ACQUISITIONS - Granite (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016	Jul. 29, 2016	Dec. 31, 2015
Acquisitions
Goodwill	$ 86,283	$ 86,283		$ 82,801
Granite
Acquisitions
Accounts receivable, net			$ 1,024
Prepaid expenses			22
Other assets			25
Premises and equipment, net			299
Non-compete agreements			100
Trademarks and trade names			100
Customer relationships			3,400
Goodwill			4,827
Assets acquired			9,797
Accounts payable and accrued expenses			(57)
Other current liabilities			(192)
Purchase price			$ 9,548