MERGERS AND ACQUISITIONS - Pro Forma Results (Details) (East Carolina Bancorp [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012
East Carolina Bancorp [Member]
Business Acquisition [Line Items]
Net interest income	$ 19,069	$ 58,295	$ 56,568
Net income (loss)	3,921	(3,768)	7,995
Net income (loss) available to common stockholders	$ 3,287	$ (5,815)	$ 6,098
Basic income (loss) per common share (in dollars per share)	$ 0.07	$ (0.13)	$ 0.13
Diluted income (loss) per common share (in dollars per share)	$ 0.07	$ (0.13)	$ 0.13
Weighted average basic common shares outstanding (in shares)	$ 45,842,851	$ 45,938,197	$ 45,816,088
Weighted average diluted common shares outstanding (in shares)	$ 46,046,923	$ 45,938,197	$ 45,958,767