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

Represents the number of residential units sold to the plaintiffs.

No definition available.

Name:	mlp_NumberOfResidentialUnitsSoldToPlaintiffs
Namespace Prefix:	mlp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the number of whole-ownership units that are owned by group of owners who filed lawsuit against multiple parties.

No definition available.

Name:	mlp_NumberOfWholeOwnershipUnitsOwnedByGroupOfOwnersWhoFiledLawsuitAgainstMultipleParties
Namespace Prefix:	mlp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the percentage of capital costs to install filtration systems in water wells if the presence of a nematocide, commonly known as DBCP, exceeds specified levels, and for the ongoing maintenance and operating cost.

No definition available.

Name:	mlp_PercentageOfCapitalCostsAgreedToBePaidToInstallFiltrationSystemsInWaterWellIfPresenceOfNematocideExceedsSpecifiedLevelsAndForMaintenanceAndOperatingCosts
Namespace Prefix:	mlp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The minimum amount the entity agreed to spend under the long-term purchase commitment.

No definition available.

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

- Details

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

The carrying amount as of the balance sheet date of the combined total of loss contingency liabilities.

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=6952336&loc=d3e14326-108349

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

The charge against earnings in the period to increase loss contingency liabilities, net of any adjustments to reduce previously estimated charges.