SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2016 USD ($) Country	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2014 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2016 USD ($) Customer Segments Country Regions	Mar. 31, 2015 USD ($) Business_Units	Mar. 31, 2014 USD ($)	Mar. 31, 2013
Segment Reporting Information [Line Items]
Number of operating segments | Segments									1
Number of reportable segments									4	5
Revenues	$ 381,719	$ 419,887	$ 446,911	$ 466,996	$ 450,355	$ 460,140	$ 475,636	$ 472,538	$ 1,715,513	$ 1,858,669	$ 1,669,582
Income (loss) from equity method investments									(1,807)	(3,839)	8,666
Operating income (loss)	(37,923)	22,077	(29,833)	4,834	27,702	8,916	44,064	65,192	(40,845)	145,874	186,977
Gain (loss) on disposal of assets	(6,800)	$ (2,200)	$ (14,000)	$ (7,700)	(10,300)	$ (26,300)	$ 100	$ 600	(30,693)	(35,849)	(722)
Capital expenditures									372,375	601,834	628,613
Total depreciation and amortization									136,812	114,293	95,977
Total identifiable assets	3,271,862				3,230,720				3,271,862	3,230,720
Total investments in unconsolidated affiliates - equity method	188,666				210,090				188,666	210,090
Long-lived assets	2,283,252				2,157,101				2,283,252	2,157,101
Construction in progress payments not allocated									84,800	232,300	494,500
Construction in progress	$ 307,360				306,012				307,360	306,012
Accelerated depreciation									$ 28,655	10,379
Number of countries in which entity operates | Country	20								20
Customer concentration risk | Sales revenue
Segment Reporting Information [Line Items]
Concentration risk, percentage									60.00%
Number of clients over 10% over three comparative years | Customer									1
Number of clients over 10% over one year | Customer									1
U.K.
Segment Reporting Information [Line Items]
Revenues									$ 587,493	616,191	526,149
Long-lived assets	$ 577,810				462,667				577,810	462,667
Australia
Segment Reporting Information [Line Items]
Revenues									272,407	228,774	168,424
Long-lived assets	305,933				241,149				305,933	241,149
Nigeria
Segment Reporting Information [Line Items]
Revenues									246,449	327,164	328,793
Long-lived assets	184,440				235,914				184,440	235,914
United States
Segment Reporting Information [Line Items]
Revenues									158,901	222,661	225,650
Long-lived assets	292,324				235,434				292,324	235,434
Canada
Segment Reporting Information [Line Items]
Revenues									61,257	61,713	32,895
Long-lived assets	180,665				215,245				180,665	215,245
Norway
Segment Reporting Information [Line Items]
Revenues									225,807	266,186	253,651
Long-lived assets	171,948				197,165				171,948	197,165
Falkland Islands
Segment Reporting Information [Line Items]
Revenues									44,724	9,172	0
Trinidad
Segment Reporting Information [Line Items]
Revenues									55,423	59,073	51,770
Long-lived assets	113,768				109,248				113,768	109,248
Brazil
Segment Reporting Information [Line Items]
Long-lived assets	56,453				80,540				56,453	80,540
Tanzania
Segment Reporting Information [Line Items]
Long-lived assets	15,670				54,845				15,670	54,845
Other countries
Segment Reporting Information [Line Items]
Revenues									63,052	67,735	82,250
Long-lived assets	76,881				18,882				76,881	18,882
FB Entities
Segment Reporting Information [Line Items]
Equity investment ownership percentage												50.00%
Income (loss) from equity method investments									0	0	$ 3,217
Helideck Certification Agency (HCA)
Segment Reporting Information [Line Items]
Equity investment ownership percentage											50.00%
Intersegment elimination
Segment Reporting Information [Line Items]
Revenues									15,755	16,749	$ 31,906
External customer
Segment Reporting Information [Line Items]
Revenues									$ 1,715,513	$ 1,858,669	$ 1,669,582
Customer 1 | Customer concentration risk | Sales revenue
Segment Reporting Information [Line Items]
Concentration risk, percentage									11.00%	12.00%	13.00%
Europe Caspian
Segment Reporting Information [Line Items]
Revenues									$ 863,852	$ 891,436	$ 762,717
Income (loss) from equity method investments									310	1,107	4,715
Operating income (loss)									50,406	128,543	122,647
Capital expenditures									127,072	192,689	38,294
Total depreciation and amortization									41,509	37,830	32,918
Total identifiable assets	1,068,192				972,163				1,068,192	972,163
Total investments in unconsolidated affiliates - equity method	298				65				298	65
Accelerated depreciation									600
Europe Caspian | Intersegment elimination
Segment Reporting Information [Line Items]
Revenues									5,708	7,444	12,652
Europe Caspian | External customer
Segment Reporting Information [Line Items]
Revenues									858,144	883,992	750,065
Africa
Segment Reporting Information [Line Items]
Revenues									255,256	347,272	334,230
Operating income (loss)									19,702	91,758	84,999
Capital expenditures									1,386	1,330	24,324
Total depreciation and amortization									29,337	17,333	14,173
Total identifiable assets	304,081				484,514				304,081	484,514
Accelerated depreciation									16,800	1,900
Africa | Intersegment elimination
Segment Reporting Information [Line Items]
Revenues									2	0	0
Africa | External customer
Segment Reporting Information [Line Items]
Revenues									255,254	347,272	334,230
Americas
Segment Reporting Information [Line Items]
Revenues									291,399	352,088	360,183
Income (loss) from equity method investments									(2,117)	(4,946)	3,951
Operating income (loss)									34,463	79,176	69,480
Capital expenditures									92,418	124,854	52,563
Total depreciation and amortization									36,371	34,617	33,848
Total identifiable assets	884,455				966,538				884,455	966,538
Total investments in unconsolidated affiliates - equity method	183,990				210,025				183,990	210,025
Accelerated depreciation									6,000	2,500
Americas | Intersegment elimination
Segment Reporting Information [Line Items]
Revenues									7,834	6,003	17,555
Americas | External customer
Segment Reporting Information [Line Items]
Revenues									283,565	346,085	342,628
Asia Pacific
Segment Reporting Information [Line Items]
Revenues									296,842	257,605	212,190
Operating income (loss)									4,073	12,455	18,227
Capital expenditures									23,745	23,077	7,058
Total depreciation and amortization									20,526	23,450	12,351
Total identifiable assets	426,677				401,973				426,677	401,973
Accelerated depreciation									5,300	6,000
Asia Pacific | Intersegment elimination
Segment Reporting Information [Line Items]
Revenues									2	254	0
Asia Pacific | External customer
Segment Reporting Information [Line Items]
Revenues									296,840	257,351	212,190
Corporate and other
Segment Reporting Information [Line Items]
Revenues									23,919	27,017	32,168
Operating income (loss)									(118,796)	(130,209)	(107,654)
Capital expenditures									127,754	259,884	506,374
Total depreciation and amortization									9,069	1,063	2,687
Total identifiable assets	588,457				405,532				588,457	405,532
Total investments in unconsolidated affiliates - equity method	$ 4,378				$ 0				4,378	0
Corporate and other | Intersegment elimination
Segment Reporting Information [Line Items]
Revenues									2,209	3,048	1,699
Corporate and other | External customer
Segment Reporting Information [Line Items]
Revenues									$ 21,710	$ 23,969	$ 30,469