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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Fair value adjustment, tax $ 1 $ 9 $ 160
Net (loss) income arising from retirement benefit obligations, tax 211 (589) 241
Amortization of loss included in net income, tax $ 53 $ 19 $ 36