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LOANS (Schedule of Activity in the Allowance for Loan Losses by Segment) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				$ 26,272,000				$ 18,942,000	$ 26,272,000	$ 18,942,000
Provision for loan and lease losses	$ 1,795,000	$ 1,137,000	$ 1,766,000	4,790,000	$ 2,300,000	$ 2,004,000	$ 1,950,000	(2,031,000)	9,488,000	4,223,000
Loans charged-off									(505,000)	(1,187,000)
Recoveries									152,000	4,294,000
Total ending allowance balance	35,407,000				26,272,000				35,407,000	26,272,000
Net charge-offs (recoveries)									353,000	3,100,000
Recovered charged-off in taxi medallion loans										4,300,000
Real estate | Commercial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				15,317,000				9,037,000	15,317,000	9,037,000
Provision for loan and lease losses									1,926,000	6,280,000
Total ending allowance balance	17,243,000				15,317,000				17,243,000	15,317,000
Real estate | Construction
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				411,000				625,000	411,000	625,000
Provision for loan and lease losses									1,182,000	(214,000)
Total ending allowance balance	1,593,000				411,000				1,593,000	411,000
Real estate | Multi-family
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				2,453,000				2,047,000	2,453,000	2,047,000
Provision for loan and lease losses									208,000	406,000
Total ending allowance balance	2,661,000				2,453,000				2,661,000	2,453,000
Real estate | One to four family
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				267,000				228,000	267,000	228,000
Provision for loan and lease losses									(61,000)	39,000
Total ending allowance balance	206,000				267,000				206,000	267,000
Commercial and industrial
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				7,070,000				6,257,000	7,070,000	6,257,000
Provision for loan and lease losses									5,165,000	(2,678,000)
Loans charged-off									(254,000)	(798,000)
Recoveries									142,000	4,289,000
Total ending allowance balance	12,123,000				7,070,000				12,123,000	7,070,000
Consumer
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance				$ 754,000				$ 748,000	754,000	748,000
Provision for loan and lease losses									1,068,000	390,000
Loans charged-off									(251,000)	(389,000)
Recoveries									10,000	5,000
Total ending allowance balance	$ 1,581,000				$ 754,000				$ 1,581,000	$ 754,000

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Amount of recovery charge-off in taxi medallion loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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