Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 26, 2014 U.S. Customs And Border Protection [Member] item
Commitments And Contingencies [Line Items]
Outstanding letters of credit	$ 9.5
Number of affiliates that allegedly failed to properly report the importation of spare parts consumed by vessels		2
Amount of proposed duty		2.1
Amount of proposed penalty on assessment		$ 8.4