XML 36 R53.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Stockholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 0 Months Ended | 52 Months Ended | 111 Months Ended | 95 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Nov. 04, 2014 | May 02, 2014 | May 17, 2010 | Sep. 30, 2014 | Sep. 30, 2014 | Sep. 30, 2014
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |
Cash dividends declared per common share | $ 0 us-gaap_CommonStockDividendsPerShareDeclared | $ 0 us-gaap_CommonStockDividendsPerShareDeclared |  |  |  |  |  |
Dividend Declared [Member] |  |  |  |  |  |  |  |
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |
Cash dividends declared per common share |  |  | $ 0.09 us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = us-gaap_DividendDeclaredMember | $ 0.09 us-gaap_CommonStockDividendsPerShareDeclared / us-gaap_DividendsAxis = us-gaap_DividendDeclaredMember |  |  |  |
2010 Stock Repurchase Program |  |  |  |  |  |  |  |
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |
Stock repurchase program authorized percentage |  |  |  |  | 5.00%aaon_StockRepurchaseProgramAuthorizedPercent / us-gaap_ShareRepurchaseProgramAxis = aaon_A2010StockRepurchaseProgramMember |  |  |
Stock repurchase program amount authorized (in shares) |  |  |  |  | 2,900,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_ShareRepurchaseProgramAxis = aaon_A2010StockRepurchaseProgramMember |  |  |
Stock repurchased during period (in shares) |  |  |  |  |  | 2,600,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_ShareRepurchaseProgramAxis = aaon_A2010StockRepurchaseProgramMember |  |
Aggregate price of shares repurchased since inception |  |  |  |  |  | $ 31.5 us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_ShareRepurchaseProgramAxis = aaon_A2010StockRepurchaseProgramMember |  |
Average price of shares repurchased since inception (per share) |  |  |  |  |  | $ 11.97 us-gaap_TreasuryStockAcquiredAverageCostPerShare / us-gaap_ShareRepurchaseProgramAxis = aaon_A2010StockRepurchaseProgramMember |  |
2005 401(k) Stock Repurchase Program |  |  |  |  |  |  |  |
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |
Stock repurchased during period (in shares) | 100,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_ShareRepurchaseProgramAxis = aaon_A2005401kStockRepurchaseProgramMember | 100,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_ShareRepurchaseProgramAxis = aaon_A2005401kStockRepurchaseProgramMember |  |  |  |  | 5,200,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_ShareRepurchaseProgramAxis = aaon_A2005401kStockRepurchaseProgramMember |
Aggregate price of shares repurchased since inception |  |  |  |  |  |  | 42.2 us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_ShareRepurchaseProgramAxis = aaon_A2005401kStockRepurchaseProgramMember |
Average price of shares repurchased since inception (per share) |  |  |  |  |  |  | $ 8.18 us-gaap_TreasuryStockAcquiredAverageCostPerShare / us-gaap_ShareRepurchaseProgramAxis = aaon_A2005401kStockRepurchaseProgramMember |
2006 Director and Officer Repurchase Program |  |  |  |  |  |  |  |
Schedule of Shareholders' Equity [Line Items] |  |  |  |  |  |  |  |
Stock repurchased during period (in shares) | 2,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_ShareRepurchaseProgramAxis = aaon_A2006DirectorandOfficerRepurchaseProgramMember | 44,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_ShareRepurchaseProgramAxis = aaon_A2006DirectorandOfficerRepurchaseProgramMember |  |  |  |  |  | 1,800,000 us-gaap_TreasuryStockSharesAcquired / us-gaap_ShareRepurchaseProgramAxis = aaon_A2006DirectorandOfficerRepurchaseProgramMember
Aggregate price of shares repurchased since inception |  |  |  |  |  |  |  | $ 14.0 us-gaap_TreasuryStockValueAcquiredCostMethod / us-gaap_ShareRepurchaseProgramAxis = aaon_A2006DirectorandOfficerRepurchaseProgramMember
Average price of shares repurchased since inception (per share) |  |  |  |  |  |  |  | $ 7.76 us-gaap_TreasuryStockAcquiredAverageCostPerShare / us-gaap_ShareRepurchaseProgramAxis = aaon_A2006DirectorandOfficerRepurchaseProgramMember

X
- Details
Name: | aaon_ScheduleOfShareholdersEquityLineItems
Namespace Prefix: | aaon_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Share based compensation number of reserved shares for potential issuance as a percentage of outstanding common stock. + References No definition available. + Details
Name: | aaon_StockRepurchaseProgramAuthorizedPercent
Namespace Prefix: | aaon_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Aggregate dividends declared during the period for each share of common stock outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
Name: | us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Article 3 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockValueAcquiredCostMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_DividendsAxis=us-gaap_DividendDeclaredMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=aaon_A2005401kStockRepurchaseProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=aaon_A2006DirectorandOfficerRepurchaseProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=aaon_A2010StockRepurchaseProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |