LOANS AND LEASES - Changes in Other Real Estate Owned (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Balance at beginning of period	$ 1,853	$ 5,961	$ 2,781	$ 6,284
Additions	818	1,794	2,992	4,044
Disposals	(298)	(4,505)	(3,138)	(6,797)
Write-downs	455	134	717	415
Balance at end of period	1,918	3,116	1,918	3,116
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additions	79	1,559	1,269	1,731
Disposals	(181)	(3,684)	(2,611)	(5,291)
Write-downs	258	102	355	264
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Additions	739	235	1,723	2,313
Disposals	(117)	(821)	(527)	(1,506)
Write-downs	$ 197	$ 32	$ 362	$ 151