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Restructuring Charges Included in Accrued Expenses in Accompanying Consolidated Balance Sheets (Detail) (Employee Severance Benefits, USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Employee Severance Benefits
 
Restructuring Cost and Reserve [Line Items]  
Beginning balance $ 135
Restructuring charges   
Cash payments (120)
Ending balance $ 15