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Data Type:	xbrli:monetaryItemType
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This item represents the pretax change in net unrealized holding gain (loss) on available-for-sale securities held within the trust during the period.

No definition available.

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Capital Gain (Loss) Distribution

No definition available.

Name:	ston_CapitalGainLossDistribution
Namespace Prefix:	ston_
Data Type:	xbrli:monetaryItemType
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The amount deposited into the merchandise trust for the period. Pursuant to state law, a portion of the proceeds from pre-need sales of merchandise and services is placed in the trust until the requirements for releasing the principal are met, which is generally the delivery of merchandise or performance of services.

No definition available.

Name:	ston_DepositIntoMerchandiseTrust
Namespace Prefix:	ston_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The aggregate fair value of investments placed into merchandise trusts. Pursuant to state law, a portion of the proceeds from pre-need sales of merchandise and services is placed in the trust until the requirements for releasing the principal are met, which is generally the delivery of merchandise or performance of services. All investment earnings related to merchandise trust assets are deferred until the associated merchandise is delivered or the services are performed.

No definition available.

Name:	ston_MerchandiseTrusts
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Merchandise trusts including assets held for sale.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Tax expense on transactions occurring within the merchandise trust during the period.

No definition available.

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Namespace Prefix:	ston_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Amount of realized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
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Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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Amount of other-than-temporary impairment (OTTI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized in earnings and other comprehensive loss (OCI).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Cash received for dividends and interest on the entity's equity and debt investments during the current period.

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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.

No definition available.

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

Fees charged annually for the professional services of a trustee, usually quoted as a percentage of the funds being managed. The fee for appointing an offshore Trustee is included in the trust price.

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