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Income Taxes - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended |  |  |  |  | 12 Months Ended |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 | Dec. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2013 State and Local Jurisdiction | Dec. 31, 2013 Foreign Tax Authority | Dec. 31, 2013 Lower Penalties | Dec. 31, 2012 Lower Penalties | Dec. 31, 2013 UNITED STATES | Dec. 31, 2013 CANADA | Dec. 31, 2013 CANADA Expires through 2022 | Dec. 31, 2013 CANADA Carried forward indefinitely | Dec. 31, 2013 UNITED KINGDOM | Dec. 31, 2013 Other Countries
Income Taxes [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjusted loss carryforward and related valuation allowance |  |  |  |  |  |  | $ 700,000 |  |  |  | $ 4,800,000 |  |  |  |
Valuation allowances against current year net operating losses in certain tax jurisdictions |  |  |  |  |  | 1,300,000 |  |  |  |  |  |  |  |  |
Released valuation allowance previously recorded on certain U.S. state tax credits |  |  |  |  |  | 300,000 |  |  |  |  |  |  |  |  |
Tax benefit recognized due to the release of a portion of the valuation allowance on deferred tax assets | 15,300,000 | 15,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Loss carryforwards |  |  | 10,000,000 |  |  |  |  |  |  | 1,800,000 | 7,100,000 |  |  | 700,000 | 400,000
Operating loss carryforwards expiration year |  |  |  |  |  |  |  |  |  | 2033 | 2015 |  |  |  |
Tax credits | 5,101,000 | 5,101,000 | 3,817,000 |  |  |  |  |  |  | 1,600,000 | 2,200,000 | 1,400,000 | 800,000 |  |
Tax credits, expiration Year |  |  |  |  |  |  |  |  |  | 2033 |  | 2022 |  |  |
Undistributed earnings of foreign subsidiaries |  |  | 13,900,000 |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized Tax Benefits | 7,554,000 | 7,554,000 | 7,074,000 | 7,284,000 | 5,088,000 |  |  | 300,000 | 600,000 |  |  |  |  |  |
Unrecognized tax benefits that will impact tax rate if recognized | 4,300,000 | 4,300,000 | 4,900,000 |  |  |  |  |  |  |  |  |  |  |  |
Settlements with taxation authorities |  | 3,035,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum unrecognized tax benefits expected to be recorded in next twelve months |  |  | 2,100,000 |  |  |  |  |  |  |  |  |  |  |  |
Unrecognized tax benefit income tax interest and penalties accrued | $ 600,000 | $ 600,000 | $ 300,000 |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 + Details
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- Definition The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. + 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 Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32559-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 30 -Paragraph 5 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6907311&loc=d3e30536-109315 + Details
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