Annual report pursuant to Section 13 and 15(d)

ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Details)

v2.4.1.9
ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Components of accumulated other comprehensive income (loss)        
Balance at the beginning of the period $ (31,771)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax $ (56,967)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax    
Change during the period        
Before-tax amount (51,655)us-gaap_OtherComprehensiveIncomeLossBeforeTax 40,957us-gaap_OtherComprehensiveIncomeLossBeforeTax    
Tax benefit/(expense) 17,938us-gaap_OtherComprehensiveIncomeLossTax (15,761)us-gaap_OtherComprehensiveIncomeLossTax    
Other comprehensive loss (33,717)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent 25,196us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent (8,877)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent  
Balance at the end of the period (65,488)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (31,771)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax (56,967)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax  
Pension Liability Adjustment [Member]        
Components of accumulated other comprehensive income (loss)        
Balance at the beginning of the period (34,400)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
(62,502)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
  (52,969)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Change during the period        
Before-tax amount (41,721)us-gaap_OtherComprehensiveIncomeLossBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
45,677us-gaap_OtherComprehensiveIncomeLossBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
   
Tax benefit/(expense) 16,146us-gaap_OtherComprehensiveIncomeLossTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
(17,575)us-gaap_OtherComprehensiveIncomeLossTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
   
Other comprehensive loss (25,575)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
28,102us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
   
Balance at the end of the period (59,975)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
(34,400)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
  (52,969)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember
Foreign Currency Translation [Member]        
Components of accumulated other comprehensive income (loss)        
Balance at the beginning of the period 2,629us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
5,535us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
  4,879us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
Change during the period        
Before-tax amount (9,934)us-gaap_OtherComprehensiveIncomeLossBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
(4,720)us-gaap_OtherComprehensiveIncomeLossBeforeTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
   
Tax benefit/(expense) 1,792us-gaap_OtherComprehensiveIncomeLossTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
1,814us-gaap_OtherComprehensiveIncomeLossTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
   
Other comprehensive loss (8,142)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
(2,906)us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
   
Balance at the end of the period $ (5,513)us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
$ 2,629us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember
  $ 4,879us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_AccumulatedTranslationAdjustmentMember