GOODWILL AND INTANGIBLE ASSETS (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Mar. 11, 2016	Jun. 12, 2015
Goodwill And Core Deposit Intangibles [Line Items]
Goodwill, Acquired During Period	$ 35,485,000	$ 25,880,000
Goodwill	125,532,000	90,082,000	$ 63,547,000
Amortization of Intangible Assets	4,376,000	3,741,000	2,330,000
Finite-Lived Intangible Assets, Net, Total	17,428,000	17,058,000
Goodwill, Other Increase (Decrease)	$ (35,000)	655,000
Maximum [Member]
Goodwill And Core Deposit Intangibles [Line Items]
Core Deposits Intangibles Amortization Period	10 years
Minimum [Member]
Goodwill And Core Deposit Intangibles [Line Items]
Core Deposits Intangibles Amortization Period	7 years
Coastal Bank share Inc [Member]
Goodwill And Core Deposit Intangibles [Line Items]
Goodwill			$ 28,093,000
Goodwill, Other Increase (Decrease)		655,000
Bank Of America [Member]
Goodwill And Core Deposit Intangibles [Line Items]
Goodwill, Acquired During Period		11,210,000
Goodwill					$ 0
Finite Lived Intangible Asset Acquired During Period		8,636,000
Merchants [Member]
Goodwill And Core Deposit Intangibles [Line Items]
Goodwill, Acquired During Period		14,670,000
Goodwill		14,634,000
Finite Lived Intangible Asset Acquired During Period		$ 3,943,000
Goodwill, Other Increase (Decrease)	$ (35,000)
Jacksonville Bancorp, Inc [Member]
Goodwill And Core Deposit Intangibles [Line Items]
Goodwill, Acquired During Period	35,485,000
Goodwill				$ 0
Finite Lived Intangible Asset Acquired During Period	$ 4,746,000