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Estimated Annual Amortization Expense Related to Intangible Assets Subject to Amortization (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]  
2014 $ 9,188
2015 9,053
2016 8,882
2017 8,362
2018 $ 7,523