EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Numerator:
Net income	$ 48,734	$ 10,591
Less: Preferred dividends	4,147	4,147
Allocation to participating securities	29	21
Attributable to non-controlling interest	249	57
Net income attributable to common stockholders, net of amount allocated to participating securities	$ 44,309	$ 6,366
Denominator:
Weighted average common shares outstanding - basic	86,360,000	85,704,000
Dilutive effect of equity-based compensation awards	810,000	1,171,000
Weighted average common shares outstanding - diluted	87,170,000	86,875,000
Earnings per share:
Basic and diluted net income per share (in dollars per share)	$ 0.51	$ 0.07