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Defined Benefit Plan Expected Future Benefit Payments (Detail) (Pension Benefits, USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Pension Benefits
 
Defined Benefit Plan Disclosure [Line Items]  
2014 $ 370
2015 423
2016 456
2017 486
2018 509
2019 - 2023 2,631
Total $ 4,875