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v2.4.1.9

Income Taxes (Details Narrative) (USD $) | 12 Months Ended | 3 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2014
Income Tax Contingency [Line Items] |  |  |  |
Income tax provision | $ 24,088,000us-gaap_IncomeTaxExpenseBenefit | $ 18,747,000us-gaap_IncomeTaxExpenseBenefit | $ 16,868,000us-gaap_IncomeTaxExpenseBenefit |
Anticipated tax credit under American Taxpayer Relief Act of 2012 | 500,000aaon_AnticipatedtaxcreditunderAmericanTaxpayerReliefActof2012 |  |  |
Overall effective tax rate under American Taxpayer Relief Act of 2012 |  | 35.50%aaon_EffiectiveInterestTaxRateDueToATRA |  |
Investment Tax Credit Carryforward [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Income tax provision |  |  |  | (600,000)us-gaap_IncomeTaxExpenseBenefit / us-gaap_ChangeInAccountingEstimateByTypeAxis = us-gaap_InvestmentCreditMember
State and Local Jurisdiction [Member] |  |  |  |
Income Tax Contingency [Line Items] |  |  |  |
Income tax provision | $ 200,000us-gaap_IncomeTaxExpenseBenefit / us-gaap_IncomeTaxAuthorityAxis = us-gaap_StateAndLocalJurisdictionMember |  |  |

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- Definition Effective income tax rate due to American Tax Payer Relief Act. + References No definition available. + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: 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)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 3: 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 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32639-109319 + Details
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