement Benefits (Details) (USD $)	Nov. 30, 2012 acre	Dec. 31, 2014	Dec. 31, 2013	Oct. 09, 2014	Oct. 30, 2014	Oct. 31, 2011
Note 9 - Accrued Retirement Benefits (Details) [Line Items]
Defined Benefit Plan, Amounts Recognized in Other Comprehensive Income (Loss), Net Actuarial Gain (Loss), before Tax		$ 25,600,000	$ 19,700,000
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year		800,000
Defined Benefit Plan, Additional Security to Support Unfunded Liabilities						23,900,000
Area of Real Estate Property Pledged as Security (in Acres)	8,400
Defined Benefit Plan, Period for Release of Real Estate Property Pledged as Security	5 years
Proceeds from Sale of Productive Assets		2,276,000	3,904,000
Area of Real Estate Property Held as Collateral for Unfunded Pension Obligations (in Acres)				8,400
Cost of Real Estate Sales		1,294,000us-gaap_CostOfRealEstateSales	2,420,000us-gaap_CostOfRealEstateSales
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year		2,800,000	2,100,000
Agriculture [Member] \| West Maui [Member]
Note 9 - Accrued Retirement Benefits (Details) [Line Items]
Proceeds from Sale of Productive Assets				19,800,000
Cost of Real Estate Sales				400,000
West Maui [Member]
Note 9 - Accrued Retirement Benefits (Details) [Line Items]
Proceeds from Sale of Productive Assets					$ 19,800,000