PROPERTY AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Mar. 31, 2015
Property, Plant and Equipment [Line Items]
Cost	$ 303,305		$ 303,305		$ 283,367
Accumulated depreciation	87,290		87,290		77,091
Property and equipment, net	216,015		216,015		206,276
Interest Costs Capitalized	446	$ 343	1,161	$ 411	734
Vessels [Member]
Property, Plant and Equipment [Line Items]
Cost	299,649		299,649		279,785
Accumulated depreciation	84,877		84,877		74,794
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	96		96		102
Accumulated depreciation	83		83		78
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	548		548		563
Accumulated depreciation	318		318		283
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Cost	15		15		16
Accumulated depreciation	12		12		13
Computer, communication equipment and purchased software [Member]
Property, Plant and Equipment [Line Items]
Cost	2,997		2,997		2,901
Accumulated depreciation	$ 2,000		$ 2,000		$ 1,923