Quarterly report pursuant to Section 13 or 15(d)

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

v2.4.0.8
Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements Parent, Guarantor, Non-Guarantor Unaudited Consolidating Condensed Financial Statements - Statement of Comprehensive Income (Loss) (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Schedule of Condensed Statement of Comprehensive Income [Line Items]        
Net income $ 12,877 $ 8,118 $ 16,322 $ 17,064
Currency translation difference on related borrowings (1,780) (577) (2,248) (1,542)
Currency translation difference on foreign currency net investments 615 2,098 1,126 2,499
Total other comprehensive income (loss), net of tax: (1,165) 1,521 (1,122) 957
Comprehensive income 11,712 9,639 15,200 18,021
Comprehensive (income) attributable to noncontrolling interest (289) (53) (523) (83)
Comprehensive income attributable to controlling interest 11,423 9,586 14,677 17,938
Parent [Member]
        
Schedule of Condensed Statement of Comprehensive Income [Line Items]        
Net income 12,566 7,970 15,698 16,843
Currency translation difference on related borrowings 0 0 0 0
Currency translation difference on foreign currency net investments     0 0
Total other comprehensive income (loss), net of tax: 0 0 0 0
Comprehensive income 12,566 7,970 15,698 16,843
Comprehensive (income) attributable to noncontrolling interest 0 0 0 0
Comprehensive income attributable to controlling interest 12,566 7,970 15,698 16,843
Guarantor [Member]
        
Schedule of Condensed Statement of Comprehensive Income [Line Items]        
Net income 19,980 10,817 54,169 27,612
Currency translation difference on related borrowings 0 0 0 0
Currency translation difference on foreign currency net investments     0 0
Total other comprehensive income (loss), net of tax: 0 0 0 0
Comprehensive income 19,980 10,817 54,169 27,612
Comprehensive (income) attributable to noncontrolling interest 0 0 0 0
Comprehensive income attributable to controlling interest 19,980 10,817 54,169 27,612
Non-Guarantor [Member]
        
Schedule of Condensed Statement of Comprehensive Income [Line Items]        
Net income (227) 11,653 (2,954) 8,939
Currency translation difference on related borrowings (1,780) (577) (2,248) (1,542)
Currency translation difference on foreign currency net investments 615 2,098 1,126 2,499
Total other comprehensive income (loss), net of tax: (1,165) 1,521 (1,122) 957
Comprehensive income (1,392) 13,174 (4,076) 9,896
Comprehensive (income) attributable to noncontrolling interest (289) (53) (523) (83)
Comprehensive income attributable to controlling interest (1,681) 13,121 (4,599) 9,813
Eliminations [Member]
        
Schedule of Condensed Statement of Comprehensive Income [Line Items]        
Net income (19,442) (22,322) (50,591) (36,330)
Currency translation difference on related borrowings 0 0 0 0
Currency translation difference on foreign currency net investments     0 0
Total other comprehensive income (loss), net of tax: 0 0 0 0
Comprehensive income (19,442) (22,322) (50,591) (36,330)
Comprehensive (income) attributable to noncontrolling interest 0 0 0 0
Comprehensive income attributable to controlling interest $ (19,442) $ (22,322) $ (50,591) $ (36,330)