XML 67 R56.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Income Taxes (Narrative) (Details) - USD ($) $ in Millions |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 22, 2017 | Jun. 30, 2018 | Dec. 31, 2017
Income Tax Disclosure [Abstract] |  |  |
Doubling Bonus Depreciation | 100.00% |  |
Doubling bonus depreciation, period | 5 years |  |
Additional depreciation |  |  | $ 5.0
Income tax benefit |  | $ 0.6 |
Expected effective income tax rate for the year |  | 27.00% |

X
- Definition Bipartisan Budget Act, Additional Depreciation, Available for Tax Deduction + References No definition available. + Details
Name: | aaon_BipartisanBudgetActAdditionalDepreciationAvailableforTaxDeduction
Namespace Prefix: | aaon_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Bipartisan Budget Act, Income Tax Expense (Benefit) + References No definition available. + Details
Name: | aaon_BipartisanBudgetActIncomeTaxExpenseBenefit
Namespace Prefix: | aaon_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Expected Effective Income Tax Rate, Continuing Operations + References No definition available. + Details
Name: | aaon_ExpectedEffectiveIncomeTaxRateContinuingOperations
Namespace Prefix: | aaon_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax Cuts and Jobs Act, Doubling Bonus Depreciation + References No definition available. + Details
Name: | aaon_TaxCutsandJobsActDoublingBonusDepreciation
Namespace Prefix: | aaon_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Tax Cuts and Jobs Act, Doubling Bonus Depreciation, Period + References No definition available. + Details
Name: | aaon_TaxCutsandJobsActDoublingBonusDepreciationPeriod
Namespace Prefix: | aaon_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration