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Taxes - Additional Information (Detail) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Apr. 01, 2012 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2010 USD ($) | Dec. 31, 2010 JPY (¥) | Dec. 31, 2012 Alternative minimum [Member] USD ($) | Dec. 31, 2012 Foreign Country [Member] USD ($) | Dec. 31, 2012 Research [Member] USD ($) | Dec. 31, 2012 State Research and Experimentation [Member] USD ($) | Dec. 31, 2012 Research and Development tax credit [Member] USD ($)
Tax Credit Carryforward [Line Items] |  |  |  |  |  |  |  |  |  |
Domestic income from continuing operations before taxes |  | $ 36,754,000 | $ 24,836,000 | $ 19,424,000 |  |  |  |  |  |
Foreign income from continuing operations before taxes |  | 49,876,000 | 62,281,000 | 56,679,000 |  |  |  |  |  |
Increase (decrease) in tax expense upon the expiration of the statutes of limitation for certain reserves for income tax uncertainties |  | 441,000 | 808,000 | 105,000 |  |  |  |  |  |
Increase (decrease) in tax expense for the finalization of advanced pricing agreement |  |  | 155,000 |  |  |  |  |  |  |
Increase (decrease) in tax expense for the final true-up of the prior year's tax accrual upon filing the actual tax returns |  | 84,000 | 574,000 | 151,000 |  |  |  |  |  |
Increase (decrease) in tax expense from write down of noncurrent deferred tax asset |  | 101,000 | 201,000 |  |  |  |  |  |  |
Increase (decrease) in interest and penalties |  | 58,000 | 2,000 | 228,000 |  |  |  |  |  |
Increase (decrease) in tax expense of due to the settlement of the competent Authority tax case with Japan |  |  |  | 462,000 |  |  |  |  |  |
Increase (decrease) in tax expense from the receipt of state refund |  |  |  | 124,000 |  |  |  |  |  |
Provision for effective tax rate |  | 21.00% | 20.00% | 19.00% | 19.00% |  |  |  |  |
Effective discrete tax rate |  |  |  | 20.00% | 20.00% |  |  |  |  |
Reduction in tax expense |  |  |  |  |  | 1,668,000 | 3,569,000 |  | 4,510,000 | 555,000
Reserve for income taxes, total |  | 5,216,000 | 5,354,000 |  |  |  |  |  |  |
Reserve for income taxes, current |  |  | 558,000 |  |  |  |  |  |  |
Interest and penalties, gross |  | 1,192,000 | 1,206,000 |  |  |  |  |  |  |
Reserve for income taxes, noncurrent |  | 5,216,000 | 4,796,000 |  |  |  |  |  |  |
Minimum decrease in income tax expense due to release in reserves |  | 1,500,000 |  |  |  |  |  |  |  |
Maximum decrease in income tax expense due to release in reserves |  | 1,800,000 |  |  |  |  |  |  |  |
Tax years open to examination by various taxing authorities |  | 2008 through 2011 |  |  |  |  |  |  |  |
Company's deposit returned with interest |  |  |  | 9,336,000 | 766,257,300 |  |  |  |  |
Tax years covered through Advanced Pricing Agreement |  |  | 2006 through 2011 |  |  |  |  |  |  |
Valuation allowance |  | 1,911,000 |  |  |  |  | 2,457,000 | 546,000 |  |
Alternative minimum tax credits unlimited life and the foreign tax credits |  | Between 2019 and 2022 |  |  |  |  |  |  |  |
Recognized a deferred tax asset |  | 520,000 | 609,000 |  |  |  |  |  |  |
Establishment of Deferred Tax Assets for Capital Loss Carryforwards |  | 373,000 | 373,000 |  |  |  |  |  |  |
Non deductible federal and state liabilities |  | 4,945,000 | 6,244,000 |  |  |  |  |  |  |
Income from expiration of the statute of limitations relating to a tax | 141,000 |  |  |  |  |  |  |  |  |
Income tax paid net |  | 13,551,000 | 18,389,000 | 8,019,000 |  |  |  |  |  |
Amount paid to conclude the Japan competent authority case |  |  |  | $ 2,526,000 |  |  |  |  |  |

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- Definition The amount of the valuation allowance recorded as of the balance sheet date pertaining to the specified deferred tax asset for which an assessment was made that it is more likely than not that all or a portion of such deferred tax asset will not be realized through related deductions on future tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 43 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Valuation Allowance -URI http://asc.fasb.org/extlink&oid=6528051 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant