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Schedule of Restructuring Accruals Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Restructuring Cost and Reserve [Line Items]    
Beginning Balance $ 10,887  
Restructuring expenses    (4,938)
Payments/utilization (6,682)  
Ending Balance $ 4,205