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ALLOWANCE FOR LOAN LOSSES - Loans by Credit Risk Rating (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Credit quality information
Loans	$ 2,578,238	$ 2,490,227
Special mention
Credit quality information
Loans	33,685	21,736
Substandard
Credit quality information
Loans	20,200	15,797
Doubtful
Credit quality information
Loans	0	0
Non-accrual
Credit quality information
Loans	15,955	18,235
Total classified
Credit quality information
Loans	36,155	34,032
Total Criticized
Credit quality information
Loans	69,840	55,768
Business Activities Loans
Credit quality information
Loans	1,785,247	1,630,897
Business Activities Loans | Commercial real estate
Credit quality information
Loans	649,267	579,734
Business Activities Loans | Commercial real estate | Construction and land development
Credit quality information
Loans	33,524	23,754
Business Activities Loans | Commercial real estate | Commercial real estate other
Credit quality information
Loans	615,743	555,980
Business Activities Loans | Commercial and industrial
Credit quality information
Loans	333,536	313,662
Business Activities Loans | Commercial and industrial | Commercial
Credit quality information
Loans	244,515	234,757
Business Activities Loans | Commercial and industrial | Agricultural
Credit quality information
Loans	21,647	22,317
Business Activities Loans | Commercial and industrial | Tax exempt loans
Credit quality information
Loans	67,374	56,588
Business Activities Loans | Residential mortgages
Credit quality information
Loans	731,443	670,189
Business Activities Loans | Residential mortgages | Residential real estate
Credit quality information
Loans	731,443	670,189
Business Activities Loans | Total residential real estate and consumer
Credit quality information
Total Performing and Nonperforming Loans	802,444	737,501
Business Activities Loans | Total residential real estate and consumer | Residential real estate
Credit quality information
Total Performing and Nonperforming Loans	731,443	670,189
Business Activities Loans | Total residential real estate and consumer | Home equity
Credit quality information
Total Performing and Nonperforming Loans	60,323	57,898
Business Activities Loans | Total residential real estate and consumer | Other consumer
Credit quality information
Total Performing and Nonperforming Loans	10,678	9,414
Business Activities Loans | Consumer
Credit quality information
Loans	71,001	67,312
Business Activities Loans | Consumer | Home equity
Credit quality information
Loans	60,323	57,898
Business Activities Loans | Consumer | Other consumer
Credit quality information
Loans	10,678	9,414
Business Activities Loans | Performing | Total residential real estate and consumer
Credit quality information
Total Performing and Nonperforming Loans	797,754	732,952
Business Activities Loans | Performing | Total residential real estate and consumer | Residential real estate
Credit quality information
Total Performing and Nonperforming Loans	727,420	665,976
Business Activities Loans | Performing | Total residential real estate and consumer | Home equity
Credit quality information
Total Performing and Nonperforming Loans	59,738	57,652
Business Activities Loans | Performing | Total residential real estate and consumer | Other consumer
Credit quality information
Total Performing and Nonperforming Loans	10,596	9,324
Business Activities Loans | Nonperforming | Total residential real estate and consumer
Credit quality information
Total Performing and Nonperforming Loans	4,690	4,549
Business Activities Loans | Nonperforming | Total residential real estate and consumer | Residential real estate
Credit quality information
Total Performing and Nonperforming Loans	4,023	4,213
Business Activities Loans | Nonperforming | Total residential real estate and consumer | Home equity
Credit quality information
Total Performing and Nonperforming Loans	585	246
Business Activities Loans | Nonperforming | Total residential real estate and consumer | Other consumer
Credit quality information
Total Performing and Nonperforming Loans	82	90
Business Activities Loans | Pass | Commercial real estate
Credit quality information
Loans	623,376	556,066
Business Activities Loans | Pass | Commercial real estate | Construction and land development
Credit quality information
Loans	33,450	23,680
Business Activities Loans | Pass | Commercial real estate | Commercial real estate other
Credit quality information
Loans	589,926	532,386
Business Activities Loans | Pass | Commercial and industrial
Credit quality information
Loans	313,530	304,621
Business Activities Loans | Pass | Commercial and industrial | Commercial
Credit quality information
Loans	225,251	226,353
Business Activities Loans | Pass | Commercial and industrial | Agricultural
Credit quality information
Loans	20,905	21,680
Business Activities Loans | Pass | Commercial and industrial | Tax exempt loans
Credit quality information
Loans	67,374	56,588
Business Activities Loans | Special mention
Credit quality information
Loans	25,902	15,337
