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Accumulated Other Comprehensive Income
 12 Months Ended
May. 31, 2015
AOCI Including Portion Attributable to Noncontrolling Interest [Abstract]  
Accumulated Other Comprehensive Income
ACCUMULATED OTHER COMPREHENSIVE LOSS

The changes in the accumulated balances for each component of other comprehensive loss were as follows for the years ended May 31, 2015, 2014 and 2013:
 
Foreign Currency Translation
 
Unrealized Losses on Hedging Activities
 
Defined Benefit Pension Plans
 
Accumulated Other Comprehensive Loss
 
 
 
 
 
 
 
 
 
(in thousands)
Balance at May 31, 2012
$
(24,951
)
 
$
—

 
$
(5,049
)
 
$
(30,000
)
Other comprehensive income, net of income tax
13,421

 
—

 
1,517

 
14,938

Balance at May 31, 2013
(11,530
)
 
—

 
(3,532
)
 
(15,062
)
Other comprehensive income, net of income tax
13,113

 
—

 
173

 
13,286

Balance at May 31, 2014
1,583

 
—

 
(3,359
)
 
(1,776
)
Other comprehensive loss, net of income tax
(179,892
)
 
(3,874
)
 
(450
)
 
(184,216
)
Balance at May 31, 2015
$
(178,309
)
 
$
(3,874
)
 
$
(3,809
)
 
$
(185,992
)


Other comprehensive income (loss) attributable to noncontrolling interest, which relates only to foreign currency translation, was $(28.6) million, $7.1 million and $7.2 million for the years ended May 31, 2015, 2014 and 2013, respectively.