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Loans - Non-Accrual at Amortized Cost (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Total Non-accrual amortized cost	$ 17,070	$ 15,253	$ 20,947
Non-Accrual with no related Allowance	13,068	13,613
Interest income recognized	4	104
Multi-family Residential Portfolio Segment [Member]
Total Non-accrual amortized cost	3,654	2,652	2,576
Non-Accrual with no related Allowance	3,654	2,652
Interest income recognized		19
Commercial Real Estate
Total Non-accrual amortized cost	32	640	1,766
Non-Accrual with no related Allowance	32	640
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Total Non-accrual amortized cost	1,052	1,582	1,706
Non-Accrual with no related Allowance	1,052	1,582
Interest income recognized		6
One-To-Four Family - Residential Portfolio Segment [Member]
Total Non-accrual amortized cost	7,052	7,482	5,313
Non-Accrual with no related Allowance	7,052	7,482
Interest income recognized		1
Small Business Administration Portfolio Segment [Member]
Total Non-accrual amortized cost	952	952	1,168
Non-Accrual with no related Allowance	952	952
Taxi Medallion Portfolio Segment [Member]
Total Non-accrual amortized cost			2,758
Commercial Business and Other Portfolio Segment [Member]
Total Non-accrual amortized cost	4,328	1,945	$ 5,660
Non-Accrual with no related Allowance	326	305
Interest income recognized	$ 4	$ 78

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Amount of financing receivable on nonaccrual status at amortized cost.

+ References

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Amount of interest income on financing receivable on nonaccrual status.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
-Subparagraph (b)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 16
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