v2.4.0.8

Commitments, Contingencies, and Concentrations (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Open purchase commitments [Abstract] |  |
Open purchase commitments | $ 194,200,000 |
Total number of aircraft to be purchased under purchase commitment | 60 |
Nonrefundable deposits | 18,300,000 |
Number of Helicopters | Supplier Concentration Risk, Helicopter Fleet | Airbus Helicopters |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage (in hundredths) | 82.00% |
Number of Helicopters | Supplier Concentration Risk, Helicopter Fleet | Bell Helicopter, Inc. |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage (in hundredths) | 16.00% |
Number of Employees | Labor Force Concentration Risk | Pilots Under Collective Bargaining Agreement |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage (in hundredths) | 28.00% |
Number of Transports | Customer Concentration Risk, Transports | Private insurance carriers |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage (in hundredths) | 33.00% | 35.00%
Number of Transports | Customer Concentration Risk, Transports | Medicare |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage (in hundredths) | 33.00% | 31.00%
Number of Transports | Customer Concentration Risk, Transports | Medicaid |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage (in hundredths) | 21.00% | 21.00%
Number of Transports | Customer Concentration Risk, Transports | Self-pay patients |  |
Concentration Risk [Line Items] |  |
Concentration risk, percentage (in hundredths) | 13.00% | 13.00%
Revolving Credit Facility Due 2017 |  |
Letters of Credit [Line Items] |  |
Number of letters of credit reducing available borrowing capacity under revolving credit facility | 3 |
Amount of letters of credit reducing available borrowing capacity under revolving credit facility | $ 3,525,000 |

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

X
- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date which reduces the borrowing capacity under the revolving credit facility. + References No definition available. + Details
Name: | airm_LettersOfCreditOutstandingAmountReducingAvailableBorrowingCapacityUnderRevolvingCreditFacility
Namespace Prefix: | airm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of letters of credit outstanding as of the balance sheet date which reduce the borrowing capacity under the revolving credit facility. + References No definition available. + Details
Name: | airm_NumberOfLettersOfCreditReducingAvailableBorrowingCapacityUnderRevolvingCreditFacility
Namespace Prefix: | airm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of nonrefundable deposits the entity has paid under the unrecorded unconditional purchase obligation. + References No definition available. + Details
Name: | airm_UnrecordedUnconditionalPurchaseObligationNonrefundableDepositAmount
Namespace Prefix: | airm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Amount of the unrecorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394976&loc=d3e25336-109308 + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The minimum number of units that must be purchased, in connection with an unconditional purchase obligation that has not been recognized for financial reporting purposes. + References No definition available. + Details
Name: | us-gaap_UnrecordedUnconditionalPurchaseObligationMinimumQuantityRequired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant