Noncontrolling Interests in Subsidiaries Noncontrolling Interests (Tables)

12 Months Ended

Dec. 31, 2017

Noncontrolling Interest [Abstract]

Redeemable Noncontrolling Interest [Table Text Block]

Noncontrolling interests in the Company’s consolidated subsidiaries as of December 31 were as follows (in thousands):

	Noncontrolling Interests				2017		2016
Ocean Services:
SEA-Vista	49%				128,550		106,054
Inland Services:
Other	3.0	%	–	51.8%	977		980
Other	5.0%				151		152
Discontinued Operations	1.8	%	–	30.0%	—		28,190
					$	129,678	$	135,376