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Accumulated Other Comprehensive Income (Tables)
 12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Changes in the balances of each component of accumulated other comprehensive income
Changes in the balances of each component of accumulated other comprehensive income for the years ended December 31, 2017, 2016 and 2015 are as follows:
 
 
Accumulated
loss on
foreign currency
translation
 
Accumulated
loss
on interest
rate swaps
 
Total
 
 
(In thousands)
BALANCE, December 31, 2014
 
$
(64,075
)
 
$
(17,909
)
 
$
(81,984
)
Other comprehensive loss, net of tax
 
(54,457
)
 
(1,543
)
 
(56,000
)
BALANCE, December 31, 2015
 
(118,532
)
 
(19,452
)
 
(137,984
)
Other comprehensive (loss) income, net of tax
 
(19,081
)
 
10,121

 
(8,960
)
BALANCE, December 31, 2016
 
(137,613
)
 
(9,331
)
 
(146,944
)
Other comprehensive income, net of tax
 
15,061

 
8,657

 
23,718

BALANCE, December 31, 2017
 
$
(122,552
)
 
$
(674
)
 
$
(123,226
)