BASIC AND DILUTED EARNINGS PER COMMON SHARE - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Basic:
Income available to common shareholders	$ 14,216	$ 9,133	$ 29,818	$ 18,431
Average basic shares outstanding	43,151,248	37,549,804	41,626,356	36,626,290
Basic earnings per share	$ 0.33	$ 0.24	$ 0.72	$ 0.5
Diluted:
Income available to common shareholders	$ 14,216	$ 9,133	$ 29,818	$ 18,431
Average basic shares outstanding	43,151,248	37,549,804	41,626,356	36,626,290
Restricted stock and stock options	640,860	620,059	671,780	631,843
Average diluted shares outstanding	43,792,108	38,169,863	42,298,136	37,258,133
Diluted earnings per share	$ 0.32	$ 0.24	$ 0.7	$ 0.49