SECURITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 824,635	$ 778,261
Gross Unrealized Gains	5,493	8,136
Gross Unrealized Losses	(7,393)	(3,212)
Fair Value	822,735	783,185
U.S. government sponsored agencies [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	999	14,959
Gross Unrealized Gains	21	0
Gross Unrealized Losses	0	(69)
Fair Value	1,020	14,890
State, county and municipal securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	149,899	157,681
Gross Unrealized Gains	2,605	4,046
Gross Unrealized Losses	(469)	(411)
Fair Value	152,035	161,316
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	32,375	5,900
Gross Unrealized Gains	167	145
Gross Unrealized Losses	(370)	(28)
Fair Value	32,172	6,017
Mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	641,362	599,721
Gross Unrealized Gains	2,700	3,945
Gross Unrealized Losses	(6,554)	(2,704)
Fair Value	$ 637,508	$ 600,962

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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