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Share-Based Compensation (Summary of Share-Based Compensation Expense) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2015 | Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |
Options | $ 152 aaon_AllocatedShareBasedCompensationExpenseStockOptions | $ 208 aaon_AllocatedShareBasedCompensationExpenseStockOptions
Restricted stock | 286 aaon_AllocatedShareBasedCompensationExpenseRestrictedStock | 204 aaon_AllocatedShareBasedCompensationExpenseRestrictedStock
Total | $ 438 us-gaap_AllocatedShareBasedCompensationExpense | $ 412 us-gaap_AllocatedShareBasedCompensationExpense

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- Definition Share-based compensation expense related to resticted stock. + References No definition available. + Details
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- Definition Share-based compensation expense related to options. + References No definition available. + Details
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Namespace Prefix: | aaon_
Data Type: | xbrli:monetaryItemType
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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Details
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