Commitments and Contingencies (Details) - USD ($) $ in Millions	Dec. 29, 2016	Sep. 30, 2015	Aug. 20, 2015	May 02, 2012
Loss Contingencies [Line Items]
Litigation amount	$ 4.7
Nui Phao Mining Company
Loss Contingencies [Line Items]
Damages sought		$ 167.0
Judicial Council Of California - Unpaid Fees
Loss Contingencies [Line Items]
Litigation amount				$ 4.7
Litigation contract amount			$ 4.7
Judicial Council Of California, Disgorged Fees
Loss Contingencies [Line Items]
Litigation amount				$ 18.3
Litigation contract amount			$ 18.3