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Loans - Age Analysis of Recorded Investment in Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Total	$ 6,956,674
Total loans	6,956,674	$ 6,638,105
Financing Receivables, 30 to 59 Days Past Due [Member]
Total	7,655	11,978
Financing Receivables, 60 to 89 Days Past Due [Member]
Total	15,287	4,457
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total	15,903	14,434
Total Past Due [Member]
Total	38,845	30,869
Current [Member]
Total	6,917,829	6,607,236
Multi-family Residential Portfolio Segment [Member]
Total	2,611,342
Total loans	2,611,342	2,519,227
Multi-family Residential Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total	4,920	3,652
Multi-family Residential Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total	1,077	4,193
Multi-family Residential Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total	3,715	2,652
Multi-family Residential Portfolio Segment [Member] | Total Past Due [Member]
Total	9,712	10,497
Multi-family Residential Portfolio Segment [Member] | Current [Member]
Total	2,601,630	2,508,730
Commercial Real Estate
Total	1,916,012
Total loans	1,916,012	1,777,375
Commercial Real Estate | Financing Receivables, 30 to 59 Days Past Due [Member]
Total	0	5,743
Commercial Real Estate | Financing Receivables, 60 to 89 Days Past Due [Member]
Total	4,066	0
Commercial Real Estate | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total	3,908	640
Commercial Real Estate | Total Past Due [Member]
Total	7,974	6,383
Commercial Real Estate | Current [Member]
Total	1,908,038	1,770,992
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Total	563,784
Total loans	563,784	574,936
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total	2,311	2,319
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total	318	0
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total	796	1,321
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Total Past Due [Member]
Total	3,425	3,640
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Current [Member]
Total	560,359	571,296
One-To-Four Family - Residential Portfolio Segment [Member]
Total	241,640
Total loans	241,640	277,812
One-To-Four Family - Residential Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total	99	163
One-To-Four Family - Residential Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total	229	224
One-To-Four Family - Residential Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total	4,191	7,483
One-To-Four Family - Residential Portfolio Segment [Member] | Total Past Due [Member]
Total	4,519	7,870
One-To-Four Family - Residential Portfolio Segment [Member] | Current [Member]
Total	237,121	269,942
Construction Portfolio Segment [Member]
Total	63,487
Total loans	63,487	59,473
Construction Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total	0	0
Construction Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total	0	0
Construction Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total	0	0
Construction Portfolio Segment [Member] | Total Past Due [Member]
Total	0	0
Construction Portfolio Segment [Member] | Current [Member]
Total	63,487	59,473
Small Business Administration Portfolio Segment [Member]
Total	27,557
Total loans	27,557	91,836
Small Business Administration Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total	0	0
Small Business Administration Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total	0	0
Small Business Administration Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total	950	952
Small Business Administration Portfolio Segment [Member] | Total Past Due [Member]
Total	950	952
Small Business Administration Portfolio Segment [Member] | Current [Member]
Total	26,607	90,884
Commercial Business and Other Portfolio Segment [Member]
Total loans	1,532,852	1,337,446
Commercial Business and Other Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Total	325	101
Commercial Business and Other Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Total	9,597	40
Commercial Business and Other Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Total	2,343	1,386
Commercial Business and Other Portfolio Segment [Member] | Total Past Due [Member]
Total	12,265	1,527
Commercial Business and Other Portfolio Segment [Member] | Current [Member]
Total	$ 1,520,587	$ 1,335,919

X

- Definition

Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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