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Restructuring related costs included in Selling, General & Administrative expenses on Consolidated Statements of Income (Detail) (USD $)
In Thousands, unless otherwise specified
6 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]    
Severance and related costs $ 9,660 $ 11,500
Asset impairment and other restructuring costs 710 1,500
Total restructuring costs $ 10,370 $ 13,000