LOANS AND LEASES (Schedule of Balances by Portfolio Class, Based on Impairment Method) (Details) - USD ($) $ in Thousands		Sep. 30, 2021		Jun. 30, 2021	Dec. 31, 2020		Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019
Total Loans Individually Evaluated for Impairment		$ 26,341			$ 16,204
Ending ALLL Attributable to Loans Individually Evaluated for Impairment		7,217			2,703
Total Loans Collectively Evaluated for Impairment		4,545,405			4,353,369
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		57,916			64,606
Total Loans		4,571,746			4,369,573
Total Ending ALLL		65,133		$ 63,505	67,309		$ 66,145	$ 66,065	$ 43,676
Residential Portfolio Segment [Member] | Primary Residential Mortgages [Member]
Total Loans Individually Evaluated for Impairment		2,886			1,490
Ending ALLL Attributable to Loans Individually Evaluated for Impairment		80			3
Total Loans Collectively Evaluated for Impairment		511,385			511,351
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		1,995			2,902
Total Loans		514,271			512,841
Total Ending ALLL		2,075		2,167	2,905		2,967	3,074	2,090
Residential Portfolio Segment [Member] | Home Equity Lines of Credit [Member]
Total Loans Collectively Evaluated for Impairment		42,512			50,545
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		119			218
Total Loans		42,512			50,545
Total Ending ALLL		119		123	218		220	244	128
Residential Portfolio Segment [Member] | Multifamily Property [Member]
Total Loans Collectively Evaluated for Impairment		1,497,683			1,126,946
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		10,568			9,945
Total Loans		1,497,683			1,126,946
Total Ending ALLL		10,568		10,615	9,945		10,664	9,662	6,037
Residential Portfolio Segment [Member] | Junior Lien [Member]
Total Loans Collectively Evaluated for Impairment		3,218			4,527
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		7			15
Total Loans		3,218			4,527
Total Ending ALLL		7		8	15		18	20	13
Commercial Real Estate Portfolio Segment [Member] | Owner Occupied Property [Member]
Total Loans Individually Evaluated for Impairment		494			807
Total Loans Collectively Evaluated for Impairment		239,180			252,640
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		2,293			3,050
Total Loans		239,674			253,447
Total Ending ALLL		2,293		2,447	3,050		3,011	3,177	2,064
Commercial Real Estate Portfolio Segment [Member] | Investment Property [Member]
Total Loans Individually Evaluated for Impairment		19,887			4,593
Ending ALLL Attributable to Loans Individually Evaluated for Impairment		7,137
Total Loans Collectively Evaluated for Impairment		961,603			991,020
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		22,847			27,713
Total Loans		981,490			995,613
Total Ending ALLL		29,984		27,886	27,713		29,166	29,866	15,988
Commercial Portfolio Segment [Member] | Construction [Member]
Total Loans Collectively Evaluated for Impairment		25,862			12,773
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		165			158
Total Loans		25,862			12,773
Total Ending ALLL		165		159	158		77	49	27
Consumer and Other Loans [Member]
Total Loans Collectively Evaluated for Impairment		38,032			44,483
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		229			279
Total Loans		38,032			44,483
Total Ending ALLL		229		217	279		362	368	296
Commercial and Industrial Sector [Member] | Commercial Portfolio Segment [Member]
Total Loans Individually Evaluated for Impairment		3,074	[1]		9,314	[2]
Ending ALLL Attributable to Loans Individually Evaluated for Impairment	[2]				2,700
Total Loans Collectively Evaluated for Impairment		913,118	[1]		1,050,085	[2]
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		16,266	[1]		16,347	[2]
Total Loans	[3]	916,192	[1]		1,059,399	[2]
Total Ending ALLL		16,266	[1]	16,565	19,047	[2]	16,172	16,218	14,353
Lease Financing [Member]
Total Loans Collectively Evaluated for Impairment		308,351			305,931
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		3,369			3,936
Total Loans		308,351			305,931
Total Ending ALLL		3,369			3,936
Agricultural Sector [Member]
Total Loans Collectively Evaluated for Impairment		4,461			3,068
Ending ALLL Attributable to Loans Collectively Evaluated for Impairment		58			43
Total Loans		4,461			3,068
Total Ending ALLL		$ 58		$ 43	$ 43		$ 15	$ 38	$ 38

[1] The balance includes PPP loans of $49 million, which had no related reserve as these loans are guaranteed by the SBA.

[2] The balance includes PPP loans of $196 million, which had no related reserve as these loans are guaranteed by the SBA.

[3] Includes PPP loans of $49 million at September 30, 2021 and $196 million at December 31, 2020.