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LOAN LOSS ALLOWANCE - Loans by Credit Risk Rating (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Credit quality information
Total loans	$ 2,376,647	$ 1,129,064
Special mention
Credit quality information
Total loans	11,727	8,669
Non-accrual
Credit quality information
Total loans	5,303	2,733
Substandard
Credit quality information
Total loans	36,164	20,368
Total classified
Credit quality information
Total loans	41,467	23,101
Total Criticized
Credit quality information
Total loans	53,194	31,770
Business Activities Loans
Credit quality information
Total loans	1,263,938	1,129,064
Business Activities Loans | Special mention
Credit quality information
Total loans	9,294	8,669
Business Activities Loans | Non-accrual
Credit quality information
Total loans	4,601	2,733
Business Activities Loans | Substandard
Credit quality information
Total loans	26,113	20,368
Business Activities Loans | Total classified
Credit quality information
Total loans	30,714	23,101
Business Activities Loans | Total Criticized
Credit quality information
Total loans	40,008	31,770
Business Activities Loans | Commercial real estate
Credit quality information
Total loans	430,754	418,119
Business Activities Loans | Commercial real estate | Pass
Credit quality information
Total loans	406,723	391,663
Business Activities Loans | Commercial real estate | Special mention
Credit quality information
Total loans	6,911	5,868
Business Activities Loans | Commercial real estate | Substandard
Credit quality information
Total loans	17,120	20,588
Business Activities Loans | Commercial real estate | Construction and land development
Credit quality information
Total loans	27,428	14,695
Business Activities Loans | Commercial real estate | Construction and land development | Pass
Credit quality information
Total loans	26,762	14,695
Business Activities Loans | Commercial real estate | Construction and land development | Special mention
Credit quality information
Total loans	29	0
Business Activities Loans | Commercial real estate | Construction and land development | Substandard
Credit quality information
Total loans	637	0
Business Activities Loans | Commercial real estate | Other commercial real estate
Credit quality information
Total loans	403,326	403,424
Business Activities Loans | Commercial real estate | Other commercial real estate | Pass
Credit quality information
Total loans	379,961	376,968
Business Activities Loans | Commercial real estate | Other commercial real estate | Special mention
Credit quality information
Total loans	6,882	5,868
Business Activities Loans | Commercial real estate | Other commercial real estate | Substandard
Credit quality information
Total loans	16,483	20,588
Business Activities Loans | Commercial and industrial
Credit quality information
Total loans	228,151	151,240
Business Activities Loans | Commercial and industrial | Pass
Credit quality information
Total loans	223,747	145,926
Business Activities Loans | Commercial and industrial | Special mention
Credit quality information
Total loans	2,384	2,802
Business Activities Loans | Commercial and industrial | Substandard
Credit quality information
Total loans	2,023	2,512
Business Activities Loans | Commercial and industrial | Other Commercial
Credit quality information
Total loans	158,434	103,586
Business Activities Loans | Commercial and industrial | Other Commercial | Pass
Credit quality information
Total loans	154,639	98,968
Business Activities Loans | Commercial and industrial | Other Commercial | Special mention
Credit quality information
Total loans	2,036	2,384
Business Activities Loans | Commercial and industrial | Other Commercial | Substandard
Credit quality information
Total loans	1,759	2,234
Business Activities Loans | Commercial and industrial | Agricultural and other loans to farmers
Credit quality information
Total loans	31,459	31,808
Business Activities Loans | Commercial and industrial | Agricultural and other loans to farmers | Pass
Credit quality information
Total loans	31,014	31,279
Business Activities Loans | Commercial and industrial | Agricultural and other loans to farmers | Special mention
Credit quality information
Total loans	181	251
Business Activities Loans | Commercial and industrial | Agricultural and other loans to farmers | Substandard
Credit quality information
Total loans	264	278
