Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Carrying Amounts and Fair Value of Long Term Debt (Details)

v3.19.1
Fair Value Measurements - Carrying Amounts and Fair Value of Long Term Debt (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Feb. 28, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Carrying Amount $ 793,752     $ 774,797
Fair Value 659,890     690,360
Paid-in-Kind interest converted to principal 9,507 $ 0    
Amount outstanding 730,518     709,611
Discount 63,234     65,186
Term loan facility        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Carrying Amount 475,000     478,125
Fair Value 467,875     473,344
Revolving Credit Facility        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Carrying Amount 50,915     54,015
Fair Value 50,915     54,015
Convertible senior notes        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Carrying Amount 82,500     82,500
Fair Value $ 33,413     49,064
Stated interest rate 2.75%      
Equity component of convertible debt $ 13,000      
Amount outstanding 82,500      
Other debt        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Carrying Amount 17,380     1,707
Fair Value 17,380     1,707
Equipment Financing        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Other long term debt 8,500      
Second Lien Credit Agreement        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Carrying Amount 167,957     158,450
Fair Value 90,307     $ 112,230
Paid-in-Kind interest converted to principal 9,500      
Penny Warrants | Second Lien Credit Agreement        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Equity component of convertible debt 14,900      
Market Warrants | Second Lien Credit Agreement        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Equity component of convertible debt 9,300      
Wireless Maritime Services        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Payable to related party $ 7,400   $ 7,400