COMMITMENTS AND CONTINGENCIES (Details) $ in Thousands			1 Months Ended	12 Months Ended
	Apr. 29, 2016 aircraft People	Feb. 03, 2016 aircraft People	Nov. 30, 2005 USD ($) Affiliates	Mar. 31, 2016 USD ($) aircraft Facility	Mar. 31, 2015 USD ($) aircraft	Mar. 31, 2014 USD ($) aircraft	Aug. 12, 2015 People
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded unconditional purchase obligation | $				$ 327,300
Number of signed client contracts				8
Number of aircraft assigned future payments						7
Proceeds from assignment of aircraft purchase agreements | $				$ 0	$ 0	$ 106,113
Number of aircrafts purchased without orders				1	3
Operating lease [Line Items]
Operating leases rental expense | $				$ 211,800	$ 164,800	$ 105,800
Operating leases, future minimum payments, due 2017 | $				184,734
Operating leases, future minimum payments, due 2018 | $				164,751
Operating leases, future minimum payments, due 2019 | $				135,877
Operating leases, future minimum payments, due 2020 | $				94,638
Operating leases, future minimum payments, due 2021 | $				26,998
Operating leases, future minimum payments, due thereafter | $				58,970
Operating leases, future minimum payments, total | $				$ 665,968
Number of aircraft sale leaseback				3	14	14
Proceeds from assignment of aircraft purchase agreements | $				$ 0	$ 0	$ 106,113
Number of aircraft assigned future payments						7
Sale leaseback transaction lease terms, maximum				180 months
Sale leaseback transaction lease renewal option terms, maximum				240 months
Sale leaseback transaction, gross proceeds | $				$ 29,200	380,700	$ 246,400
Number of operating lease				87
Collective bargaining agreements, maximum annual escalation per employee, percent				6.00%
Site contingency, number of locations | Facility				3
Number of aircraft operated				463
Loss contingency, range of possible loss, minimum | $				$ 7,000
Loss contingency, range of possible loss, maximum | $				$ 10,000
Nigerian litigation
Operating lease [Line Items]
Number of affiliates | Affiliates			2
Loss contingency, damages sought, value | $			$ 16,300
Nigeria fatal accident
Operating lease [Line Items]
Number of surviving passengers | People							6
Nigeria fatal accident | Crew
Operating lease [Line Items]
Number of fatalities | People							2
Nigeria fatal accident | Passenger
Operating lease [Line Items]
Number of fatalities | People							4
Nigeria water landing
Operating lease [Line Items]
Number of aircraft suspend operations		16
Nigeria water landing | Crew
Operating lease [Line Items]
Number of people onboard | People		2
Nigeria water landing | Passenger
Operating lease [Line Items]
Number of people onboard | People		9
Subsequent event | CHC fatal accident
Operating lease [Line Items]
Number of fatalities | People	13
Subsequent event | CHC fatal accident | Crew
Operating lease [Line Items]
Number of fatalities | People	2
Subsequent event | CHC fatal accident | Passenger
Operating lease [Line Items]
Number of fatalities | People	11
Unionized employees concentration risk
Operating lease [Line Items]
Concentration risk, percentage				50.00%
Unionized employees concentration risk | Workforce subject to collective bargaining arrangements expiring within one year
Operating lease [Line Items]
Concentration risk, percentage				84.90%
Fiscal year 2017 to fiscal year 2018
Operating lease [Line Items]
Number of operating lease				20
Fiscal year 2019 to fiscal year 2021
Operating lease [Line Items]
Number of operating lease				44
Fiscal year 2022 to fiscal year 2024
Operating lease [Line Items]
Number of operating lease				23
Aircraft operating lease
Operating lease [Line Items]
Operating leases rental expense | $				$ 184,000	$ 138,300	$ 83,500
Operating leases, future minimum payments, due 2017 | $				174,349
Operating leases, future minimum payments, due 2018 | $				154,156
Operating leases, future minimum payments, due 2019 | $				126,003
Operating leases, future minimum payments, due 2020 | $				86,449
Operating leases, future minimum payments, due 2021 | $				19,614
Operating leases, future minimum payments, due thereafter | $				12,663
Operating leases, future minimum payments, total | $				573,234
Other operating lease
Operating lease [Line Items]
Operating leases, future minimum payments, due 2017 | $				10,385
Operating leases, future minimum payments, due 2018 | $				10,595
Operating leases, future minimum payments, due 2019 | $				9,874
Operating leases, future minimum payments, due 2020 | $				8,189
Operating leases, future minimum payments, due 2021 | $				7,384
Operating leases, future minimum payments, due thereafter | $				46,307
Operating leases, future minimum payments, total | $				$ 92,734
H225 Super Puma | Subsequent event
Operating lease [Line Items]
Number of aircraft operated	27
Number of aircrafts owned	16
Number of leased aircraft	11
H225 Super Puma | Subsequent event | Norway
Operating lease [Line Items]
Number of aircraft operated	5
Number of aircraft continue operations	4
H225 Super Puma | Subsequent event | United Kingdom
Operating lease [Line Items]
Number of aircraft operated	13
H225 Super Puma | Subsequent event | Australia
Operating lease [Line Items]
Number of aircraft operated	9
Number of aircraft suspend operations	6
Number of aircraft continue operations	3
Commitments
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of aircraft - beginning balance				45	43	45
Number of aircraft delivered				(8)	(18)	(21)
Number of aircraft ordered				0	8	18
New options				0	0	0
Number of exercised options				(1)	12	8
Number of expired options				0	0	0
Number of orders assigned subject to leaseback				0	0	(7)
Number of aircraft - ending balance				36	45	43
