Long-Term Debt (Details)	9 Months Ended
	Dec. 31, 2015 USD ($) item	Mar. 31, 2015 USD ($)
Long-Term Debt
Drawdowns	$ 634,648,196
Financing costs paid	13,210,445
Presented as follows:
Current portion of long-term debt	65,708,060	$ 15,677,553
Long-term debt-net of current portion	748,344,288	184,665,874
Total	814,052,348	200,343,427
Royal Bank of Scotland plc (RBS)
Presented as follows:
Total	113,022,000	119,106,500
Tranche A
Presented as follows:
Total	39,100,000	40,800,000
Tranche B
Presented as follows:
Total	28,127,000	30,684,000
Tranche C
Presented as follows:
Total	45,795,000	47,622,500
2015 Debt Facility
Long-Term Debt
Drawdowns	634,600,000
Financing costs paid	$ 9,000,000
Number of VLGC newbuildings secured by loan | item	15
Number of tranches in which loan facility is divided | item	4
Balance available to be drawn	$ 42,200,000
Presented as follows:
Total	701,030,348	81,236,927
Commercial Financing
Presented as follows:
Total	231,599,393	26,695,381
KEXIM Direct Financing
Presented as follows:
Total	188,405,793	21,890,212
KEXIM Guaranteed
Presented as follows:
Total	186,383,877	21,655,293
K-sure Insured
Presented as follows:
Total	$ 94,641,285	$ 10,996,041