BUSINESS COMBINATIONS (Details 3) - Coastal Bankshares, Inc. [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net interest income and noninterest income	$ 72,377	$ 60,613	$ 195,685	$ 177,067
Net income (loss)	15,627	12,798	26,366	29,961
Net income (loss) available to common stockholders	$ 15,627	$ 12,798	$ 26,366	$ 29,675
Income (loss) per common share available to common stockholders - basic	$ 0.49	$ 0.48	$ 0.83	$ 1.09
Income (loss) per common share available to common stockholders - diluted	$ 0.48	$ 0.47	$ 0.82	$ 1.07
Average number of shares outstanding, basic	32,195	26,773	31,614	27,304
Average number of shares outstanding, diluted	32,553	27,161	31,962	27,698