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Employee Severance Expenses by Segment (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]      
Expenses incurred $ 14,017 $ 1,877 $ 180
TCA
     
Restructuring Cost and Reserve [Line Items]      
Expenses incurred $ 14,017 $ 1,877