PROPERTY AND EQUIPMENT, NET (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016
Property, Plant and Equipment [Line Items]
Cost	$ 318,815			$ 318,815		$ 323,566
Accumulated depreciation	107,545			107,545		95,062
Property and equipment, net	211,270			211,270		228,504
Interest Costs Capitalized	0		$ 446	0	$ 1,161	1,161
Asset Impairment Charges	0	$ 1,872	0	1,872	0
Operating Income for Retired Vessel	0		$ 302	0	$ (32)
Vessels [Member]
Property, Plant and Equipment [Line Items]
Cost	314,792			314,792		319,689
Accumulated depreciation	104,738			104,738		92,482
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Cost	103			103		88
Accumulated depreciation	65			65		58
Furniture and equipment [Member]
Property, Plant and Equipment [Line Items]
Cost	586			586		588
Accumulated depreciation	389			389		351
Vehicles [Member]
Property, Plant and Equipment [Line Items]
Cost	15			15		16
Accumulated depreciation	13			13		13
Computer, communication equipment and purchased software [Member]
Property, Plant and Equipment [Line Items]
Cost	3,319			3,319		3,185
Accumulated depreciation	$ 2,340			$ 2,340		$ 2,158