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Income Taxes - Tax Effects of Temporary Differences That Give Rise to the Company's Deferred Tax Assets and Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]      
Accrued compensation and benefits $ 1,463 $ 1,808  
Inventory valuation reserves 2,581 2,771  
Benefit plan reserves 7,773 9,468  
Capital tax loss carryforwards 0 2,034  
Net operating loss carryforwards 1,244 788  
Other accrued expenses 2,926 2,480  
Unrealized foreign exchange 743 58  
Gross deferred tax assets 16,730 19,407  
Valuation allowance (1,420) (2,329)  
Net deferred tax assets 15,310 17,078  
Depreciation and other basis differences (5,533) (5,276)  
Intangibles (2,828) (3,571)  
Other (132) (90)  
Deferred tax liabilities (8,493) (8,937)  
Net deferred tax assets 6,817 8,141  
Deferred income tax benefit 1,105 2,927 688
Items of other comprehensive income (loss) (2,692) (1,033)  
Currency translation 263 (254)  
Deferred tax balances from business acquisition 0 (1,036)  
Total change in net deferred tax assets $ (1,324) $ 604