Additional Annual Payment to Term Loan Facility, Percentage of Excess Cash Flow

No definition available.

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- Definition

Availability in compliance with the fixed charge coverage ratio.

+ References

No definition available.

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- Definition

Availability percentage to maximum facility size.

+ References

No definition available.

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- Definition

Debt Instrument Leverage Ratio

+ References

No definition available.

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- Definition

Line Of Credit Facility Additional Borrowing Capacity For Working Capital Needs

+ References

No definition available.

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- Definition

Line Of Credit Facility Increase Additional Borrowing Capacity

+ References

No definition available.

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- Definition

Line of credit facility maximum borrowing capacity during the heating season.

+ References

No definition available.

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- Definition

Maximum increase allowed without bank consulting.

+ References

No definition available.

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- Definition

Minimum Fixed Charge Coverage Ratio On Revolving Credit Facilities

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ 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 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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-Topic 835
-SubTopic 30
-Section 45
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-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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- 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

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- Definition

Amount of the required periodic payments applied to principal.

+ References

+ Details

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Balance Type:	debit
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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Amount of the hedged item as of the balance sheet date related to the derivative. For example, the hedged balance on a debt instrument.

+ References

No definition available.

+ Details

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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-Publisher FASB
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

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- 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

+ Details

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 20, 22
-Article 5

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Long-Term Debt and Bank Facility Borrowings - Additional Information (Detail) - USD ($)	Jul. 30, 2015	Mar. 31, 2016	Sep. 30, 2015
Debt Instrument [Line Items]
Long-term debt, carrying Amount		$ 97,500,000	$ 100,000,000
Hedging positions and payable amounts secured under credit facility		7,900,000	15,300,000
Letters of credit issued and outstanding		49,600,000	54,800,000
Availability in compliance with the fixed charge coverage ratio		242,500,000	176,000,000
$100 million Term Loan
Debt Instrument [Line Items]
Long-term debt, carrying Amount		97,500,000	100,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Revolving credit facility outstanding		$ 97,500,000	$ 100,000,000
Third Amendment
Debt Instrument [Line Items]
Non Seasonal maximum borrowing capacity under revolving credit facility	$ 300,000,000
Maximum borrowing capacity (heating season December to April) under revolving credit facility	450,000,000
Issuance of line of credit for working capital purposes	$ 100,000,000
Revolving credit facility expiry	Jul. 30, 2020
Additional revolving credit	$ 100,000,000
Facility size that can be increased without consulting bank group	$ 100,000,000
Term loan annual payment percentage	25.00%
Debt instrument, effective interest rate		3.58%
Minimum fixed charge coverage ratio	110.00%
Availability percentage to maximum facility size	12.50%
Third Amendment \| $100 million Term Loan
Debt Instrument [Line Items]
Outstanding senior notes	$ 100,000,000
Senior secured term loan maturity period	5 years
Third Amendment \| $100 million Term Loan
Debt Instrument [Line Items]
Long-term debt, carrying Amount		$ 97,500,000
Third Amendment \| Quarterly
Debt Instrument [Line Items]
Term loan periodic payment	$ 2,500,000
Third Amendment \| December through April
Debt Instrument [Line Items]
Commitment fee on the unused portion of the facility	0.30%
Third Amendment \| May through November
Debt Instrument [Line Items]
Commitment fee on the unused portion of the facility	0.20%
Third Amendment \| Maximum \| Annually
Debt Instrument [Line Items]
Term loan periodic payment	$ 15,000,000
Third Amendment \| Maximum \| Quarters ending June or September
Debt Instrument [Line Items]
Senior secured leverage ratio	300.00%
Third Amendment \| Maximum \| Quarters ending December or March
Debt Instrument [Line Items]
Senior secured leverage ratio	450.00%