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Accumulated other comprehensive income/(loss)
 12 Months Ended
Dec. 31, 2012
Equity [Abstract]  
Other comprehensive income/(loss)
Accumulated other comprehensive loss
 
The accumulated balances for each component of other comprehensive income/(loss) are as follows:
 
 
 
2012
 
2011
December 31,
 
$’000
 
$’000
 
 
 
 
 
Foreign currency translation adjustments, net of tax (benefit) of $(520) and $(477)
 
(67,135
)
 
(52,611
)
Derivative financial instruments, net of tax (benefit) of $(2,337) and $(970)
 
(5,976
)
 
(6,440
)
Pension liability, net of tax provision of $2,337 and $2,161
 
(13,270
)
 
(13,238
)
 
 
 
 
 
 
 
(86,381
)
 
(72,289
)