LOANS AND LEASES - Additional Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Provision for loan and lease losses covered	$ (1,041,000)	$ 277,000	$ (2,155,000)	$ 197,000
Restructured Loans, Nonaccrual Status	9,400,000		9,400,000			$ 5,100,000
Write-downs	172,000	42,000	281,000	230,000
Gain (loss) on sale of other real estate owned	(162,000)	(43,000)	(186,000)	147,000
Real Estate Acquired Through Foreclosure	5,961,000	10,031,000	5,961,000	10,031,000	$ 5,300,000	6,284,000	$ 11,939,000	$ 13,254,000
FDIC indemnification asset	9,600,000		9,600,000			$ 12,000,000
Covered Loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Real Estate Acquired Through Foreclosure	700,000	100,000	700,000	100,000
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum			250,000
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum			100,000
Write-downs	$ 56,000	$ 13,000	$ 119,000	$ 84,000