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Debt - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Debt Instrument [Line Items]    
Total debt $ 317,013,000 $ 331,354,000 [1]
Revolving credit agreement $ 125,000,000  
Line of credit facility, Minimum maturity period 1 day  
Line of credit facility, Maximum maturity period 180 days  
Debt matures in 2017 $ 28,154,000  
Debt matures in 2018 20,714,000  
Debt matures in 2019 29,286,000  
Debt matures in 2020 29,286,000  
Debt matures in 2021 43,572,000  
Debt matures after 2021 167,142,000  
Amount of repayments of long-term debt due in next year 20,714,000  
Amount of repayments of foreign subsidiaries short-term debt due in next year $ 7,440,000  
Minimum [Member]    
Debt Instrument [Line Items]    
Facility fee percentage 0.15%  
Minimum [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Spread rate 0.975%  
Minimum [Member] | Prime Rate [Member]    
Debt Instrument [Line Items]    
Spread rate 0.00%  
Maximum [Member]    
Debt Instrument [Line Items]    
Facility fee percentage 0.35%  
Maximum [Member] | LIBOR [Member]    
Debt Instrument [Line Items]    
Spread rate 1.525%  
Maximum [Member] | Prime Rate [Member]    
Debt Instrument [Line Items]    
Spread rate 0.525%  
Unsecured Private Placement Notes [Member]    
Debt Instrument [Line Items]    
Total debt $ 310,714,000  
Unsecured Private Placement Notes [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Debt instrument interest rate percentage 3.86%  
Maturity Dates 12 years  
Unsecured Private Placement Notes [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Debt instrument interest rate percentage 5.88%  
Maturity Dates 13 years  
Multi currency revolving credit agreement [Member]    
Debt Instrument [Line Items]    
Revolving credit agreement $ 125,000,000  
Credit agreement secured date Jul. 10, 2019  
Debt Outstanding $ 0  
Letters of Credit Outstanding 4,802,000  
Unused Revolving credit 120,198,000  
Unrestricted retained earnings 157,606,000 119,891,000
Debt of foreign subsidiaries Unsecured bank debt and Term Loan, foreign currency [Member]    
Debt Instrument [Line Items]    
Total debt 432,000  
Debt of foreign subsidiaries Secured bank debt, foreign currency [Member]    
Debt Instrument [Line Items]    
Total debt $ 7,008,000 $ 1,947,000 [1]
[1] Certain balances have been reclassified from those originally presented at December 31, 2015, due to the Company’s January 1, 2016, adoption of the new U.S. GAAP guidance regarding the classification of debt issuance costs. See Note 1 for additional information regarding ASU No. 2015-3.