Business Segment Information (Intercompany Segment Gross Profit (Loss)) (Details) (Intercompany Elimination [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Gross profit (loss) with other operating segments of same entity	$ 3,360	$ 7,878	$ (93)
Well Intervention [Member]
Segment Reporting Information [Line Items]
Gross profit (loss) with other operating segments of same entity	(141)	6,203	(223)
Robotics [Member]
Segment Reporting Information [Line Items]
Gross profit (loss) with other operating segments of same entity	3,518	180	213
Subsea Construction [Member]
Segment Reporting Information [Line Items]
Gross profit (loss) with other operating segments of same entity	158	1,670	114
Production Facilities [Member]
Segment Reporting Information [Line Items]
Gross profit (loss) with other operating segments of same entity	$ (175)	$ (175)	$ (197)