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SUBORDINATED DEBENTURES (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) subsidiary	Dec. 31, 2018 USD ($)
SUBORDINATED DEBENTURES
Number of subsidiary business trusts | subsidiary	5
Subordinated debentures	$ 37,583	$ 37,517
Heartland Bancorp, Inc. Capital Trust B
SUBORDINATED DEBENTURES
Subordinated debentures	10,310	10,310
Heartland Bancorp, Inc. Capital Trust C
SUBORDINATED DEBENTURES
Subordinated debentures	10,310	10,310
Heartland Bancorp, Inc. Capital Trust D
SUBORDINATED DEBENTURES
Subordinated debentures	5,155	5,155
FFBI Capital Trust I
SUBORDINATED DEBENTURES
Subordinated debentures	7,217	7,217
National Bancorp Statutory Trust I
SUBORDINATED DEBENTURES
Subordinated debentures	$ 4,591	$ 4,525

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+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(19))
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-Name Accounting Standards Codification
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-Section S99
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-Subparagraph (SX 210.9-03(16))
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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