Business Activities Loans | Special mention | Commercial real estate
Credit quality information
Loans	12,032	8,392
Business Activities Loans | Special mention | Commercial real estate | Construction and land development
Credit quality information
Loans	73	73
Business Activities Loans | Special mention | Commercial real estate | Commercial real estate other
Credit quality information
Loans	11,959	8,319
Business Activities Loans | Special mention | Commercial and industrial
Credit quality information
Loans	13,870	6,945
Business Activities Loans | Special mention | Commercial and industrial | Commercial
Credit quality information
Loans	13,512	6,730
Business Activities Loans | Special mention | Commercial and industrial | Agricultural
Credit quality information
Loans	358	215
Business Activities Loans | Special mention | Commercial and industrial | Tax exempt loans
Credit quality information
Loans	0	0
Business Activities Loans | Substandard
Credit quality information
Loans	11,799	7,810
Business Activities Loans | Substandard | Commercial real estate
Credit quality information
Loans	12,337	13,914
Business Activities Loans | Substandard | Commercial real estate | Construction and land development
Credit quality information
Loans	0	0
Business Activities Loans | Substandard | Commercial real estate | Commercial real estate other
Credit quality information
Loans	12,337	13,914
Business Activities Loans | Substandard | Commercial and industrial
Credit quality information
Loans	5,421	1,346
Business Activities Loans | Substandard | Commercial and industrial | Commercial
Credit quality information
Loans	5,037	924
Business Activities Loans | Substandard | Commercial and industrial | Agricultural
Credit quality information
Loans	384	422
Business Activities Loans | Substandard | Commercial and industrial | Tax exempt loans
Credit quality information
Loans	0	0
Business Activities Loans | Doubtful
Credit quality information
Loans	0	0
Business Activities Loans | Doubtful | Commercial real estate
Credit quality information
Loans	1,522	1,362
Business Activities Loans | Doubtful | Commercial real estate | Construction and land development
Credit quality information
Loans	1	1
Business Activities Loans | Doubtful | Commercial real estate | Commercial real estate other
Credit quality information
Loans	1,521	1,361
Business Activities Loans | Doubtful | Commercial and industrial
Credit quality information
Loans	715	750
Business Activities Loans | Doubtful | Commercial and industrial | Commercial
Credit quality information
Loans	715	750
Business Activities Loans | Doubtful | Commercial and industrial | Agricultural
Credit quality information
Loans	0	0
Business Activities Loans | Doubtful | Commercial and industrial | Tax exempt loans
Credit quality information
Loans	0	0
Business Activities Loans | Non-accrual
Credit quality information
Loans	12,886	14,111
Business Activities Loans | Total classified
Credit quality information
Loans	24,685	21,921
Business Activities Loans | Total Criticized
Credit quality information
Loans	50,587	37,258
Acquired Loans
Credit quality information
Loans	792,991	859,330
Acquired Loans | Commercial real estate
Credit quality information
Loans	232,212	246,965
Acquired Loans | Commercial real estate | Construction and land development
Credit quality information
Loans	2,858	2,890
Acquired Loans | Commercial real estate | Commercial real estate other
Credit quality information
Loans	229,354	244,075
Acquired Loans | Commercial and industrial
Credit quality information
Loans	83,189	91,208
Acquired Loans | Commercial and industrial | Commercial
Credit quality information
Loans	45,867	52,470
Acquired Loans | Commercial and industrial | Agricultural
Credit quality information
Loans	0	0
Acquired Loans | Commercial and industrial | Tax exempt loans
Credit quality information
Loans	37,322	38,738
Acquired Loans | Residential mortgages
Credit quality information
Loans	436,316	474,509
Acquired Loans | Residential mortgages | Residential real estate
Credit quality information
Loans	436,316	474,509
Acquired Loans | Total residential real estate and consumer
Credit quality information
Total Performing and Nonperforming Loans	477,590	521,157
Acquired Loans | Total residential real estate and consumer | Residential real estate
Credit quality information
Total Performing and Nonperforming Loans	436,316	474,509
Acquired Loans | Total residential real estate and consumer | Home equity
Credit quality information
Total Performing and Nonperforming Loans	40,135	45,291
Acquired Loans | Total residential real estate and consumer | Other consumer
Credit quality information
Total Performing and Nonperforming Loans	1,139	1,357
Acquired Loans | Consumer
Credit quality information
Loans	41,274	46,648
Acquired Loans | Consumer | Home equity
Credit quality information
Loans	40,135	45,291
Acquired Loans | Consumer | Other consumer
Credit quality information
Loans	1,139	1,357
Acquired Loans | Performing | Total residential real estate and consumer
Credit quality information
Total Performing and Nonperforming Loans	474,324	516,943