Options
Unrecorded Unconditional Purchase Obligation [Line Items]
Number of aircraft - beginning balance				30	55	70
Number of aircraft delivered				0	0	0
Number of aircraft ordered				0	0	0
New options				4	0	0
Number of exercised options				0	(12)	(8)
Number of expired options				(20)	(13)	(7)
Number of orders assigned subject to leaseback				0	0	0
Number of aircraft - ending balance				14	30	55
Aircraft
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded unconditional purchase obligation minimum quantity required, due in one year				14
Unrecorded unconditional purchase obligation minimum quantity required, due in year two				9
Unrecorded unconditional purchase obligation minimum quantity required, due in year three				4
Unrecorded unconditional purchase obligation minimum quantity required, due in year four and thereafter				9
Unrecorded unconditional purchase obligation, minimum quantity required				36
Unrecorded unconditional purchase obligation, due within one year | $				$ 105,249
Unrecorded unconditional purchase obligation, due within two years | $				124,252
Unrecorded unconditional purchase obligation, due within three years | $				60,455
Unrecorded unconditional purchase obligation, due within four years and thereafter | $				109,341
Unrecorded unconditional purchase obligation | $				$ 399,297
Unrecorded conditional purchase obligation, maximum quantity required, due in one year				0
Unrecorded conditional purchase obligation, maximum quantity required, due in year two				12
Unrecorded conditional purchase obligation, maximum quantity required, due in year three				2
Unrecorded conditional purchase obligation, maximum quantity required, due in year four and thereafter				0
Unrecorded conditional purchase obligation, maximum quantity required				14
Unrecorded conditional purchase obligation balance on first anniversary | $				$ 61,629
Unrecorded conditional purchase obligation balance on second anniversary | $				179,471
Unrecorded conditional purchase obligation balance on third anniversary | $				30,410
Unrecorded conditional purchase obligation balance on fourth anniversary and thereafter | $				0
Unrecorded conditional purchase obligation balance sheet amount | $				271,510
Aircraft | Medium and large aircraft
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded unconditional purchase obligation, due within one year | $				49,746
Unrecorded unconditional purchase obligation, due within two years | $				66,044
Unrecorded unconditional purchase obligation, due within three years | $				60,455
Unrecorded unconditional purchase obligation, due within four years and thereafter | $				109,341
Unrecorded unconditional purchase obligation | $				$ 285,586
Aircraft | U.K. SAR configured aircraft
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded unconditional purchase obligation minimum quantity required, due in one year				4
Unrecorded unconditional purchase obligation minimum quantity required, due in year two				4
Unrecorded unconditional purchase obligation minimum quantity required, due in year three				0
Unrecorded unconditional purchase obligation minimum quantity required, due in year four and thereafter				0
Unrecorded unconditional purchase obligation, minimum quantity required				8
Unrecorded unconditional purchase obligation, due within one year | $				$ 55,503
Unrecorded unconditional purchase obligation, due within two years | $				58,208
Unrecorded unconditional purchase obligation, due within three years | $				0
Unrecorded unconditional purchase obligation, due within four years and thereafter | $				0
Unrecorded unconditional purchase obligation | $				$ 113,711
Aircraft | Medium aircraft
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded unconditional purchase obligation minimum quantity required, due in one year				10
Unrecorded unconditional purchase obligation minimum quantity required, due in year two				0
Unrecorded unconditional purchase obligation minimum quantity required, due in year three				0
Unrecorded unconditional purchase obligation minimum quantity required, due in year four and thereafter				0
Unrecorded unconditional purchase obligation, minimum quantity required				10
Unrecorded conditional purchase obligation, maximum quantity required, due in one year				0
Unrecorded conditional purchase obligation, maximum quantity required, due in year two				6
Unrecorded conditional purchase obligation, maximum quantity required, due in year three				0
Unrecorded conditional purchase obligation, maximum quantity required, due in year four and thereafter				0
Unrecorded conditional purchase obligation, maximum quantity required				6
Aircraft | Large aircraft
Unrecorded Unconditional Purchase Obligation [Line Items]
Unrecorded unconditional purchase obligation minimum quantity required, due in one year				0
Unrecorded unconditional purchase obligation minimum quantity required, due in year two				5
Unrecorded unconditional purchase obligation minimum quantity required, due in year three				4
Unrecorded unconditional purchase obligation minimum quantity required, due in year four and thereafter				9
Unrecorded unconditional purchase obligation, minimum quantity required				18
Unrecorded conditional purchase obligation, maximum quantity required, due in one year				0
Unrecorded conditional purchase obligation, maximum quantity required, due in year two				6
Unrecorded conditional purchase obligation, maximum quantity required, due in year three				2
Unrecorded conditional purchase obligation, maximum quantity required, due in year four and thereafter				0
Unrecorded conditional purchase obligation, maximum quantity required				8