SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended		12 Months Ended
	Jun. 30, 2015 USD ($) Segments Regions	Jun. 30, 2014 USD ($)	Mar. 31, 2015 USD ($) Business_Units
Segment Reporting Information [Line Items]
Number of operating segments | Segments	1
Number of reportable segments	4		5
Revenues	$ 466,996	$ 472,538
Total earnings from unconsolidated affiliates, net of losses - equity method investments	6,296	4,281
Gain (loss) on disposal of assets	(7,695)	610
Total consolidated operating income	4,834	65,192
Total depreciation and amortization	37,146	25,334
Total identifiable assets	3,242,691		$ 3,230,720
Total investments in unconsolidated affiliates - equity method	216,946		210,090
Accelerated depreciation	10,500
Construction in progress within property and equipment	252,900		306,000
External Customer [Member]
Segment Reporting Information [Line Items]
Revenues	466,996	472,538
Intersegment elimination [Member]
Segment Reporting Information [Line Items]
Revenues	4,827	7,552
Europe Caspian [Member]
Segment Reporting Information [Line Items]
Revenues	223,341	233,651
Total earnings from unconsolidated affiliates, net of losses - equity method investments	99	372
Total business unit operating income	14,197	42,195
Total depreciation and amortization	10,782	9,747
Total identifiable assets	1,194,126		972,163
Total investments in unconsolidated affiliates - equity method	183		65
Europe Caspian [Member] | External Customer [Member]
Segment Reporting Information [Line Items]
Revenues	222,949	230,256
Europe Caspian [Member] | Intersegment elimination [Member]
Segment Reporting Information [Line Items]
Revenues	392	3,395
Africa [Member]
Segment Reporting Information [Line Items]
Revenues	78,915	87,470
Total business unit operating income	12,952	17,626
Total depreciation and amortization	5,884	3,963
Total identifiable assets	425,913		484,514
Accelerated depreciation	2,300
Africa [Member] | External Customer [Member]
Segment Reporting Information [Line Items]
Revenues	78,915	87,470
Africa [Member] | Intersegment elimination [Member]
Segment Reporting Information [Line Items]
Revenues	0	0
Americas [Member]
Segment Reporting Information [Line Items]
Revenues	80,252	89,868
Total earnings from unconsolidated affiliates, net of losses - equity method investments	6,197	3,909
Total business unit operating income	16,532	26,658
Total depreciation and amortization	10,156	7,189
Total identifiable assets	900,638		966,538
Total investments in unconsolidated affiliates - equity method	216,763		210,025
Accelerated depreciation	2,900
Americas [Member] | External Customer [Member]
Segment Reporting Information [Line Items]
Revenues	76,600	86,354
Americas [Member] | Intersegment elimination [Member]
Segment Reporting Information [Line Items]
Revenues	3,652	3,514
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Revenues	80,388	59,556
Total business unit operating income	(688)	3,330
Total depreciation and amortization	8,319	4,240
Total identifiable assets	373,765		401,973
Accelerated depreciation	5,300
Asia Pacific [Member] | External Customer [Member]
Segment Reporting Information [Line Items]
Revenues	80,388	59,556
Asia Pacific [Member] | Intersegment elimination [Member]
Segment Reporting Information [Line Items]
Revenues	0	0
Corporate And other [Member]
Segment Reporting Information [Line Items]
Revenues	8,927	9,545
Total business unit operating income	(30,464)	(25,227)
Total depreciation and amortization	2,005	195
Total identifiable assets	348,249		$ 405,532
Corporate And other [Member] | External Customer [Member]
Segment Reporting Information [Line Items]
Revenues	8,144	8,902
Corporate And other [Member] | Intersegment elimination [Member]
Segment Reporting Information [Line Items]
Revenues	$ 783	$ 643