XML 46 R35.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Company's Repurchase Activities (Detail) - $ / shares shares in Thousands | 1 Months Ended | 3 Months Ended | 67 Months Ended |  |
--- | --- | --- | --- | --- | ---
Apr. 30, 2018 | Mar. 31, 2018 | Feb. 28, 2018 | Mar. 31, 2018 | Jan. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017
Plan III Common Units Repurchase Program |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |
Maximum Number of Units that May Yet Be Purchased |  |  | 4,219 | 5,242 | [1] | 4,219 | 2,207 | 2,207 | 2,207
Total Number of Units Purchased |  |  | 1,023 | 258 |  | 1,281 | 2,700 |  |
Average Price Paid per Unit | [2] |  | $ 9.36 | $ 9.48 |  | $ 9.38 |  |  |
Plan III Common Units Repurchase Program | Subsequent Event |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |
Maximum Number of Units that May Yet Be Purchased | [3] | 3,593 |  |  |  |  |  |  |
Total Number of Units Purchased | [3] | 626 |  |  |  |  |  |  |
Average Price Paid per Unit | [2],[3] | $ 9.71 |  |  |  |  |  |  |
Publicly Announced Plans or Programs As Part of Plan III Common Units Repurchase Program |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |
Total Number of Units Purchased |  |  | 1,023 | 258 |  | 1,281 |  |  |
Publicly Announced Plans or Programs As Part of Plan III Common Units Repurchase Program | Subsequent Event |  |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |  |
Total Number of Units Purchased | [3] | 626 |  |  |  |  |  |  |
[1] | In February 2018, the Board authorized an increase in the number of Common Units available for repurchase from 2.2 million to 5.5 million.
[2] | Amount includes repurchase costs.
[3] | See Note 14 - Subsequent Events

X
- Definition Average price paid per unit. + References No definition available. + Details
Name: | sgu_AveragePricePaidPerUnit
Namespace Prefix: | sgu_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition 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. + References No definition available. + Details
Name: | us-gaap_CapitalUnitLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The remaining number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of shares that have been repurchased and retired during the period. + 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(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 Reference 4: 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(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=sgu_StockRepurchaseProgramThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=sgu_PubliclyAnnouncedPlansOrProgramsAsPartOfStockRepurchaseProgramThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |