LOANS AND CREDIT QUALITY (Class and Credit Indicator) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Recorded investment in the loans and leases, by class and credit indicator
2021	$ 1,143,794	$ 1,353,673
2020	886,215	690,783
2019	568,082	504,631
2018	387,358	438,649
2017	340,963	364,528
Prior	997,823	940,544
Amortized Cost of Revolving Loans	721,562	671,305
Total	5,045,797	4,964,113
Loans and leases, gross	5,053,574	4,972,004
Net deferred fees	(7,777)	(7,891)
Total loans, net of allowance for credit losses	5,045,797	4,964,113
Pass
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	4,961,932	4,779,727
Special Mention
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	45,180	142,499
Substandard
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	46,408	49,730
Loss
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	54	48
Small Business Administration Paycheck Protection Program \| Commercial Financial And Agricultural
Recorded investment in the loans and leases, by class and credit indicator
2021	182,415	416,375
2020	36,256	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Amortized Cost of Revolving Loans	0	0
Total	218,671	416,375
Loans and leases, gross	226,596	425,993
Net deferred fees	(7,925)	(9,618)
Total loans, net of allowance for credit losses	218,671	416,375
Small Business Administration Paycheck Protection Program \| Pass \| Commercial Financial And Agricultural
Recorded investment in the loans and leases, by class and credit indicator
2021	182,415	416,375
2020	36,256	0
2019	0	0
2018	0	0
2017	0	0
Prior	0	0
Amortized Cost of Revolving Loans	0	0
Total	218,671	416,375
Loans and leases, gross	226,596	425,993
Small Business Administration Paycheck Protection Program \| Special Mention \| Commercial Financial And Agricultural
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	0	0
Small Business Administration Paycheck Protection Program \| Substandard \| Commercial Financial And Agricultural
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	0	0
Small Business Administration Paycheck Protection Program \| Loss \| Commercial Financial And Agricultural
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	0	0
Other \| Commercial Financial And Agricultural
Recorded investment in the loans and leases, by class and credit indicator
2021	86,791	96,346
2020	64,843	72,619
2019	67,775	68,650
2018	63,365	74,826
2017	49,770	43,463
Prior	113,299	106,302
Amortized Cost of Revolving Loans	73,030	82,885
Total	518,873	545,091
Loans and leases, gross	519,227	545,136
Net deferred fees	(354)	(45)
Total loans, net of allowance for credit losses	518,873	545,091
Other \| Pass \| Commercial Financial And Agricultural
Recorded investment in the loans and leases, by class and credit indicator
2021	85,710	86,456
2020	59,807	55,660
2019	59,784	61,314
2018	61,017	47,672
2017	33,634	39,337
Prior	110,579	98,136
Amortized Cost of Revolving Loans	73,030	82,465
Total	483,561	471,040
Loans and leases, gross	483,915	471,085
Other \| Special Mention \| Commercial Financial And Agricultural
Recorded investment in the loans and leases, by class and credit indicator
2021	914	9,690
2020	5,036	16,120
2019	7,350	6,293
2018	387	26,109
2017	9,206	1,556
Prior	424	6,989
Amortized Cost of Revolving Loans	0	420
Total	23,317	67,177
Loans and leases, gross	23,317	67,177
Other \| Substandard \| Commercial Financial And Agricultural
Recorded investment in the loans and leases, by class and credit indicator
2021	167	200
2020	0	839
2019	641	1,043
2018	1,961	1,045
2017	6,930	2,570
Prior	2,296	1,177
Amortized Cost of Revolving Loans	0	0
Total	11,995	6,874
Loans and leases, gross	11,995	6,874
Other \| Loss \| Commercial Financial And Agricultural
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	0	0
Construction \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	17,819	22,491
2020	22,932	29,518
2019	32,830	39,633
2018	30,137	9,365
2017	291	2,163
Prior	20,571	19,138
Amortized Cost of Revolving Loans	4,328	3,099
Total	128,908	125,407
Loans and leases, gross	129,207	125,625
Net deferred fees	(299)	(218)
Total loans, net of allowance for credit losses	128,908	125,407
Construction \| Pass \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	17,819	22,491
2020	22,932	29,518
2019	32,830	36,790
2018	29,217	9,365
2017	291	2,163
Prior	20,571	19,138
Amortized Cost of Revolving Loans	4,328	3,099
Total	127,988	122,564
Loans and leases, gross	128,287	122,782
Construction \| Special Mention \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021		0
2020		0
2019		2,843
2018		0
2017		0
Prior		0
Amortized Cost of Revolving Loans		0
Total		2,843
Loans and leases, gross	0	2,843
Construction \| Substandard \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2018	920
Total	920
Loans and leases, gross	920	0
Construction \| Loss \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	0	0
Residential Mortgage \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	442,001	557,476
2020	500,121	276,645
2019	196,854	128,027
2018	90,309	137,689
2017	103,151	182,305
Prior	416,293	408,070
Amortized Cost of Revolving Loans	0	0
Total	1,748,729	1,690,212
Loans and leases, gross	1,747,183	1,687,251
Net deferred fees	1,546	2,961
Total loans, net of allowance for credit losses	1,748,729	1,690,212
