XML 54 R42.htm IDEA: XBRL DOCUMENT
v3.19.1

Common Unit Repurchase and Retirement - Additional Information (Detail) - USD ($) shares in Thousands |  | 1 Months Ended | 3 Months Ended | 72 Months Ended | 81 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 02, 2018 | Mar. 31, 2019 | Feb. 28, 2019 | Jan. 31, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Mar. 31, 2019
Capital Unit [Line Items] |  |  |  |  |  |  |  |
Availability required to repurchase common units | $ 45,000,000 |  |  |  |  |  |  |
Percentage of the maximum facility size on a historical proforma and forward-looking basis | 15.00% |  |  |  |  |  |  |
Non Seasonal maximum borrowing capacity under revolving credit facility | $ 300,000,000 |  |  |  |  |  |  |
Minimum fixed charge coverage ratio for distributions to unit holders or to repurchase common units | 115.00% |  |  |  |  |  |  |
Repurchase Plan |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |
Company's common units repurchased and retired |  | 197 | 1,474 | 516 | 2,187 | 599 | 7,937 |
Company's common units authorized for repurchase |  |  |  |  |  |  | 10,900 |
Common Stock Available for Repurchase Under Open Market Transactions |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |
Company's common units authorized for repurchase |  |  |  |  |  |  | 8,400 |
Common Stock Available for Repurchase Under Privately Negotiated Transactions |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |
Company's common units repurchased and retired |  |  |  |  |  |  |  | 1,200
Company's common units authorized for repurchase |  |  |  |  |  |  | 2,500 |
Common Stock Repurchase Under Open Market Transactions |  |  |  |  |  |  |  |
Capital Unit [Line Items] |  |  |  |  |  |  |  |
Company's common units repurchased and retired |  |  |  |  |  |  |  | 7,100

X
- Definition Availability required to pay distributions or repurchase common units. + References No definition available. + Details
Name: | sgu_AvailabilityRequiredToPayDistributionsOrRepurchaseCommonUnits
Namespace Prefix: | sgu_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Minimum fixed charge coverage ratio for distributions to unit holders or repurchase common units. + References No definition available. + Details
Name: | sgu_MinimumFixedChargeCoverageRatioForDistributionsToUnitholdersOrRepurchaseCommonUnits
Namespace Prefix: | sgu_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum percentage of borrowing capacity to pay any distributions to unitholders or repurchase common units. + References No definition available. + Details
Name: | sgu_MinimumPercentageOfBorrowingCapacityToPayAnyDistributionsToUnitholdersOrRepurchaseCommonUnits
Namespace Prefix: | sgu_
Data Type: | num:percentItemType
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 Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The 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_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
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://fasb.org/us-gaap/role/ref/legacyRef -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://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 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + 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_CommonStockRepurchaseProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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