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Condensed consolidated guarantor financial information - additional information (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 28, 2014
Dec. 31, 2013
Sep. 29, 2013
Jun. 26, 2011
6.875% Senior Subordinated Notes due 2019
Condensed Financial Statements Captions [Line Items]        
6.875% Senior Subordinated Notes due 2019       $ 250,000
Debt instrument, stated interest rate 3.875% 3.875% 3.875% 6.875%
Ownership percentage of subsidiaries 100.00%