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Pension Benefits - Components of Other Comprehensive Loss Relating to Plans (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Other comprehensive income (loss):      
Net (loss) gain arising during the period $ (3,930) $ 6,143 $ (12,052)
Amortization of net actuarial loss (gain) 1,484 1,979 319
Plan settlement 973    
Total (loss) income before income taxes $ (1,473) $ 8,122 $ (11,733)