Commitments And Contingencies (Details) $ in Millions	Jan. 06, 2015 USD ($)	Jun. 26, 2014 USD ($) item
Commitments And Contingencies [Line Items]
Deposit and interest collected	$ 4.2
Deposit reclassified to current receivable	3.9
Interest accrued on receivable from customer	$ 0.3
U.S. Customs And Border Protection [Member]
Commitments And Contingencies [Line Items]
Number of affiliates that allegedly failed to properly report the importation of spare parts consumed by vessels | item		2
Amount of proposed duty		$ 2.1
Amount of proposed penalty on assessment		$ 8.3