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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.

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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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