Earnings/(Loss) Per Share (EPS) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net income/(loss)	$ 1,955,240	$ 5,039,624	$ (7,145,558)	$ (1,291,121)	$ 20,160,912	$ 54,661,323	$ 41,213,264	$ 13,652,883	$ (1,441,815)	$ 129,688,382	$ 25,260,782
Denominator:
Basic weighted average number of common shares outstanding (in shares)									54,079,139	56,657,570	56,183,707
Effect of dilutive restricted stock (in shares)										49,524
Diluted weighted average number of common shares outstanding (in shares)									54,079,139	56,707,094	56,183,707
EPS:
Earnings/(loss) per common share – basic (in dollars per share)									$ (0.03)	$ 2.29	$ 0.45
Earnings/(loss) per common share – diluted (in dollars per share)									$ (0.03)	$ 2.29	$ 0.45
Restricted stock awards
EPS:
Number of shares excluded from the calculation of diluted EPS									1,114,625	655,000	0