Commitments And Contingencies (Lease Commitments) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
Total lease commitments	$ 399,483
2013	86,357
2014	91,019
2015	89,775
2016	63,308
2017	41,341
Thereafter	27,683
ROVs And Vessels [Member]
Total lease commitments	361,618
2013	84,409
2014	87,942
2015	86,155
2016	60,019
2017	38,188
Thereafter	4,905
Facilities And Other [Member]
Total lease commitments	37,865
2013	1,948
2014	3,077
2015	3,620
2016	3,289
2017	3,153
Thereafter	$ 22,778