Significant Accounting Policies (AcctPro) (Details) - USD ($)	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred charges, net	$ (1,884,174)	$ (294,935)	$ (669,705)
Total assets	(1,746,234,880)	(1,842,178,176)
Long-term debt—net of current portion and deferred financing fees	(683,985,463)	(746,354,613)
Total long-term liabilities	(684,468,148)	(768,450,566)
Presentation of debt issuance costs
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Deferred charges, net	20,100,000	23,700,000
Total assets	20,100,000	23,700,000
Long-term debt—net of current portion and deferred financing fees	20,100,000	23,700,000
Total long-term liabilities	$ 20,100,000	$ 23,700,000