INVESTMENT SECURITIES - Summary of Unrealized Losses - Held-to-Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Schedule of Held-to-maturity Securities [Line Items]
Securities with losses under 12 months, Fair Value	$ 541	$ 19,360
Securities with losses under 12 months, Gross Unrealized Loss	1	208
Securities with losses over 12 months, Fair Value	17,968	33,635
Securities with losses over 12 months, Gross Unrealized Loss	497	800
Total, Fair Value	18,509	52,995
Total, Gross Unrealized Loss	498	1,008
Obligations of state and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Securities with losses under 12 months, Fair Value	541	11,761
Securities with losses under 12 months, Gross Unrealized Loss	1	35
Securities with losses over 12 months, Fair Value	505	13,263
Securities with losses over 12 months, Gross Unrealized Loss	5	157
Total, Fair Value	1,046	25,024
Total, Gross Unrealized Loss	6	192
GSE mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Securities with losses under 12 months, Fair Value	0	0
Securities with losses under 12 months, Gross Unrealized Loss	0	0
Securities with losses over 12 months, Fair Value	7,021	8,142
Securities with losses over 12 months, Gross Unrealized Loss	131	164
Total, Fair Value	7,021	8,142
Total, Gross Unrealized Loss	131	164
Collateralized mortgage obligations: residential
Schedule of Held-to-maturity Securities [Line Items]
Securities with losses under 12 months, Fair Value	0	0
Securities with losses under 12 months, Gross Unrealized Loss	0	0
Securities with losses over 12 months, Fair Value	10,442	12,230
Securities with losses over 12 months, Gross Unrealized Loss	361	479
Total, Fair Value	10,442	12,230
Total, Gross Unrealized Loss	$ 361	479
Collateralized mortgage obligations: commercial
Schedule of Held-to-maturity Securities [Line Items]
Securities with losses under 12 months, Fair Value		7,599
Securities with losses under 12 months, Gross Unrealized Loss		173
Securities with losses over 12 months, Fair Value		0
Securities with losses over 12 months, Gross Unrealized Loss		0
Total, Fair Value		7,599
Total, Gross Unrealized Loss		$ 173