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Reconciliations Between Statutory Federal Income Tax Rate and Effective Rate (Detail) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Tax Disclosure [Abstract] |  |  |
Statutory Federal income tax rate | 34.00% | 34.00% | 34.00%
Increase (Decrease) resulting from: |  |  |
U.S. Taxes on foreign income, net of taxes paid credit | 1.00% | 0.30% | (1.70%)
Change in valuation allowance | (1.90%) | (0.80%) |
Foreign, state and local tax, net of Federal benefit | 1.60% | 1.90% | 3.60%
Nondeductible expenses | 1.80% | 1.80% | 1.40%
Stock option compensation | (0.10%) | (0.10%) | (0.50%)
Research and development credits | (0.90%) | (0.50%) | (2.30%)
Effect of different tax rates of foreign jurisdictions | (12.10%) | (10.00%) | (10.80%)
Undistributed profits of subsidiaries | 2.40% |  |
Other tax exempt income | (0.10%) | (0.90%) |
Other | 0.30% | (0.10%) | 0.30%
Effective rate | 26.00% | 25.60% | 24.00%

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 + Details
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