Segment Information (Schedule Of Identifiable Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Assets	$ 7,802,886	$ 4,048,145
Drilling Products And Services [Member]
Segment Reporting Information [Line Items]
Assets	1,086,804	947,679	802,785
Onshore Completion Services [Member]
Segment Reporting Information [Line Items]
Assets	3,223,984	560,246
Production Services [Member]
Segment Reporting Information [Line Items]
Assets	2,185,779	1,140,724	714,140
Subsea And Technical Solutions [Member]
Segment Reporting Information [Line Items]
Assets	1,295,134	1,162,580	1,055,673
Unallocated [Member]
Segment Reporting Information [Line Items]
Assets	11,185	72,472	79,052
Marine [Member]
Segment Reporting Information [Line Items]
Assets		$ 164,444	$ 255,883