Financial Instruments - Additional Information (Details) - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2016	Mar. 28, 2013
Derivative [Line Items]
Derivative Amortizes Amount	$ 2.8
Derivative, Notional Amount		$ 213.8
Interest Rate Swap Settlement By Cash	2.3
Amortization Of Interest Rate Swap To Interest Expense	$ 2.3
Interest Rate Swap Fixed Rate Of 1.38 %
Derivative [Line Items]
Interest rate swap, interest rate	1.38%
Derivative, Maturity Date	Mar. 31, 2017
Derivative Amortization Frequency	quarter