v3.7.0.1

Segment Information - Additional Information (Detail) | 3 Months Ended
--- | ---
Mar. 31, 2017 Aircraft Segment Location States | Mar. 31, 2016
Segment Reporting Information [Line Items] |  |
Number of reportable segments | Segment | 3 |
National Science Foundation [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of aircraft assigned | 6 |
Hospitals Contracts [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment revenue | 19.00% | 31.00%
Fixed Term Customer Contract [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment revenue | 90.00% | 93.00%
Contracted Customers [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment revenue | 10.00% | 7.00%
Minimum [Member] |  |
Segment Reporting Information [Line Items] |  |
Term of contract | 1 year |
Maximum [Member] |  |
Segment Reporting Information [Line Items] |  |
Term of contract | 7 years |
Oil and Gas [Member] |  |
Segment Reporting Information [Line Items] |  |
Number of aircraft available for use | 131 |
Segment revenue | 53.00% | 54.00%
Oil and Gas [Member] | Minimum [Member] | Major Customer [Member] |  |
Segment Reporting Information [Line Items] |  |
Working period with major customers | 30 years |
Oil and Gas [Member] | Minimum [Member] | ENI Petroleum [Member] |  |
Segment Reporting Information [Line Items] |  |
Working period with major customers | 15 years |
Technical Services [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment revenue | 6.00% | 3.00%
Air Medical [Member] |  |
Segment Reporting Information [Line Items] |  |
Segment revenue | 41.00% | 43.00%
Number of aircraft assigned | 104 |
Number of states in which company operates aircrafts | States | 18 |
Locations in which company operates Aircrafts | Location | 72 |

X
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- Definition Number of aircraft available for use. + References No definition available. + Details
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- Definition Number Of Aircrafts Assigned + References No definition available. + Details
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X
- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |

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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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- Details
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