LOANS AND LEASES (Aging of Recorded Investment) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Nonaccrual Loans	$ 894	$ 2,323
Total Past Due and Nonaccrual	14,228	12,241
Loans and Leases Not Past Due	4,353,634	4,066,125
Total loans and leases, net of deferred costs	4,367,862	4,078,366
Commercial, Financial & Agricultural
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Nonaccrual Loans	0	0
Total Past Due and Nonaccrual	5,932	1,510
Loans and Leases Not Past Due	570,680	580,150
Total loans and leases, net of deferred costs	576,612	581,660
Leases
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Nonaccrual Loans	0	0
Total Past Due and Nonaccrual	0	0
Loans and Leases Not Past Due	31	124
Total loans and leases, net of deferred costs	31	124
Accruing Loans 30 - 59 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	9,139	8,087
Accruing Loans 30 - 59 Days Past Due \| Commercial, Financial & Agricultural
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	5,845	1,348
Accruing Loans 30 - 59 Days Past Due \| Leases
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Accruing Loans 60 - 89 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	3,960	1,295
Accruing Loans 60 - 89 Days Past Due \| Commercial, Financial & Agricultural
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	87	162
Accruing Loans 60 - 89 Days Past Due \| Leases
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Accruing Loans Greater Than 90 Days Past Due
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	235	536
Accruing Loans Greater Than 90 Days Past Due \| Commercial, Financial & Agricultural
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Accruing Loans Greater Than 90 Days Past Due \| Leases
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Residential Mortgage \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Nonaccrual Loans	799	2,048
Total Past Due and Nonaccrual	3,126	6,171
Loans and Leases Not Past Due	1,555,609	1,422,034
Total loans and leases, net of deferred costs	1,558,735	1,428,205
Residential Mortgage \| Accruing Loans 30 - 59 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	3,966
Residential Mortgage \| Accruing Loans 60 - 89 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	2,327	157
Residential Mortgage \| Accruing Loans Greater Than 90 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Construction \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Nonaccrual Loans	0	0
Total Past Due and Nonaccrual	0	0
Loans and Leases Not Past Due	96,661	66,927
Total loans and leases, net of deferred costs	96,661	66,927
Construction \| Accruing Loans 30 - 59 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Construction \| Accruing Loans 60 - 89 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Construction \| Accruing Loans Greater Than 90 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Home Equity \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Nonaccrual Loans	95	275
Total Past Due and Nonaccrual	665	1,110
Loans and Leases Not Past Due	474,900	467,856
Total loans and leases, net of deferred costs	475,565	468,966
Home Equity \| Accruing Loans 30 - 59 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	320	433
Home Equity \| Accruing Loans 60 - 89 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	250	104
Home Equity \| Accruing Loans Greater Than 90 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	298
Commercial Mortgage \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Nonaccrual Loans	0	0
Total Past Due and Nonaccrual	0	0
Loans and Leases Not Past Due	1,133,912	1,040,278
Total loans and leases, net of deferred costs	1,133,912	1,040,278
Commercial Mortgage \| Accruing Loans 30 - 59 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Commercial Mortgage \| Accruing Loans 60 - 89 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Commercial Mortgage \| Accruing Loans Greater Than 90 Days Past Due \| Real Estate
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	0	0
Consumer \| Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Nonaccrual Loans	0	0
Total Past Due and Nonaccrual	4,505	3,450
Loans and Leases Not Past Due	521,841	488,756
Total loans and leases, net of deferred costs	526,346	492,206
Consumer \| Accruing Loans 30 - 59 Days Past Due \| Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	2,974	2,340
Consumer \| Accruing Loans 60 - 89 Days Past Due \| Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	1,296	872
Consumer \| Accruing Loans Greater Than 90 Days Past Due \| Consumer
Aging Analysis of Accruing and Non-Accruing Loans and Leases
Past Due, Accuing Loans	$ 235	$ 238

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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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