XML 62 R48.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Company's Repurchase Activities (Parenthetical) (Detail) shares in Thousands | Sep. 30, 2017 shares
--- | ---
Capital Unit [Line Items] |
Company's common units authorized for repurchase | 7,344
Private Transaction |
Capital Unit [Line Items] |
Company's common units authorized for repurchase | 2,450

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