LOANS AND ALLOWANCE FOR LOAN AND LEASE LOSSES - TDR ACCRUAL STATUS (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2017 USD ($) loan	Dec. 31, 2016 USD ($) loan
Troubled Debt Restructurings disclosures
Number of Loans | loan	288	308
Recorded Investment | $	$ 36,718	$ 41,586
Residential Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	264	277
Recorded Investment | $	$ 27,415	$ 28,753
Commercial Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	18	23
Recorded Investment | $	$ 8,361	$ 11,265
Construction & land development
Troubled Debt Restructurings disclosures
Number of Loans | loan	4	5
Recorded Investment | $	$ 749	$ 881
Commercial & Industrial
Troubled Debt Restructurings disclosures
Number of Loans | loan	2	3
Recorded Investment | $	$ 193	$ 687
Loans on nonaccrual status
Troubled Debt Restructurings disclosures
Minimum period for which TDRs continue to be reported as non-performing loans	6 months
Number of Loans | loan	74	87
Recorded Investment | $	$ 8,280	$ 9,860
Loans on nonaccrual status | Residential Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	66	79
Recorded Investment | $	$ 5,733	$ 7,199
Loans on nonaccrual status | Commercial Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	6	6
Recorded Investment | $	$ 2,327	$ 2,430
Loans on nonaccrual status | Construction & land development
Troubled Debt Restructurings disclosures
Number of Loans | loan	1	1
Recorded Investment | $	$ 71	$ 77
Loans on nonaccrual status | Commercial & Industrial
Troubled Debt Restructurings disclosures
Number of Loans | loan	1	1
Recorded Investment | $	$ 149	$ 154
Accrual Loans
Troubled Debt Restructurings disclosures
Number of Loans | loan	214	221
Recorded Investment | $	$ 28,438	$ 31,726
Accrual Loans | Residential Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	198	198
Recorded Investment | $	$ 21,682	$ 21,554
Accrual Loans | Commercial Real Estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	12	17
Recorded Investment | $	$ 6,034	$ 8,835
Accrual Loans | Construction & land development
Troubled Debt Restructurings disclosures
Number of Loans | loan	3	4
Recorded Investment | $	$ 678	$ 804
Accrual Loans | Commercial & Industrial
Troubled Debt Restructurings disclosures
Number of Loans | loan	1	2
Recorded Investment | $	$ 44	$ 533