INVESTMENT SECURITIES - Portfolio of Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Held-to-maturity:
Amortized Cost	$ 116,792	$ 141,201
Gross Unrealized Gains	1,404	1,400
Gross Unrealized Losses	498	1,008
Fair Value	117,698	141,593
Obligations of state and political subdivisions
Held-to-maturity:
Amortized Cost	43,737	45,914
Gross Unrealized Gains	697	267
Gross Unrealized Losses	6	192
Fair Value	44,428	45,989
GSE mortgage-backed securities
Held-to-maturity:
Amortized Cost	55,696	67,268
Gross Unrealized Gains	705	1,080
Gross Unrealized Losses	131	164
Fair Value	56,270	68,184
Collateralized mortgage obligations: residential
Held-to-maturity:
Amortized Cost	10,803	12,709
Gross Unrealized Gains	0	0
Gross Unrealized Losses	361	479
Fair Value	10,442	12,230
Collateralized mortgage obligations: commercial
Held-to-maturity:
Amortized Cost	6,556	15,310
Gross Unrealized Gains	2	53
Gross Unrealized Losses	0	173
Fair Value	$ 6,558	$ 15,190

Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.1)
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.6)
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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