The number of facilities acquired by the entity during the period.

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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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

Represents the aggregate of total long-term debt, including current maturities and short-term debt.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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

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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Amount of long-term debt and capital lease obligation due after one year or beyond the normal operating cycle, if longer.

+ 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))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of long-term debt and capital leases due within one year or the normal operating cycle, if longer.

+ 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 210.5-02.20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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- Details

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Period Type:

- Details

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- Details

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- Details

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- Details

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Data Type:	na
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- Details

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- Details

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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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Financing Arrangements (Details) CAD in Millions, $ in Millions	Oct. 18, 2017 CAD facility	Sep. 19, 2017 facility	Nov. 30, 2017 USD ($)	May 31, 2017 USD ($)
Financing Arrangements
Total debt			$ 219.4	$ 159.3
Current maturities of debt			(1.7)	(2.0)
Debt issuance costs, net			(1.9)	(2.0)
Long-term debt			215.8	155.3
Term loan due November 1, 2021 with interest payable monthly
Financing Arrangements
Total debt			24.0
Maximum borrowing capacity \| CAD	CAD 31
Capital lease obligations
Financing Arrangements
Total debt			2.4	3.3
CDOR \| Minimum
Financing Arrangements
Basis spread on variable rate (as a percent)	1.25%
CDOR \| Maximum
Financing Arrangements
Basis spread on variable rate (as a percent)	2.25%
Prime Rate \| Minimum
Financing Arrangements
Basis spread on variable rate (as a percent)	0.25%
Prime Rate \| Maximum
Financing Arrangements
Basis spread on variable rate (as a percent)	1.25%
Revolving Credit Facility expiring November 1, 2021 with interest payable monthly
Financing Arrangements
Total debt			168.0	131.0
Industrial revenue bond (secured by property, plant and equipment) due August 1, 2018 with interest payable monthly
Financing Arrangements
Total debt			25.0	$ 25.0
Variable rate and fixed rate debt \| Significant other observable inputs (Level 2)
Financing Arrangements
Estimated fair value of long-term debt			$ 219.4
MRO facilities acquired in Quebec and Ontario, Canada owned by Premier Aviation
Financing Arrangements
Number of facilities acquired \| facility	2	2