Quarterly report pursuant to Section 13 or 15(d)

Note 6 - Derivative Instruments and Hedging Strategies (Details Textual)

v3.10.0.1
Note 6 - Derivative Instruments and Hedging Strategies (Details Textual)
€ in Millions, $ in Millions
Oct. 01, 2018
USD ($)
Sep. 30, 2018
USD ($)
Sep. 30, 2018
EUR (€)
Sep. 28, 2018
USD ($)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]        
Derivative Asset, Total [1]      
Interest Rate Swap [Member] | OSV Partners [Member]        
Derivative, Number of Instruments Held, Total   2 2  
Derivative, Notional Amount   $ 29.2    
Interest Rate Swap [Member] | OSV Partners [Member] | Minimum [Member]        
Derivative, Fixed Interest Rate   1.89% 1.89%  
Interest Rate Swap [Member] | OSV Partners [Member] | Maximum [Member]        
Derivative, Fixed Interest Rate   2.27% 2.27%  
Interest Rate Swap [Member] | Falcon Global [Member]        
Derivative, Fixed Interest Rate       2.06%
Derivative, Notional Amount       $ 51.6
Interest Rate Swap [Member] | Falcon Global [Member] | Subsequent Event [Member]        
Derivative Asset, Total $ 1.2      
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]        
Derivative, Number of Instruments Held, Total   2 2  
Derivative, Fixed Interest Rate   0.03% 0.03%  
Derivative, Notional Amount   $ 17.5 € 15  
Derivative Asset, Total [1]      
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | MexMar [Member]        
Derivative, Number of Instruments Held, Total   5 5  
Derivative, Notional Amount   $ 100.5    
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | MexMar [Member] | Minimum [Member]        
Derivative, Fixed Interest Rate   1.71% 1.71%  
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | MexMar [Member] | Maximum [Member]        
Derivative, Fixed Interest Rate   2.10% 2.10%  
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Sea-Cat Crewzer II [Member]        
Derivative, Fixed Interest Rate       1.52%
Derivative, Notional Amount       $ 19.1
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Sea-Cat Crewzer II [Member] | Subsequent Event [Member]        
Derivative Asset, Total 0.2      
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Sea-Cat Crewzer [Member]        
Derivative, Fixed Interest Rate       1.52%
Derivative, Notional Amount       $ 16.9
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Sea-Cat Crewzer [Member] | Subsequent Event [Member]        
Derivative Asset, Total $ 0.2      
[1] Included in other receivables in the accompanying condensed consolidated balance sheets.