Income Taxes - Reconciliation of Statutory Federal Income Tax to Effective Tax (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
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Jan. 31, 2015
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Oct. 31, 2014
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Jul. 31, 2014
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Apr. 30, 2014
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Jan. 31, 2014
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Oct. 31, 2013
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Jul. 31, 2013
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Apr. 30, 2013
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Jan. 31, 2015
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Jan. 31, 2014
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Jan. 31, 2013
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Income Tax Disclosure [Abstract] | |||||||||||
Federal tax statutory tax rate | $ 23,470us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 13,475us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 10,182us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | ||||||||
State taxes | 1,429us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 904us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | 880us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes | ||||||||
Nondeductible expenses | 140us-gaap_IncomeTaxReconciliationNondeductibleExpense | 55us-gaap_IncomeTaxReconciliationNondeductibleExpense | 80us-gaap_IncomeTaxReconciliationNondeductibleExpense | ||||||||
Research and development credit | (2,028)us-gaap_IncomeTaxReconciliationTaxCreditsResearch | (880)us-gaap_IncomeTaxReconciliationTaxCreditsResearch | (351)us-gaap_IncomeTaxReconciliationTaxCreditsResearch | ||||||||
Domestic manufacturing deduction | (431)us-gaap_IncomeTaxReconciliationDeductions | (1,124)us-gaap_IncomeTaxReconciliationDeductions | (699)us-gaap_IncomeTaxReconciliationDeductions | ||||||||
Stock-based compensation | 2,506us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 1,802us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | 231us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost | ||||||||
Foreign rate differential | 1,101us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (164)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | (50)us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential | ||||||||
Valuation allowance | 1,589us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | 512us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | (52)us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance | ||||||||
Others | (973)us-gaap_IncomeTaxReconciliationOtherReconcilingItems | 305us-gaap_IncomeTaxReconciliationOtherReconcilingItems | 89us-gaap_IncomeTaxReconciliationOtherReconcilingItems | ||||||||
Provision for income taxes | $ 5,697us-gaap_IncomeTaxExpenseBenefit | $ 8,694us-gaap_IncomeTaxExpenseBenefit | $ 7,106us-gaap_IncomeTaxExpenseBenefit | $ 5,306us-gaap_IncomeTaxExpenseBenefit | $ 4,696us-gaap_IncomeTaxExpenseBenefit | $ 3,585us-gaap_IncomeTaxExpenseBenefit | $ 3,775us-gaap_IncomeTaxExpenseBenefit | $ 2,829us-gaap_IncomeTaxExpenseBenefit | $ 26,803us-gaap_IncomeTaxExpenseBenefit | $ 14,885us-gaap_IncomeTaxExpenseBenefit | $ 10,310us-gaap_IncomeTaxExpenseBenefit |
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- Details
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- Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deductions. Including, but not limited to, extraterritorial income exclusion deduction, qualified production activity deduction, dividend deduction, deduction for dividend paid to employee stock ownership plan, Medicare prescription drug benefit subsidy deduction, and other deductions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible expenses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to nondeductible equity-based compensation costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to state and local income tax expense (benefit). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to research tax credit. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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