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Restructuring - Activity in Restructuring Liability Accounts (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
2012 Restructuring [Member]
Dec. 31, 2012
2012 Restructuring [Member]
One-time employee termination benefits [Member]
Dec. 31, 2012
2012 Restructuring [Member]
Lease/rental terminations [Member]
Dec. 31, 2012
2012 Restructuring [Member]
Relocation, move, other expenses [Member]
Dec. 31, 2013
2013 Restructuring [Member]
Dec. 31, 2013
2013 Restructuring [Member]
One-time employee termination benefits [Member]
Dec. 31, 2013
2013 Restructuring [Member]
Lease/rental terminations [Member]
Dec. 31, 2013
2013 Restructuring [Member]
Fixed asset write-offs, transition travel, other [Member]
Restructuring Cost and Reserve [Line Items]                  
Beginning Balance   $ 8 $ 8                  
Provision-net               5,602 1,152 3,260 1,190
Usage (1,400) (4)       (4) (2,234) (924) (145) (1,165)
Reclass      (4)    4    (13)    13
Ending Balance   $ 4 $ 4       $ 3,368 $ 215 $ 3,115 $ 38