Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Fair Value Measurements - Carrying Amounts and Fair Value of Long Term Debt (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2019
Jun. 30, 2018
Feb. 28, 2019
Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Carrying Amount $ 791,469 $ 791,469     $ 774,797
Fair Value 665,018 665,018     690,360
Paid-in-Kind interest converted to principal   9,507 $ 0    
Amount outstanding 730,286 730,286     709,611
Discount 61,183 61,183     65,186
Finance lease liability 19,113 19,113      
Term loan facility          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Carrying Amount 468,750 468,750     478,125
Fair Value 448,828 448,828     473,344
Revolving Credit Facility          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Carrying Amount 42,415 42,415     54,015
Fair Value 42,415 42,415     54,015
Convertible senior notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Carrying Amount 82,500 82,500     82,500
Fair Value $ 37,125 $ 37,125     49,064
Stated interest rate 2.75% 2.75%      
Equity component of convertible debt $ 13,000 $ 13,000      
Amount outstanding 82,500 82,500      
Other debt          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Carrying Amount 29,847 29,847     1,707
Fair Value 29,847 29,847     1,707
Equipment Financing          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Other long term debt 8,500 8,500      
Second Lien Credit Agreement          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Carrying Amount 167,957 167,957     158,450
Fair Value 106,803 106,803     $ 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 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 9,300      
Wireless Maritime Services          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Payable to related party $ 3,100 $ 3,100   $ 7,400