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CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME [Parenthetical] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Statement of Comprehensive Income [Abstract]      
Foreign currency translation, tax $ 751 $ 1,885 $ (3,634)
Unrealized gain (loss) on hedging activities, tax 19,349 4,141 404
Changes in unrecognized pension and other post-retirement benefits cost, tax 6,373 (20,117) 575
Net pension and other postretirement benefit cost, tax $ 3,859 $ 2,063 $ 715