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Subsequent Events - Additional Information (Detail) - Subsequent Event - Dividend Declared $ / shares in Units, $ in Thousands | 1 Months Ended
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Oct. 31, 2018 USD ($) $ / shares
Subsequent Event [Line Items] |
Distribution declared | $ / shares | $ 0.1175
Partners capital projected distribution amount on annualized basis | $ / shares | 0.47
Minimum dividend distribution per unit | $ / shares | $ 0.0675
Amount to paid to common unit holders | $ 6,200
Amount to paid to the General Partner | 200
Incentive distribution to the General Partner | 170
Incentive distributions to management | $ 200
Dividend paid date | Nov. 06, 2018
Dividend record date | Oct. 29, 2018

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- Definition Incentive distribution to the general partner. + References No definition available. + Details
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- Definition Incentive distributions to management. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Minimum dividend distribution per unit. + References No definition available. + Details
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Period Type: | duration

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- Definition Partners capital projected distribution amount on annualized basis per share. + References No definition available. + Details
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Namespace Prefix: | sgu_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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- Definition Date the declared dividend will be paid, in CCYY-MM-DD format. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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- Definition Date the holder must own the stock to be entitled to the dividend, in CCYY-MM-DD format. + References No definition available. + Details
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- Definition The total amount of distributions to the general partner during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The total amount of distributions to limited partners. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
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Balance Type: | debit
Period Type: | duration

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- Definition The distribution amount per share for all classes of units. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 5 -Subparagraph (SAB TOPIC 4.F) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 272 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70434-108055 + Details
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Balance Type: | na
Period Type: | instant

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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- Details
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- Details
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Period Type: |