SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Net income available to common shareholders	$ 72,100	$ 40,847	$ 38,437
Weighted average number of common shares outstanding	34,347	31,762	25,974
Effect of dilutive stock options	108	121	270
Effect of dilutive restricted stock awards	247	244	15
Weighted average number of common shares outstanding used to calculate diluted earnings per share	34,702	32,127	26,259