Loans - Age Analysis of Recorded Investment in Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Total Loans	$ 6,828,277	$ 6,907,899
30 to 59 Days Past Due
Total Loans	10,351	14,655
60 to 89 Days Past Due
Total Loans	6,398	2,823
Greater than 90 Days Past Due
Total Loans	20,635	20,939
Total Past Due
Total Loans	37,384	38,417
Current
Total Loans	6,790,893	6,869,482
Multi-family Residential Portfolio Segment [Member]
Total Loans	2,626,267	2,662,226
Multi-family Residential Portfolio Segment [Member] | 30 to 59 Days Past Due
Total Loans	5,796	2,722
Multi-family Residential Portfolio Segment [Member] | 60 to 89 Days Past Due
Total Loans	5,037	539
Multi-family Residential Portfolio Segment [Member] | Greater than 90 Days Past Due
Total Loans	5,103	5,103
Multi-family Residential Portfolio Segment [Member] | Total Past Due
Total Loans	15,936	8,364
Multi-family Residential Portfolio Segment [Member] | Current
Total Loans	2,610,331	2,653,862
Commercial Real Estate [Member]
Total Loans	1,926,549	1,959,624
Commercial Real Estate [Member] | 30 to 59 Days Past Due
Total Loans	0	8,090
Commercial Real Estate [Member] | 60 to 89 Days Past Due
Total Loans	0	1,099
Commercial Real Estate [Member] | Greater than 90 Days Past Due
Total Loans	0	0
Commercial Real Estate [Member] | Total Past Due
Total Loans	0	9,189
Commercial Real Estate [Member] | Current
Total Loans	1,926,549	1,950,435
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Total Loans	518,855	533,084
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | 30 to 59 Days Past Due
Total Loans	2,870	1,708
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | 60 to 89 Days Past Due
Total Loans	234	124
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Greater than 90 Days Past Due
Total Loans	933	1,005
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Total Past Due
Total Loans	4,037	2,837
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Current
Total Loans	514,818	530,247
One-To-Four Family - Residential Portfolio Segment [Member]
Total Loans	267,075	221,519
One-To-Four Family - Residential Portfolio Segment [Member] | 30 to 59 Days Past Due
Total Loans	1,521	1,715
One-To-Four Family - Residential Portfolio Segment [Member] | 60 to 89 Days Past Due
Total Loans	631	0
One-To-Four Family - Residential Portfolio Segment [Member] | Greater than 90 Days Past Due
Total Loans	3,341	4,670
One-To-Four Family - Residential Portfolio Segment [Member] | Total Past Due
Total Loans	5,493	6,385
One-To-Four Family - Residential Portfolio Segment [Member] | Current
Total Loans	261,582	215,134
Construction Portfolio Segment
Total Loans	60,141	58,261
Construction Portfolio Segment | 30 to 59 Days Past Due
Total Loans	0	0
Construction Portfolio Segment | 60 to 89 Days Past Due
Total Loans	0	0
Construction Portfolio Segment | Greater than 90 Days Past Due
Total Loans	0	0
Construction Portfolio Segment | Total Past Due
Total Loans	0	0
Construction Portfolio Segment | Current
Total Loans	60,141	58,261
Small Business Administration Portfolio Segment [Member]
Total Loans	16,442	20,345
Small Business Administration Portfolio Segment [Member] | 30 to 59 Days Past Due
Total Loans	0	0
Small Business Administration Portfolio Segment [Member] | 60 to 89 Days Past Due
Total Loans	0	0
Small Business Administration Portfolio Segment [Member] | Greater than 90 Days Past Due
Total Loans	2,641	2,576
Small Business Administration Portfolio Segment [Member] | Total Past Due
Total Loans	2,641	2,576
Small Business Administration Portfolio Segment [Member] | Current
Total Loans	13,801	17,769
Commercial Business and Other Portfolio Segment [Member]
Total Loans	1,412,948	1,452,840
Commercial Business and Other Portfolio Segment [Member] | 30 to 59 Days Past Due
Total Loans	164	420
Commercial Business and Other Portfolio Segment [Member] | 60 to 89 Days Past Due
Total Loans	496	1,061
Commercial Business and Other Portfolio Segment [Member] | Greater than 90 Days Past Due
Total Loans	8,617	7,585
Commercial Business and Other Portfolio Segment [Member] | Total Past Due
Total Loans	9,277	9,066
Commercial Business and Other Portfolio Segment [Member] | Current
Total Loans	$ 1,403,671	$ 1,443,774