LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS (Activity in Allowance for Loan Losses by Portfolio Segment) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Activity in ALL:
Beginning balance	$ 35,775	$ 26,521	$ 37,865	$ 25,171	$ 25,171
Loans charged off	(420)	(484)	(707)	(974)	(1,838)
Recoveries	157	102	208	170	1,084
Provision	(3,452)	9,400	(5,306)	11,172	13,215
Ending balance	32,060	35,539	32,060	35,539	37,865
Ending Balance: Individually evaluated for impairment		462		462
Ending Balance: Collectively evaluated for impairment		35,077		35,077
Ending Balance: Individually evaluated for impairment		4,163		4,163
Ending Balance: Collectively evaluated for impairment		3,321,878		3,321,878
Total Loans Outstanding	3,285,916	3,326,041	3,285,916	3,326,041	3,219,822
Commercial Real Estate(1)
Activity in ALL:
Beginning balance		13,374		12,414	12,414
Loans charged off		(21)		(71)
Recoveries		3		7
Provision		5,030		6,036
Ending balance		18,386		18,386
Ending Balance: Individually evaluated for impairment		35		35
Ending Balance: Collectively evaluated for impairment		18,351		18,351
Ending Balance: Individually evaluated for impairment		461		461
Ending Balance: Collectively evaluated for impairment		1,310,524		1,310,524
Total Loans Outstanding		1,310,985		1,310,985
Commercial
Activity in ALL:
Beginning balance	5,170	4,297	6,703	3,985	3,985
Loans charged off	(259)	(420)	(406)	(673)	(1,130)
Recoveries	67	63	110	116	572
Provision	(636)	909	(2,065)	1,421	1,728
Ending balance	4,342	4,849	4,342	4,849	6,703
Ending Balance: Individually evaluated for impairment		0		0
Ending Balance: Collectively evaluated for impairment		4,849		4,849
Ending Balance: Individually evaluated for impairment		179		179
Ending Balance: Collectively evaluated for impairment		428,007		428,007
Total Loans Outstanding		428,186		428,186
SBA PPP Portfolio Segment
Activity in ALL:
Beginning balance	87	0	69	0	0
Loans charged off	0	0	0	0	0
Recoveries	0	0	0	0	0
Provision	(21)	113	(3)	113	69
Ending balance	66	113	66	113	69
Ending Balance: Individually evaluated for impairment		0		0
Ending Balance: Collectively evaluated for impairment		113		113
Ending Balance: Individually evaluated for impairment		0		0
Ending Balance: Collectively evaluated for impairment		218,803		218,803
Total Loans Outstanding		218,803		218,803
Residential Real Estate
Activity in ALL:
Beginning balance	3,093	5,897	3,474	5,842	5,842
Loans charged off	(35)	0	(88)	(96)	(121)
Recoveries	70	21	70	23	292
Provision	77	2,685	(251)	2,834	(1,410)
Ending balance	3,205	8,603	3,205	8,603	3,474
Ending Balance: Individually evaluated for impairment		338		338
Ending Balance: Collectively evaluated for impairment		8,265		8,265
Ending Balance: Individually evaluated for impairment		3,153		3,153
Ending Balance: Collectively evaluated for impairment		1,051,180		1,051,180
Total Loans Outstanding		1,054,333		1,054,333
Home Equity
Activity in ALL:
Beginning balance	2,176	2,480	2,616	2,423	2,423
Loans charged off	(107)	(17)	(145)	(51)	(317)
Recoveries	0	0	0	4	33
Provision	(4)	621	(406)	708	(315)
Ending balance	2,065	3,084	2,065	3,084	2,616
Ending Balance: Individually evaluated for impairment		89		89
Ending Balance: Collectively evaluated for impairment		2,995		2,995
Ending Balance: Individually evaluated for impairment		370		370
Ending Balance: Collectively evaluated for impairment		290,445		290,445
Total Loans Outstanding		290,815		290,815
Consumer
Activity in ALL:
Beginning balance	228	473	393	507	507
Loans charged off	(19)	(26)	(68)	(83)	(167)
Recoveries	17	15	23	20	67
Provision	63	42	(59)	60	206
Ending balance	$ 289	504	$ 289	504	$ 393
Ending Balance: Individually evaluated for impairment		0		0
Ending Balance: Collectively evaluated for impairment		504		504
Ending Balance: Individually evaluated for impairment		0		0
Ending Balance: Collectively evaluated for impairment		22,919		22,919
Total Loans Outstanding		$ 22,919		$ 22,919

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

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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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