v2.4.0.8

Fair Value of Financial Instruments (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Derivatives, Fair Value [Line Items] |  |  |
Percentage of fuel cost of operating expenses (in hundredths) | 4.20% | 3.80% | 3.40%
Derivative agreements (in dollars per gallon) | 3.55 | 3.50 | 2.68
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized loss on derivative instrument | $ 143,000 | $ 257,000 | $ 800,000
Cash settlements under derivative contracts |  |  | 1,131,000
Estimate of Fair Value |  |  |
Fair value of financial instruments [Abstract] |  |  |
Long-term debt, fair value disclosure | 513,436,000 | 406,856,000 |
Carrying (Reported) Amount |  |  |
Fair value of financial instruments [Abstract] |  |  |
Long-term debt, fair value disclosure | 516,453,000 | 404,478,000 |
Aircraft operations expense |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Unrealized loss on derivative instrument | $ 143,000 | $ 257,000 | $ 800,000

X
- Definition Cash settlements under the terms of the agreements for fuel derivative contracts. + References No definition available. + Details
Name: | airm_CashSettlementsUnderDerivativeContracts
Namespace Prefix: | airm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Derivatives fuel costs represented as percentage of company's operating expenses. + References No definition available. + Details
Name: | airm_FuelCostAsPercentageOfOperatingExpenses
Namespace Prefix: | airm_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativesFairValueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentsFinancialLiabilitiesBalanceSheetGroupingsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
Name: | us-gaap_LongTermDebtFairValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Specified interest rate, security price, commodity price, foreign exchange rate, index of prices or rates for a derivative contract measured in volume but not the derivative contract itself. + References No definition available. + Details
Name: | us-gaap_UnderlyingDerivativeVolume
Namespace Prefix: | us-gaap_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
Name: | us-gaap_UnrealizedGainLossOnDerivatives
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration