CALCULATION OF EARNINGS PER COMMON SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
NET INCOME AVAILABLE TO COMMON SHAREHOLDERS													$ 85,385	$ 45,222	$ 54,070
Weighted average number of common shares outstanding
Basic weighted average shares outstanding (in shares)													33,820,148	23,801,373	19,359,409
Diluted weighted shares outstanding (in shares)													33,853,511	23,866,621	19,402,656
Earnings per common share
Basic (in dollars per share)	$ 0.69	$ 0.70	$ 0.62	$ 0.52	$ 0.20	$ 0.62	$ 0.64	$ 0.61	$ 0.60	$ 0.76	$ 0.88	$ 0.55	$ 2.52	$ 1.90	$ 2.79
Diluted (in dollars per share)	$ 0.69	$ 0.70	$ 0.61	$ 0.52	$ 0.20	$ 0.62	$ 0.64	$ 0.61	$ 0.60	$ 0.76	$ 0.88	$ 0.54	$ 2.52	$ 1.89	$ 2.79