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Other Expense, Net (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Other Expense, Net    
West 57th Street building income $ (456) $ (555)
West 57th Street building expense 1,850 1,805
Foreign exchange gain, net (716) (619)
Miscellaneous, net (277) (277)
Other expense, net $ 401 $ 354