Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidating Financial Information (Condensed Consolidating Statements of Comprehensive Income (Loss)) (Details)

v3.8.0.1
Condensed Consolidating Financial Information (Condensed Consolidating Statements of Comprehensive Income (Loss)) (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Condensed Financial Statements, Captions [Line Items]        
Net income (loss) $ 18,235 $ (157,296) $ 278,626 $ (739,339)
Foreign currency translation adjustment [1] 6,832 (4,013) 12,719 4,361
Other comprehensive income (loss) 6,832 (4,013) 12,719 4,361
Comprehensive income (loss) 25,067 (161,309) 291,345 (734,978)
Reportable Legal Entities | Parent        
Condensed Financial Statements, Captions [Line Items]        
Net income (loss) 18,235 (157,296) 278,626 (739,339)
Foreign currency translation adjustment 6,832 (4,013) 12,719 4,361
Other comprehensive income (loss) 6,832 (4,013) 12,719 4,361
Comprehensive income (loss) 25,067 (161,309) 291,345 (734,978)
Reportable Legal Entities | Guarantors        
Condensed Financial Statements, Captions [Line Items]        
Net income (loss) 56,490 559 156,231 574
Foreign currency translation adjustment 158 0 232 0
Other comprehensive income (loss) 158 0 232 0
Comprehensive income (loss) 56,648 559 156,463 574
Reportable Legal Entities | Non-Guarantor        
Condensed Financial Statements, Captions [Line Items]        
Net income (loss) (297) (364) (872) (24,814)
Foreign currency translation adjustment 6,674 (1,417) 12,487 8,252
Other comprehensive income (loss) 6,674 (1,417) 12,487 8,252
Comprehensive income (loss) 6,377 (1,781) 11,615 (16,562)
Eliminations        
Condensed Financial Statements, Captions [Line Items]        
Net income (loss) (56,193) (195) (155,359) 24,240
Foreign currency translation adjustment (6,832) 1,417 (12,719) (8,252)
Other comprehensive income (loss) (6,832) 1,417 (12,719) (8,252)
Comprehensive income (loss) $ (63,025) $ 1,222 $ (168,078) $ 15,988
[1] Net of $2.8 million in taxes for each of the three and nine months ended September 30, 2016.