Note 15 - Derivative Financial Instruments (Details Textual) - USD ($) $ in Millions			12 Months Ended
	May 06, 2016	Sep. 28, 2012	May 31, 2016	Sep. 30, 2015	May 31, 2015	Sep. 30, 2014	Sep. 29, 2012	Aug. 31, 2011
Interest Rate Swap [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate		1.25%
Derivative, Fixed Interest Rate			1.25%
Interest Rate Swap [Member] | London Interbank Offered Rate (LIBOR) [Member] | Effective October 1, 2014 through September 30, 2015 [Member]
Derivative, Average Fixed Interest Rate				1.77%
Interest Rate Swap [Member] | London Interbank Offered Rate (LIBOR) [Member] | Effective October 1, 2015 through September 30, 2016 [Member]
Derivative, Average Fixed Interest Rate			1.91%
Interest Rate Swap [Member] | London Interbank Offered Rate (LIBOR) [Member]
Derivative, Average Fixed Interest Rate						1.67%	1.59%
Interest Rate Swap [Member] | Effective October 1, 2014 through September 30, 2015 [Member]
Derivative, Notional Amount					$ 155.0
Derivative, Amount of Hedged Item				$ 155.0
Interest Rate Swap [Member] | Effective October 1, 2015 through September 30, 2016 [Member]
Derivative, Amount of Hedged Item			$ 70.0
Interest Rate Swap [Member]
Derivative, Notional Amount								$ 320.0
Derivative, Amount of Hedged Item			70.0			$ 240.0
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]
Debt Instrument, Basis Spread on Variable Rate	0.00%
Interest Expense [Member]
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimated Net Amount to be Transferred			$ 0.2