Condensed Consolidated Statements of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Statement of Comprehensive Income [Abstract]    
Net income (loss) $ 4,533 $ (4,181)
Other comprehensive income (loss):    
Foreign currency translation (9,620) (4,093)
Unrealized gain/(loss) on investments, net of tax of $16 and $(14) 30 (26)
Changes in benefit plan accounts, net of tax of $581 and $678 966 1,105
Other comprehensive loss, net of tax (8,624) (3,014)
Comprehensive loss $ (4,091) $ (7,195)