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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Income Statement [Abstract]        
Tax provision on defined benefit pension plans $ 12 $ 25 $ (25) $ (51)
Tax provision on loss on derivative instrument classified as a cash flow hedge $ 3 $ 16 $ 9 $ 77