Annual report pursuant to Section 13 and 15(d)

Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Statement of Comprehensive Income (Loss) (Details)

v3.8.0.1
Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Statement of Comprehensive Income (Loss) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Schedule of Condensed Statement of Comprehensive Income [Line Items]      
Net income (loss) $ (118,701) $ (230,814) $ (94,284)
Other comprehensive gain (loss), net of tax:      
Currency translation difference on related borrowings 643 (691) (2,012)
Currency translation difference on foreign currency net investments 2,689 (4,265) 405
Total other comprehensive gain (loss), net of tax: 3,332 (4,956) (1,607)
Comprehensive income (loss) (115,369) (235,770) (95,891)
Comprehensive (income) loss attributable to noncontrolling interest 0 0 4,606
Comprehensive income (loss) attributable to controlling interest (115,369) (235,770) (91,285)
Reportable Legal Entities | Parent      
Schedule of Condensed Statement of Comprehensive Income [Line Items]      
Net income (loss) (118,701) (230,814) (95,073)
Other comprehensive gain (loss), net of tax:      
Currency translation difference on related borrowings 0 0 0
Currency translation difference on foreign currency net investments 0 0 0
Total other comprehensive gain (loss), net of tax: 0 0 0
Comprehensive income (loss) (118,701) (230,814) (95,073)
Comprehensive (income) loss attributable to noncontrolling interest     0
Comprehensive income (loss) attributable to controlling interest     (95,073)
Reportable Legal Entities | Guarantor      
Schedule of Condensed Statement of Comprehensive Income [Line Items]      
Net income (loss) (1,611) (49,625) (13,875)
Other comprehensive gain (loss), net of tax:      
Currency translation difference on related borrowings 0 0 0
Currency translation difference on foreign currency net investments 0 0 0
Total other comprehensive gain (loss), net of tax: 0 0 0
Comprehensive income (loss) (1,611) (49,625) (13,875)
Comprehensive (income) loss attributable to noncontrolling interest     0
Comprehensive income (loss) attributable to controlling interest     (13,875)
Reportable Legal Entities | Non-Guarantor      
Schedule of Condensed Statement of Comprehensive Income [Line Items]      
Net income (loss) (39,141) (44,844) (21,967)
Other comprehensive gain (loss), net of tax:      
Currency translation difference on related borrowings 643 (691) (2,012)
Currency translation difference on foreign currency net investments 2,689 (4,265) 405
Total other comprehensive gain (loss), net of tax: 3,332 (4,956) (1,607)
Comprehensive income (loss) (35,809) (49,800) (23,574)
Comprehensive (income) loss attributable to noncontrolling interest     4,606
Comprehensive income (loss) attributable to controlling interest     (18,968)
Eliminations      
Schedule of Condensed Statement of Comprehensive Income [Line Items]      
Net income (loss) 40,752 94,469 36,631
Other comprehensive gain (loss), net of tax:      
Currency translation difference on related borrowings 0 0 0
Currency translation difference on foreign currency net investments 0 0 0
Total other comprehensive gain (loss), net of tax: 0 0 0
Comprehensive income (loss) $ 40,752 $ 94,469 36,631
Comprehensive (income) loss attributable to noncontrolling interest     0
Comprehensive income (loss) attributable to controlling interest     $ 36,631