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Other Income (Expense) (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Component of Other Expense, Nonoperating [Line Items]                      
Foreign currency transaction losses                 $ (753) $ (3,216) $ (5,275)
Loss on interest rate swaps                   (153) (1,640)
Gain on transfer of assets under contractual obligations                     1,049
Other                 (49) (246) (782)
Total $ (714) $ (46) $ 260 $ (302) $ (163) $ (1,556) $ (1,682) $ (214) $ (802) $ (3,615) $ (6,648)