Acquired Loans | Performing | Total residential real estate and consumer | Residential real estate
Credit quality information
Total Performing and Nonperforming Loans	433,244	470,497
Acquired Loans | Performing | Total residential real estate and consumer | Home equity
Credit quality information
Total Performing and Nonperforming Loans	39,941	45,090
Acquired Loans | Performing | Total residential real estate and consumer | Other consumer
Credit quality information
Total Performing and Nonperforming Loans	1,139	1,356
Acquired Loans | Nonperforming | Total residential real estate and consumer
Credit quality information
Total Performing and Nonperforming Loans	3,266	4,214
Acquired Loans | Nonperforming | Total residential real estate and consumer | Residential real estate
Credit quality information
Total Performing and Nonperforming Loans	3,072	4,012
Acquired Loans | Nonperforming | Total residential real estate and consumer | Home equity
Credit quality information
Total Performing and Nonperforming Loans	194	201
Acquired Loans | Nonperforming | Total residential real estate and consumer | Other consumer
Credit quality information
Total Performing and Nonperforming Loans	0	1
Acquired Loans | Pass | Commercial real estate
Credit quality information
Loans	223,538	239,019
Acquired Loans | Pass | Commercial real estate | Construction and land development
Credit quality information
Loans	2,579	2,626
Acquired Loans | Pass | Commercial real estate | Commercial real estate other
Credit quality information
Loans	220,959	236,393
Acquired Loans | Pass | Commercial and industrial
Credit quality information
Loans	75,876	84,858
Acquired Loans | Pass | Commercial and industrial | Commercial
Credit quality information
Loans	38,554	46,120
Acquired Loans | Pass | Commercial and industrial | Agricultural
Credit quality information
Loans	0	0
Acquired Loans | Pass | Commercial and industrial | Tax exempt loans
Credit quality information
Loans	37,322	38,738
Acquired Loans | Special mention
Credit quality information
Loans	7,783	6,399
Acquired Loans | Special mention | Commercial real estate
Credit quality information
Loans	1,964	1,574
Acquired Loans | Special mention | Commercial real estate | Construction and land development
Credit quality information
Loans	0	0
Acquired Loans | Special mention | Commercial real estate | Commercial real estate other
Credit quality information
Loans	1,964	1,574
Acquired Loans | Special mention | Commercial and industrial
Credit quality information
Loans	5,819	4,825
Acquired Loans | Special mention | Commercial and industrial | Commercial
Credit quality information
Loans	5,819	4,825
Acquired Loans | Special mention | Commercial and industrial | Agricultural
Credit quality information
Loans	0	0
Acquired Loans | Special mention | Commercial and industrial | Tax exempt loans
Credit quality information
Loans	0	0
Acquired Loans | Substandard
Credit quality information
Loans	8,401	7,987
Acquired Loans | Substandard | Commercial real estate
Credit quality information
Loans	6,542	6,273
Acquired Loans | Substandard | Commercial real estate | Construction and land development
Credit quality information
Loans	279	264
Acquired Loans | Substandard | Commercial real estate | Commercial real estate other
Credit quality information
Loans	6,263	6,009
Acquired Loans | Substandard | Commercial and industrial
Credit quality information
Loans	1,153	1,222
Acquired Loans | Substandard | Commercial and industrial | Commercial
Credit quality information
Loans	1,153	1,222
Acquired Loans | Substandard | Commercial and industrial | Agricultural
Credit quality information
Loans	0	0
Acquired Loans | Substandard | Commercial and industrial | Tax exempt loans
Credit quality information
Loans	0	0
Acquired Loans | Doubtful
Credit quality information
Loans	0	0
Acquired Loans | Doubtful | Commercial real estate
Credit quality information
Loans	168	99
Acquired Loans | Doubtful | Commercial real estate | Construction and land development
Credit quality information
Loans	0	0
Acquired Loans | Doubtful | Commercial real estate | Commercial real estate other
Credit quality information
Loans	168	99
Acquired Loans | Doubtful | Commercial and industrial
Credit quality information
Loans	341	303
Acquired Loans | Doubtful | Commercial and industrial | Commercial
Credit quality information
Loans	341	303
Acquired Loans | Doubtful | Commercial and industrial | Agricultural
Credit quality information
Loans	0	0
Acquired Loans | Doubtful | Commercial and industrial | Tax exempt loans
Credit quality information
Loans	0	0
Acquired Loans | Non-accrual
Credit quality information
Loans	3,069	4,124
Acquired Loans | Total classified
Credit quality information
Loans	11,470	12,111
Acquired Loans | Total Criticized
Credit quality information
Loans	$ 19,253	$ 18,510

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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.

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Amount, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement.

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