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v2.4.1.9

Revolving Credit Facility (Details) (USD $) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Line of Credit Facility [Line Items] |  |
Actual net worth for compliance | $ 175,700,000aaon_ActualNetWorthForCompliance |
Minimum net worth required for compliance | 95,000,000us-gaap_MinimumNetWorthRequiredForCompliance |
Ratio of total liability to net worth | 0.3aaon_RatioOfTotalLiabilityToNetWorth |
Maximum ratio of total liability to net worth for compliance | 2aaon_MaximumRatioOfTotalLiabilityToNetWorthRequiredForCompliance |
Actual working capital for compliance | 88,400,000aaon_ActualWorkingCapitalForCompliance |
Minimum working capital for compliance | 40,000,000aaon_MinimumWorkingCapitalRequiredForCompliance |
Revolving Credit Facility [Member] |  |
Line of Credit Facility [Line Items] |  |
Credit facility maximum borrowings | 30,000,000.0us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Standby letter of credit | 800,000aaon_LineOfCreditFacilityStandbyLetterOfCredit / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Borrowings available under the revolving credit facility | 29,200,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Frequency of periodic payments | monthly |
Fees associated with unused portion of committed amount | 0us-gaap_LineOfCreditFacilityCommitmentFeeAmount / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember |
Borrowings outstanding under revolving credit facility | $ 0us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember | $ 0us-gaap_LineOfCreditFacilityAmountOutstanding / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember
Weighted average interest rate | 2.70%us-gaap_DebtWeightedAverageInterestRate / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember | 2.70%us-gaap_DebtWeightedAverageInterestRate / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember
Revolving Credit Facility [Member] | LIBOR [Member] |  |
Line of Credit Facility [Line Items] |  |
Stated percentage | 2.50%us-gaap_DebtInstrumentInterestRateStatedPercentage / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember / us-gaap_VariableRateAxis = us-gaap_LondonInterbankOfferedRateLIBORMember |

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- Definition Actual Net Worth for Compliance + References No definition available. + Details
Name: | aaon_ActualNetWorthForCompliance
Namespace Prefix: | aaon_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Actual Working Capital for Compliance + References No definition available. + Details
Name: | aaon_ActualWorkingCapitalForCompliance
Namespace Prefix: | aaon_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of standby letter of credit outstanding under the revolving credit agreement. + References No definition available. + Details
Name: | aaon_LineOfCreditFacilityStandbyLetterOfCredit
Namespace Prefix: | aaon_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Maximum Ratio of Total Liability to Net Worth Required for Compliance + References No definition available. + Details
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Namespace Prefix: | aaon_
Data Type: | xbrli:pureItemType
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Period Type: | instant

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- Definition Minimum Working Capital Required for Compliance + References No definition available. + Details
Name: | aaon_MinimumWorkingCapitalRequiredForCompliance
Namespace Prefix: | aaon_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Ratio of Total Liability to Net Worth + References No definition available. + Details
Name: | aaon_RatioOfTotalLiabilityToNetWorth
Namespace Prefix: | aaon_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Weighted average interest rate of debt outstanding. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Amount borrowed under the credit facility as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Amount of the fee for available but unused credit capacity under the credit facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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- Details
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Balance Type: | na
Period Type: | duration

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 22 -Article 5 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The lowest amount of net worth (total assets minus total liabilities) required by secondary market investors or state-imposed regulatory mandates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47304-110998 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (c)(a) -URI http://asc.fasb.org/extlink&oid=6490092&loc=d3e47080-110998 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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