Business Activities Loans | Commercial and industrial | Tax exempt
Credit quality information
Total loans	38,258	15,846
Business Activities Loans | Commercial and industrial | Tax exempt | Pass
Credit quality information
Total loans	38,091	15,679
Business Activities Loans | Commercial and industrial | Tax exempt | Special mention
Credit quality information
Total loans	167	167
Business Activities Loans | Commercial and industrial | Tax exempt | Substandard
Credit quality information
Total loans	0	0
Acquired Loans
Credit quality information
Total loans	1,112,709
Acquired Loans | Special mention
Credit quality information
Total loans	2,433	0
Acquired Loans | Non-accrual
Credit quality information
Total loans	702	0
Acquired Loans | Substandard
Credit quality information
Total loans	10,051	0
Acquired Loans | Total classified
Credit quality information
Total loans	10,753	0
Acquired Loans | Total Criticized
Credit quality information
Total loans	13,186	0
Acquired Loans | Commercial real estate
Credit quality information
Total loans	307,830	0
Acquired Loans | Commercial real estate | Pass
Credit quality information
Total loans	296,805	0
Acquired Loans | Commercial real estate | Special mention
Credit quality information
Total loans	1,558	0
Acquired Loans | Commercial real estate | Substandard
Credit quality information
Total loans	9,467	0
Acquired Loans | Commercial real estate | Construction and land development
Credit quality information
Total loans	16,467	0
Acquired Loans | Commercial real estate | Construction and land development | Pass
Credit quality information
Total loans	16,167	0
Acquired Loans | Commercial real estate | Construction and land development | Special mention
Credit quality information
Total loans	0	0
Acquired Loans | Commercial real estate | Construction and land development | Substandard
Credit quality information
Total loans	300	0
Acquired Loans | Commercial real estate | Other commercial real estate
Credit quality information
Total loans	291,363	0
Acquired Loans | Commercial real estate | Other commercial real estate | Pass
Credit quality information
Total loans	280,638	0
Acquired Loans | Commercial real estate | Other commercial real estate | Special mention
Credit quality information
Total loans	1,558	0
Acquired Loans | Commercial real estate | Other commercial real estate | Substandard
Credit quality information
Total loans	9,167	0
Acquired Loans | Commercial and industrial
Credit quality information
Total loans	121,851	0
Acquired Loans | Commercial and industrial | Pass
Credit quality information
Total loans	119,925	0
Acquired Loans | Commercial and industrial | Special mention
Credit quality information
Total loans	875	0
Acquired Loans | Commercial and industrial | Substandard
Credit quality information
Total loans	1,051	0
Acquired Loans | Commercial and industrial | Other Commercial
Credit quality information
Total loans	80,067	0
Acquired Loans | Commercial and industrial | Other Commercial | Pass
Credit quality information
Total loans	78,141	0
Acquired Loans | Commercial and industrial | Other Commercial | Special mention
Credit quality information
Total loans	875	0
Acquired Loans | Commercial and industrial | Other Commercial | Substandard
Credit quality information
Total loans	1,051	0
Acquired Loans | Commercial and industrial | Agricultural and other loans to farmers
Credit quality information
Total loans	0	0
Acquired Loans | Commercial and industrial | Agricultural and other loans to farmers | Pass
Credit quality information
Total loans	0	0
Acquired Loans | Commercial and industrial | Agricultural and other loans to farmers | Special mention
Credit quality information
Total loans	0	0
Acquired Loans | Commercial and industrial | Agricultural and other loans to farmers | Substandard
Credit quality information
Total loans	0	0
Acquired Loans | Commercial and industrial | Tax exempt
Credit quality information
Total loans	41,784	0
Acquired Loans | Commercial and industrial | Tax exempt | Pass
Credit quality information
Total loans	41,784	0
Acquired Loans | Commercial and industrial | Tax exempt | Special mention
Credit quality information
Total loans	0	0
Acquired Loans | Commercial and industrial | Tax exempt | Substandard
Credit quality information
Total loans	$ 0	$ 0

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5074-111524

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