Quarterly report pursuant to Section 13 or 15(d)

Noncontrolling Interests in Subsidiaries (Details)

v3.19.1
Noncontrolling Interests in Subsidiaries (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Noncontrolling Interests in Subsidiaries [Line Items]      
Noncontrolling interests in subsidiaries $ 164,703   $ 149,688
Net Income 13,068 $ 5,558  
Net income attributable to noncontrolling interest $ 5,335 4,917  
Sea-Vista | Ocean Services      
Noncontrolling Interests in Subsidiaries [Line Items]      
Noncontrolling interest, ownership percentage by noncontrolling owners 49.00%    
Noncontrolling interests in subsidiaries $ 163,828   148,665
Other Inland River Services Noncontrolling Interests | Inland Services      
Noncontrolling Interests in Subsidiaries [Line Items]      
Noncontrolling interests in subsidiaries $ 870   862
Other Inland River Services Noncontrolling Interests | Minimum | Inland Services      
Noncontrolling Interests in Subsidiaries [Line Items]      
Noncontrolling interest, ownership percentage by noncontrolling owners 3.00%    
Other Inland River Services Noncontrolling Interests | Maximum | Inland Services      
Noncontrolling Interests in Subsidiaries [Line Items]      
Noncontrolling interest, ownership percentage by noncontrolling owners 51.80%    
Other Noncontrolling Interests | Other Segments      
Noncontrolling Interests in Subsidiaries [Line Items]      
Noncontrolling interest, ownership percentage by noncontrolling owners 5.00%    
Noncontrolling interests in subsidiaries $ 5   $ 161
Sea-Vista | Ocean Services      
Noncontrolling Interests in Subsidiaries [Line Items]      
Assets, net 334,300    
Net Income 10,900 10,000  
Net income attributable to noncontrolling interest $ 5,300 $ 4,900