v3.4.0.3

Segment Information - Additional Information (Detail) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($) Aircraft Segment Contract Entity States Location Employees Pilot	Mar. 31, 2015
Segment Reporting Information [Line Items]
Number of reportable segments | Segment	3
Number of aircraft operated	100
Number of contracts | Contract	0
Fixed revenue streams | Entity	0
Hospitals Contracts [Member]
Segment Reporting Information [Line Items]
Segment revenue	31.00%	42.00%
Voluntary Employee Retirement Package [Member]
Segment Reporting Information [Line Items]
Qualifying age	64 years
Number of employees accepted VERP | Employees	15
Severance costs | $	$ 1.6
Remaining unpaid portion of severance costs | $	0.8
Voluntary Furlough Program to Oil and Gas Pilots [Member]
Segment Reporting Information [Line Items]
Severance costs | $	$ 0.4
Number of employees accepted furlough program | Pilot	26
Guaranteed period to recall under program	12 months
Oil and Gas [Member]
Segment Reporting Information [Line Items]
Number of aircraft operated	154
Segment revenue	54.00%	59.00%
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
Air Medical [Member]
Segment Reporting Information [Line Items]
Segment revenue	43.00%	35.00%
Number of aircraft assigned	105
Number of states in which company operates aircrafts | States	19
Locations in which company operates Aircrafts | Location	70
Air Medical [Member] | Middle East [Member]
Segment Reporting Information [Line Items]
Number of aircraft operated	5
Locations in which company operates Aircrafts | Location	4
Number of revenue generating aircrafts	4
Technical Services [Member]
Segment Reporting Information [Line Items]
Segment revenue	3.00%	6.00%

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Locations in which company operates aircrafts.

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Number of employees accepted voluntary furlough program.

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Number of employees accepted voluntary retirement.

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Number of operating states.

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Number of revenue generating aircrafts.

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Offer of recall employees, guaranteed period under program.

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Percentage of revenue.

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Postretirement benefit plan qualifying age.

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Working period with major customers.

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Number of aircraft operated by the carrier.

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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.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB TOPIC 5.P.4(b))
-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747

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-URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140864-122747

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-SubTopic 10
-Section 45
-Paragraph 28
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-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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