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Segment Reporting - Additional Information (Detail)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]      
Number of reportable segments 4    
Sales [Member]
     
Segment Reporting Information [Line Items]      
Revenues from customers 10.00% 10.00% 10.00%
Sales [Member] | Foreign country customers [Member]
     
Segment Reporting Information [Line Items]      
Revenues from customers 7.00% 9.00% 8.00%