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ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME
 12 Months Ended
Dec. 31, 2018
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]  
ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME
ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME
 
Accumulated other comprehensive (loss) income consists of the following at the dates indicated (in thousands):
 
December 31,
 
2018
 
2017
Unrealized (losses) gains on derivative instruments
$
(490
)
 
$
29,530

Net loss on settlement of interest rate swaps, net of amortization
(38,699
)
 
(47,924
)
Unrecognized loss on benefit plans
(872
)
 
(2,617
)
Other comprehensive income from equity method investments
—

 
49,642

Total accumulated other comprehensive (loss) income
$
(40,061
)
 
$
28,631