EARNINGS PER SHARE (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income	$ 4,033,321	$ 4,424,609	$ (1,097,005)	$ 1,883,335
Less dividends paid:
Common stock	5,520,281	4,008,469	11,039,813	7,191,938
Unvested share-based payment awards	870,726	635,923	1,751,235	1,116,495
Dividends	6,391,007	4,644,392	12,791,048	8,308,433
Undistributed earnings	$ (2,357,686)	$ (219,783)	(13,888,053)	$ (6,425,098)
Common Stock [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income			0
Less dividends paid:
Common stock			$ 0
Distributed earnings (in dollars per share)	$ 0.38	$ 0.36	$ 0.75	$ 0.72
Undistributed earnings (deficit) (in dollars per share)	(0.17)	(0.02)	(0.94)	(0.64)
Effect of dilutive securities:
Total (in dollars per share)	0.21	0.34	(0.19)	0.08
Unvested Share Based Payment Awards [Member]
Less dividends paid:
Distributed earnings (in dollars per share)	0.38	0.36	0.75	0.72
Undistributed earnings (deficit) (in dollars per share)	(0.17)	(0.02)	(0.94)	(0.64)
Effect of dilutive securities:
Total (in dollars per share)	$ 0.21	$ 0.34	$ (0.19)	$ 0.08