Earnings/(Loss) Per Share (EPS) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Numerator:
Net income/(loss)	$ 29,425,391	$ 35,628,912	$ 40,711,896	$ 6,075,059	$ (15,953,575)	$ (6,218,652)	$ (8,177,120)	$ (20,596,558)	$ 111,841,258	$ (50,945,905)	$ (20,400,686)
Denominator:
Basic weighted average number of common shares outstanding (in shares)									53,881,483	54,513,118	54,039,886
Effect of dilutive restricted stock and restricted stock units (in shares)									233,855
Diluted weighted average number of common shares outstanding (in shares)									54,115,338	54,513,118	54,039,886
EPS:
Earnings/(loss) per common share – basic (in dollars per share)	$ 0.56	$ 0.66	$ 0.75	$ 0.11	$ (0.29)	$ (0.11)	$ (0.15)	$ (0.38)	$ 2.08	$ (0.93)	$ (0.38)
Earnings/(loss) per common share – diluted (in dollars per share)	$ 0.56	$ 0.66	$ 0.74	$ 0.11	$ (0.29)	$ (0.11)	$ (0.15)	$ (0.38)	$ 2.07	$ (0.93)	$ (0.38)
Restricted stock awards
EPS:
Number of shares excluded from the calculation of diluted EPS									0	641,013	918,334