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Total Income Tax Expense Applying U.S. Federal Income Tax Rate (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Components Of Income Tax Expense Benefit [Line Items] |  |  |
Computed tax expense at statutory federal rates | $ 3,010 | $ 1,536 | $ 18,678
Increase (decrease) in taxes resulting from: |  |  |
State taxes, net of federal income tax benefit | 454 | (11) | 1,983
Domestic production deduction | (179) | 420 | (1,142)
Income tax credits | (662) | (728) | (724)
Foreign tax rate differential | (1,590) | (2,159) | (1,459)
Subpart F income | 9 | 338 |
Equity Investment | 223 | 10 | 345
Stock Based Compensation | 244 | 219 | 461
State Tax Rate Change | 185 | (257) | 83
Unrecognized tax benefits | 168 | 32 | 419
Foreign Tax Gross Up | 83 | 10 | 24
Meals and Entertainment | 73 | 76 | 103
Other expenses | (9) | 63 | 145
Total income tax expense (benefit) | $ 2,009 | $ (451) | $ 18,916

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- Definition Amount of current and deferred federal income tax expense (benefit) attributable to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32672-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Income Tax Expense (or Benefit) -URI http://asc.fasb.org/extlink&oid=6515339 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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