Residential Mortgage \| Pass \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	442,001	556,479
2020	499,142	276,645
2019	196,854	127,490
2018	89,217	136,307
2017	102,258	180,782
Prior	412,485	406,020
Amortized Cost of Revolving Loans	0	0
Total	1,741,957	1,683,723
Loans and leases, gross	1,740,411	1,680,762
Residential Mortgage \| Special Mention \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	0	997
2020	979	0
2019	0	0
2018	0	597
2017	0	142
Prior	0	0
Amortized Cost of Revolving Loans	0	0
Total	979	1,736
Loans and leases, gross	979	1,736
Residential Mortgage \| Substandard \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	0	0
2020	0	0
2019	0	537
2018	1,092	785
2017	893	1,381
Prior	3,808	2,050
Amortized Cost of Revolving Loans	0	0
Total	5,793	4,753
Loans and leases, gross	5,793	4,753
Residential Mortgage \| Loss \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	0	0
Home Equity \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	17,687	17,582
2020	14,500	15,851
2019	11,407	15,567
2018	11,644	679
2017	729	1,223
Prior	8,539	4,916
Amortized Cost of Revolving Loans	554,445	495,448
Total	618,951	551,266
Loans and leases, gross	617,545	550,216
Net deferred fees	1,406	1,050
Total loans, net of allowance for credit losses	618,951	551,266
Home Equity \| Pass \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	17,687	17,582
2020	14,145	15,851
2019	11,407	15,567
2018	11,564	679
2017	729	1,023
Prior	8,094	4,592
Amortized Cost of Revolving Loans	554,445	494,741
Total	618,071	550,035
Loans and leases, gross	616,665	548,985
Home Equity \| Special Mention \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021		0
2020		0
2019		0
2018		0
2017		0
Prior		0
Amortized Cost of Revolving Loans		707
Total		707
Loans and leases, gross	0	707
Home Equity \| Substandard \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	0	0
2020	355	0
2019	0	0
2018	80	0
2017	0	200
Prior	445	324
Amortized Cost of Revolving Loans	0	0
Total	880	524
Loans and leases, gross	880	524
Home Equity \| Loss \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	0	0
Commercial Mortgage \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	176,873	130,448
2020	138,875	148,056
2019	153,532	174,166
2018	141,740	171,471
2017	161,324	117,927
Prior	426,355	398,060
Amortized Cost of Revolving Loans	9,718	16,200
Total	1,208,417	1,156,328
Loans and leases, gross	1,210,460	1,158,203
Net deferred fees	(2,043)	(1,875)
Total loans, net of allowance for credit losses	1,208,417	1,156,328
Commercial Mortgage \| Pass \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	176,873	130,448
2020	138,875	144,244
2019	144,713	123,519
2018	127,048	166,618
2017	159,234	104,381
Prior	404,683	363,837
Amortized Cost of Revolving Loans	9,718	16,200
Total	1,161,144	1,049,247
Loans and leases, gross	1,163,187	1,051,122
Commercial Mortgage \| Special Mention \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	0	0
2020	0	2,021
2019	7,059	31,647
2018	6,642	2,919
2017	290	13,546
Prior	6,893	19,653
Amortized Cost of Revolving Loans	0	0
Total	20,884	69,786
Loans and leases, gross	20,884	69,786
Commercial Mortgage \| Substandard \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
2021	0	0
2020	0	1,791
2019	1,760	19,000
2018	8,050	1,934
2017	1,800	0
Prior	14,779	14,570
Amortized Cost of Revolving Loans	0	0
Total	26,389	37,295
Loans and leases, gross	26,389	37,295
Commercial Mortgage \| Loss \| Real Estate
Recorded investment in the loans and leases, by class and credit indicator
Loans and leases, gross	0	0
Consumer \| Consumer
Recorded investment in the loans and leases, by class and credit indicator
2021	220,208	112,955
2020	108,688	148,094
2019	105,684	78,588
2018	50,163	44,619
2017	25,698	17,447
Prior	12,766	4,058
Amortized Cost of Revolving Loans	80,041	73,673
Total	603,248	479,434
Loans and leases, gross	603,356	479,580
Net deferred fees	(108)	(146)
Total loans, net of allowance for credit losses	603,248	479,434
Consumer \| Pass \| Consumer
Recorded investment in the loans and leases, by class and credit indicator
2021	220,208	112,955
2020	108,571	147,940
2019	105,581	78,486
2018	50,109	44,571
2017	25,670	17,445
Prior	12,583	4,032
Amortized Cost of Revolving Loans	80,041	73,423
Total	602,763	478,852
Loans and leases, gross	602,871	478,998
Consumer \| Special Mention \| Consumer
Recorded investment in the loans and leases, by class and credit indicator
2021		0
2020		0
2019		0
2018		0
2017		0
Prior		0
Amortized Cost of Revolving Loans		250
Total		250
Loans and leases, gross	0	250
Consumer \| Substandard \| Consumer
Recorded investment in the loans and leases, by class and credit indicator
2021	0	0
2020	117	138
2019	103	102
2018	54	22
2017	28	0
Prior	129	22
Amortized Cost of Revolving Loans	0	0
Total	431	284
Loans and leases, gross	431	284
Consumer \| Loss \| Consumer
Recorded investment in the loans and leases, by class and credit indicator
2021	0	0
2020	0	16
2019	0	0
2018	0	26
2017	0	2
Prior	54	4
Amortized Cost of Revolving Loans	0	0
Total	54	48
Loans and leases, gross	$ 54	$ 48

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Amount of deferred interest and fee income, unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of acquired loans. Excludes amounts for loans and leases covered under loss sharing agreements.

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