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Property and Business Interruption Insurance Claims and Recoveries - Additional Information (Detail) (USD $)
 3 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended
Mar. 31, 2014
Jan. 31, 2014
Cherokee Facility [Member]
Jan. 31, 2014
Cherokee Facility [Member]
Property Insurance [Member]
Mar. 31, 2014
Cherokee Facility [Member]
Property Insurance [Member]
Mar. 31, 2014
Cherokee Facility [Member]
Business Interruption Insurance [Member]
Mar. 31, 2013
Cherokee Facility [Member]
Business Interruption Insurance [Member]
Dec. 31, 2013
Cherokee Facility [Member]
Business Interruption Insurance [Member]
Jan. 31, 2014
Cherokee Facility [Member]
Business Interruption Insurance [Member]
Cost of sales [Member]
Mar. 31, 2013
Cherokee Facility [Member]
Business Interruption Insurance [Member]
Cost of sales [Member]
Property And Or Business Interruption Insurance Claims [Line Items]                  
Deductible property damage under insurance       $ 2,500,000          
Waiting period for business interruption coverage         30 days        
Insurance claim recoverable costs       1,900,000         10,100,000
Insurance recoveries in excess of recoverable costs not recognized           4,900,000      
Approved insurance payments   43,500,000 7,000,000         21,500,000  
Approved insurance payments received   28,500,000              
Approved insurance payments received prior to conclusion           15,000,000      
Property insurance recoveries in excess of losses incurred 5,147,000     5,100,000          
Deferred gain on insurance recovery             $ 1,400,000