LOANS - Troubled debt restructurings (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2016 USD ($) Integer	Jun. 30, 2015 USD ($) Integer
Business Activities Loans - Residential real estate
Quantity of troubled debt restructurings | Integer	3	1
Pre-modification balance	$ 316	$ 875
Post-modification balance	$ 316	$ 875
Business Activities Loans - Commercial real estate
Quantity of troubled debt restructurings | Integer	1	1
Pre-modification balance	$ 1,863	$ 184
Post-modification balance	$ 1,863	$ 184
Business Activities Loans - Home equity lines of credit
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Business Activities Loans - Troubled debt restructurings
Quantity of troubled debt restructurings | Integer	4	2
Pre-modification balance	$ 2,179	$ 1,059
Post-modification balance	$ 2,179	$ 1,059
Rate reduction and term extension
Quantity of troubled debt restructurings | Integer	2	1
Pre-modification balance	$ 262	$ 184
Post-modification balance	$ 262	$ 184
Interest only and term extension
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Interest only
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Debt consolidation
Quantity of troubled debt restructurings | Integer	1
Pre-modification balance	$ 1,863
Post-modification balance	$ 1,863
Term extension
Quantity of troubled debt restructurings | Integer	1	1
Pre-modification balance	$ 54	$ 875
Post-modification balance	$ 54	$ 857
Acquired Loans - Residential real estate
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - Commercial real estate
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - Home equity lines of credit
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Acquired Loans - Troubled debt restructurings
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Rate reduction and term extension
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Interest only and term extension
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Interest only
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Debt consolidation and term extension
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Term extension
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance