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

No definition available.

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- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

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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

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

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- Definition

Date the debt instrument was issued, in CCYY-MM-DD format.

+ References

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- Definition

Amount of the required periodic payments applied to principal.

+ References

+ Details

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- Definition

For an unclassified balance sheet, the carrying amount (net of accumulated amortization) as of the balance sheet date of capitalized costs associated with the issuance of debt instruments (for example, legal, accounting, underwriting, printing, and registration costs) that will be charged against earnings over the life of the debt instruments to which such costs pertain.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-SubTopic 30
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

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

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- Definition

Fair value of the amount outstanding under the credit facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
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- Definition

The effective interest rate at the end of the reporting period.

+ References

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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.

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Long-term Debt (Narrative) (Details) - USD ($) $ in Thousands			3 Months Ended	6 Months Ended
	Apr. 04, 2016	Oct. 01, 2015	Dec. 31, 2015	Mar. 31, 2016	Sep. 30, 2015	Sep. 30, 2014
Balance of unamortized debt issuance costs				$ 4,921	$ 5,521
2008 Note Purchase Agreement [Member]
Issuance Date				Oct. 01, 2008
Series C Notes [Member]
Principal Payment Amount		$ 50,000
2009 Note Purchase Agreement [Member]
Issuance Date				Apr. 01, 2009
Series E Notes [Member]
Principal Payment Amount	$ 57,000
2013 Note Purchase Agreement [Member]
Issuance Date				Oct. 01, 2013
Face Amount				$ 250,000
Series J Notes [Member]
Variable Rate Basis				LIBOR
Variable interest rate				1.87%
First Closing Notes [Member]
Issuance Date				Oct. 01, 2013
Second Closing Notes [Member]
Issuance Date			Nov. 15, 2013	Nov. 15, 2013
Other Foreign Short-term Borrowings [Member]
Outstanding borrowings				$ 0
Chinese Credit Facility [Member]
Line of Credit Facility, Expiration Date				Sep. 01, 2016
Line of Credit Facility, Maximum Borrowing Capacity				$ 22,700		$ 22,700
Outstanding borrowings				$ 0
Chinese Credit Facility, RMB Denominated Loan [Member]
Variable Rate Basis				interest at the prevailing interest rate offered by the People's Bank of China on the date of borrowing, plus a margin equal to 15% of that prevailing rate
Chinese Credit Facility, USD Denominated Loan [Member]
Variable Rate Basis				interest at the lender's cost of borrowing rate at the date of borrowing, plus 3%
Revolving Credit Agreement [Member]
Variable Rate Basis				LIBOR
Line of Credit Facility, Expiration Date				Apr. 01, 2020
Line of Credit Facility, Maximum Borrowing Capacity				$ 1,000,000
Outstanding borrowings				$ 267,000	$ 350,000
Credit facility effective interest rate on outstanding borrowing				1.68%	1.44%
Revolving Credit Agreement [Member] \| Minimum [Member]
Basis Spread On Variable Rate				0.85%
Revolving Credit Agreement [Member] \| Maximum [Member]
Basis Spread On Variable Rate				1.65%