LOANS (Schedule of Balances by Portfolio Class, Based on Impairment Method) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Total Loans Individually Evaluated for Impairment	$ 35,924	$ 31,300
Ending ALLL Attributable to Loans Individually Evaluated for Impairment	2,800	262
Total Loans Collectively Evaluated for Impairment	4,353,717	3,893,012
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	40,876	38,242
Total Loans	4,389,641	3,924,312
Total Ending ALLL	43,676	38,504	$ 36,440	$ 32,208
Residential Portfolio Segment [Member] | Primary Residential Mortgages [Member]
Total Loans Individually Evaluated for Impairment	6,890	9,518
Ending ALLL Attributable to Loans Individually Evaluated for Impairment	215	262
Total Loans Collectively Evaluated for Impairment	571,416	591,373
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	1,875	3,244
Total Loans	578,306	600,891
Total Ending ALLL	2,090	3,506	4,085	3,666
Residential Portfolio Segment [Member] | Home Equity Lines of Credit [Member]
Total Loans Individually Evaluated for Impairment	3	255
Total Loans Collectively Evaluated for Impairment	57,245	61,936
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	128	164
Total Loans	57,248	62,191
Total Ending ALLL	128	164	221	233
Residential Portfolio Segment [Member] | Multifamily Property [Member]
Total Loans Individually Evaluated for Impairment		1,262
Total Loans Collectively Evaluated for Impairment	1,210,003	1,134,543
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	6,037	5,959
Total Loans	1,210,003	1,135,805
Total Ending ALLL	6,037	5,959	10,007	11,192
Residential Portfolio Segment [Member] | Junior Lien [Member]
Total Loans Individually Evaluated for Impairment	19	36
Total Loans Collectively Evaluated for Impairment	6,992	7,382
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	13	15
Total Loans	7,011	7,418
Total Ending ALLL	13	15	12	16
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Property [Member]
Total Loans Individually Evaluated for Impairment	379	1,574
Total Loans Collectively Evaluated for Impairment	249,040	259,619
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	2,064	2,614
Total Loans	249,419	261,193
Total Ending ALLL	2,064	2,614	2,385	1,774
Commercial Real Estate Portfolio Segment [Member] | Investment Property [Member]
Total Loans Individually Evaluated for Impairment	22,605	18,655
Ending ALLL Attributable to Loans Individually Evaluated for Impairment	1,000
Total Loans Collectively Evaluated for Impairment	1,072,577	983,263
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	14,988	14,248
Total Loans	1,095,182	1,001,918
Total Ending ALLL	15,988	14,248	11,933	10,909
Commercial Portfolio Segment [Member] | Construction [Member]
Total Loans Collectively Evaluated for Impairment	5,520	86
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	27	1
Total Loans	5,520	86
Total Ending ALLL	27	1	1	9
Consumer and Other [Member]
Total Loans Collectively Evaluated for Impairment	58,213	65,180
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	296	384
Total Loans	58,213	65,180
Total Ending ALLL	296	384	349	243
Commercial and Industrial Sector [Member] | Commercial Portfolio Segment [Member]
Total Loans Individually Evaluated for Impairment	6,028
Ending ALLL Attributable to Loans Individually Evaluated for Impairment	1,585
Total Loans Collectively Evaluated for Impairment	861,267	616,838
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	12,768	9,839
Total Loans	867,295	616,838
Total Ending ALLL	14,353	9,839	$ 6,563	4,164
Lease Financing [Member]
Total Loans Collectively Evaluated for Impairment	258,401	172,643
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	2,642	1,772
Total Loans	258,401	172,643
Total Ending ALLL	2,642	1,772
Agricultural Sector [Member]
Total Loans Collectively Evaluated for Impairment	3,043	149
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment	38	2
Total Loans	3,043	149
Total Ending ALLL	$ 38	$ 2		$ 2