LOANS - Troubled debt restructurings (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($) Integer	Dec. 31, 2015 USD ($) Integer
Business Activities Loans - Residential real estate
Quantity of troubled debt restructurings | Integer	4	3
Pre-modification balance	$ 684	$ 1,071
Post-modification balance	$ 684	$ 1,071
Business Activities Loans - Land
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Business Activities Loans - Commercial real estate
Quantity of troubled debt restructurings | Integer	2	1
Pre-modification balance	$ 2,123	$ 294
Post-modification balance	$ 2,123	$ 294
Business Activities Loans - Construction of commercial
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Business Activities Loans - Consumer
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Business Activities Loans - Commercial and industrial
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Business Activities Loans - HELOC
Quantity of troubled debt restructurings | Integer		1
Pre-modification balance		$ 35
Post-modification balance		$ 35
Business Activities Loans - Total Troubled debt restructurings
Quantity of troubled debt restructurings | Integer	6	5
Pre-modification balance	$ 2,807	$ 1,400
Post-modification balance	$ 2,807	$ 1,400
Business Activities Loans - Rate reduction and term extension
Quantity of troubled debt restructurings | Integer	1	1
Pre-modification balance	$ 174	$ 294
Post-modification balance	$ 174	$ 294
Business Activities Loans - Debt consolidation and term extension
Quantity of troubled debt restructurings | Integer	1	1
Pre-modification balance	$ 260	$ 148
Post-modification balance	$ 260	$ 148
Business Activities Loans - Debt consolidation
Quantity of troubled debt restructurings | Integer	1
Pre-modification balance	$ 1,863
Post-modification balance	$ 1,863
Business Activities Loans - Debt consolidation, rate reduction, term extension and note bifurcation
Quantity of troubled debt restructurings | Integer		1
Pre-modification balance		$ 48
Post-modification balance		$ 48
Business Activities Loans - Term extension
Quantity of troubled debt restructurings | Integer	3	2
Pre-modification balance	$ 510	$ 910
Post-modification balance	$ 510	$ 910
Acquired Loans - Residential real estate
Quantity of troubled debt restructurings | Integer	1
Pre-modification balance	$ 88
Post-modification balance	$ 88
Acquired Loans - Land
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - Commercial real estate
Quantity of troubled debt restructurings | Integer		1
Pre-modification balance		$ 184
Post-modification balance		$ 184
Acquired Loans - Construction of commercial
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - Consumer
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - Commercial and industrial
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - HELOC
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - Total Troubled debt restructurings
Quantity of troubled debt restructurings | Integer	1	1
Pre-modification balance	$ 88	$ 184
Post-modification balance	$ 88	$ 184
Acquired Loans - Rate reduction and term extension
Quantity of troubled debt restructurings | Integer	1	1
Pre-modification balance	$ 88	$ 184
Post-modification balance	$ 88	$ 184
Acquired Loans - Debt consolidation and term extension
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - Debt consolidation
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - Debt consolidation, rate reduction, term extension and note bifurcation
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - Term extension
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance