EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
EARNINGS PER SHARE
Net Income	$ 8,851	$ 7,890	$ 26,331	$ 13,116
Dividends paid on and earnings allocated to participating securities	(188)	(149)	(542)	(295)
Income attributable to common stock	$ 8,663	$ 7,741	$ 25,789	$ 12,821
Weighted average common shares outstanding, including participating securities	17,537	17,426	17,511	13,901
Weighted average participating securities (in shares)	(372)	(330)	(365)	(315)
Weighted average common shares outstanding	17,165	17,096	17,146	13,586
Basic earnings per common share (in dollars per share)	$ 0.50	$ 0.45	$ 1.50	$ 0.94
Income attributable to common stock	$ 8,663	$ 7,741	$ 25,789	$ 12,821
Impact of assumed conversions - interest on 8.5% trust preferred securities	219		661
Income attributable to common stock including assumed conversions	$ 8,882	$ 7,741	$ 26,450	$ 12,821
Weighted average common shares outstanding	17,165	17,096	17,146	13,586
Incremental shares from assumed conversions of options and restricted stock units	15	6	11	4
Incremental shares from assumed conversions of 8.5% trust preferred securities	546		531
Weighted average common and equivalent shares outstanding	17,726	17,102	17,688	13,590
Diluted earnings per common share (in dollars per share)	$ 0.50	$ 0.45	$ 1.50	$ 0.94