Company Overview (Narrative) (Details) (USD $)	3 Months Ended	6 Months Ended		10 Months Ended		3 Months Ended	6 Months Ended			1 Months Ended	10 Months Ended		9 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Jul. 31, 2013	Dec. 31, 2012	Jun. 30, 2013 Credit Agreement [Member]	Jun. 30, 2013 Credit Agreement [Member]	Jun. 30, 2013 Spoolbase Facility [Member]	Jul. 24, 2013 Spoolbase Facility [Member]	Jul. 24, 2013 Express Vessel [Member]	Jul. 31, 2013 Express Vessel [Member]	Jun. 30, 2013 Express Vessel [Member]	Jun. 30, 2013 Caesar Vessel [Member]	May 31, 2013 Caesar Vessel [Member]	Jun. 30, 2013 Helix [Member]	Jun. 30, 2012 Helix [Member]
Future sales proceeds payable over 3.5 years								$ 45,000,000
Proceeds from Divestiture of Businesses	624,000,000
Proceeds from sale of assets		108,250,000		238,300,000							100,000,000		138,300,000
Deposit liability current	20,000,000	20,000,000			50,000,000				5,000,000			20,000,000		30,000,000
Gain on sale or acquisition of assets, net	(1,085,000)	(1,085,000)								15,500,000
Repayments of Debt		$ 520,814,000	$ 358,604,000			$ 80,100,000	$ 80,100,000								$ 518,285,000	$ 356,195,000