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Commitments And Contingencies And Other Matters (Narrative) (Details) (USD $)
1 Months Ended 1 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended 1 Months Ended
Jun. 30, 2014
Dec. 31, 2013
Sep. 30, 2013
Q7000 [Member]
Jun. 30, 2014
Q7000 [Member]
Jun. 30, 2014
Q5000 [Member]
Mar. 31, 2012
Q5000 [Member]
Shipyard [Member]
Jun. 30, 2014
Q5000 [Member]
Shipyard [Member]
Jun. 30, 2014
Monohull Vessels [Member]
property
Jun. 30, 2014
Topside Equipment [Member]
Jun. 30, 2014
Milestone Payment [Member]
Q5000 [Member]
Shipyard [Member]
Sep. 30, 2013
Contract Signing [Member]
Q7000 [Member]
Jun. 30, 2014
Contract Signing [Member]
Q7000 [Member]
Sep. 30, 2013
Vessel Delivery [Member]
Q7000 [Member]
Commitments And Contingencies [Line Items]                          
Long-term purchase commitment     $ 346,000,000     $ 386,500,000              
Property and equipment 2,072,116,000 1,963,706,000   85,400,000 276,100,000   231,900,000   3,100,000 57,800,000      
Payments to acquire property, plant, and equipment                       $ 69,200,000  
Long-term purchase commitment percentage                     20.00%   80.00%
Number of vessels under construction               2