SECURITIES - Summary of Available For Sale Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Information related to available for sale securities
Amortized Cost	$ 697,906	$ 591,009
Gross Unrealized Gain	37,045	17,841
Gross Unrealized Losses	(106)	(617)
Fair Value	734,845	608,233
U.S. government sponsored agencies
Information related to available for sale securities
Amortized Cost	36,492
Gross Unrealized Gain	56
Gross Unrealized Losses	(61)
Fair Value	36,487
Mortgage-backed securities residential [Member]
Information related to available for sale securities
Amortized Cost	270,231	283,817
Gross Unrealized Gain	9,289	4,751
Gross Unrealized Losses	(17)	(387)
Fair Value	279,503	288,181
Mortgage-backed securities commercial [Member]
Information related to available for sale securities
Amortized Cost	35,877	36,712
Gross Unrealized Gain	1,004	262
Gross Unrealized Losses	0	(2)
Fair Value	36,881	36,972
State and Municipal Securities [Member]
Information related to available for sale securities
Amortized Cost	355,306	270,480
Gross Unrealized Gain	26,696	12,828
Gross Unrealized Losses	(28)	(228)
Fair Value	$ 381,974	$ 283,080

Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, including portion attributable to noncontrolling interest. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
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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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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
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