Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Details)

v3.7.0.1
Long-Term Debt (Details)
$ in Millions
6 Months Ended
Jun. 30, 2017
USD ($)
equipment
Mar. 31, 2017
USD ($)
Debt Instrument [Line Items]    
Letters of Credit Outstanding, Amount $ 16.7  
Guarantor Obligations, Maximum Exposure, Undiscounted $ 0.9  
Three Point Seven Five Percentage Convertible Notes [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.75%  
Embedded Derivative, Fair Value of Embedded Derivative Liability $ 27.3  
Debt Instrument, Interest Rate, Effective Percentage 7.95%  
Sea-Cat Crewzer II [Member]    
Debt Instrument [Line Items]    
Long-term Debt $ 22.1  
Debt Instrument, Final Baloon Payment 17.3  
Sea Cat Crewzer [Member]    
Debt Instrument [Line Items]    
Long-term Debt 19.6  
Debt Instrument, Final Baloon Payment 15.3  
Other Debt Obligations [Member]    
Debt Instrument [Line Items]    
Repayments of long-term debt (2.5)  
Line of Credit Facility, Current Borrowing Capacity 4.6  
Proceeds from Issuance of Debt $ 3.4  
Minimum [Member] | Sea-Cat Crewzer II [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Basis Spread on Variable Rate 2.10%  
Minimum [Member] | Sea Cat Crewzer [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Basis Spread on Variable Rate 2.10%  
Maximum [Member] | Sea-Cat Crewzer II [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 1.52%  
Debt Instrument, Interest Rate, Effective Percentage 4.27%  
Debt Instrument, Basis Spread on Variable Rate 2.75%  
Maximum [Member] | Sea Cat Crewzer [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 1.52%  
Debt Instrument, Interest Rate, Effective Percentage 4.27%  
Debt Instrument, Basis Spread on Variable Rate 2.75%  
Falcon Global [Member]    
Debt Instrument [Line Items]    
Number of Equipment Operated | equipment 2  
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate 3.97%  
Long-term Debt $ 57.8 $ 58.3
Debt Issuance Costs, Noncurrent, Net 1.0  
Advances to Affiliate 14.5  
Falcon Global [Member] | Tranche A [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Unused Borrowing Capacity, Amount 62.5  
Repayments of long-term debt (1.5)  
Falcon Global [Member] | Tranche B [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Unused Borrowing Capacity, Amount $ 18.0  
Falcon Global [Member] | London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Basis Spread on Variable Rate 2.50%  
Falcon Global [Member] | London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Basis Spread on Variable Rate 2.90%