Commitments and Contingencies (Details) (USD $)	6 Months Ended
Sep. 30, 2014 item
Commitments and Contingencies
Number of commitments under shipbuilding contracts and supervision agreements for VLGC newbuildings	17
Commitments under newbuilding contracts
Twelve months ended September 30, 2015	$ 697,068,483
Twelve months ended September 30, 2016	297,618,068
Total	$ 994,686,551

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

No definition available.

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant