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ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)
12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)

18.          ACCUMULATED OTHER COMPREHENSIVE INCOME/(LOSS)

Accumulated other comprehensive income/ (loss) consist of the following (in thousands):

   Pension
Liability
Adjustment
   Foreign
Currency
Translation
   Interest
Rate Swaps
   Total 
Balance at December 31, 2016  $(49,200)  $(20,875)  $   $(70,075)
Change during 2017:                    
Before-tax amount   18,980    9,960        28,940 
Tax expense   (4,821)           (4,821)
Other comprehensive earnings/(loss)   14,159    9,960        24,119 
Balance at December 31, 2017   (35,041)   (10,915)       (45,956)
Change during 2018:                    
Before-tax amount   (14,812)   (14,072)       (28,884)
Tax expense   3,762             3,762 
Other comprehensive earnings/(loss)   (11,050)   (14,072)       (25,122)
Balance at December 31, 2018   (46,091)   (24,987)       (71,078)
Change during 2019:                    
Before-tax amount   75,449    4,350    (277)   79,552 
Tax expense   (29,553)           (29,553)
Other comprehensive earnings/(loss)   45,896    4,350    (277)   49,969 
Balance at December 31, 2019  $(195)  $(20,637)  $(277)  $(21,109)