Loans - Age Analysis of Recorded Investment in Loans (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Total Loans	$ 6,839,050	$ 6,934,769
30 to 59 Days Past Due
Total Loans	6,790	18,456
60 to 89 Days Past Due
Total Loans	5,407	1,803
Greater than 90 Days Past Due
Total Loans	15,432	22,425
Total Past Due
Total Loans	27,629	42,684
Current
Total Loans	6,811,421	6,892,085
Multi-family Residential Portfolio Segment [Member]
Total Loans	2,597,464	2,605,172
Multi-family Residential Portfolio Segment [Member] | 30 to 59 Days Past Due
Total Loans	2,504	1,475
Multi-family Residential Portfolio Segment [Member] | 60 to 89 Days Past Due
Total Loans	0	1,787
Multi-family Residential Portfolio Segment [Member] | Greater than 90 Days Past Due
Total Loans	3,600	3,547
Multi-family Residential Portfolio Segment [Member] | Total Past Due
Total Loans	6,104	6,809
Multi-family Residential Portfolio Segment [Member] | Current
Total Loans	2,591,360	2,598,363
Commercial Real Estate [Member]
Total Loans	1,916,994	1,914,898
Commercial Real Estate [Member] | 30 to 59 Days Past Due
Total Loans	0	2,561
Commercial Real Estate [Member] | 60 to 89 Days Past Due
Total Loans	0	0
Commercial Real Estate [Member] | Greater than 90 Days Past Due
Total Loans	0	254
Commercial Real Estate [Member] | Total Past Due
Total Loans	0	2,815
Commercial Real Estate [Member] | Current
Total Loans	1,916,994	1,912,083
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member]
Total Loans	545,222	557,295
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | 30 to 59 Days Past Due
Total Loans	773	3,721
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | 60 to 89 Days Past Due
Total Loans	0	0
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Greater than 90 Days Past Due
Total Loans	797	797
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Total Past Due
Total Loans	1,570	4,518
One-To-Four Family - Mixed-Use Property Portfolio Segment [Member] | Current
Total Loans	543,652	552,777
One-To-Four Family - Residential Portfolio Segment [Member]
Total Loans	231,215	242,480
One-To-Four Family - Residential Portfolio Segment [Member] | 30 to 59 Days Past Due
Total Loans	2,694	2,734
One-To-Four Family - Residential Portfolio Segment [Member] | 60 to 89 Days Past Due
Total Loans	173	0
One-To-Four Family - Residential Portfolio Segment [Member] | Greater than 90 Days Past Due
Total Loans	4,632	3,953
One-To-Four Family - Residential Portfolio Segment [Member] | Total Past Due
Total Loans	7,499	6,687
One-To-Four Family - Residential Portfolio Segment [Member] | Current
Total Loans	223,716	235,793
Construction Portfolio Segment
Total Loans	57,205	70,824
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	2,600
Construction Portfolio Segment | Total Past Due
Total Loans	0	2,600
Construction Portfolio Segment | Current
Total Loans	57,205	68,224
Small Business Administration Portfolio Segment [Member]
Total Loans	22,313	23,193
Small Business Administration Portfolio Segment [Member] | 30 to 59 Days Past Due
Total Loans	325	329
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	1,124	950
Small Business Administration Portfolio Segment [Member] | Total Past Due
Total Loans	1,449	1,279
Small Business Administration Portfolio Segment [Member] | Current
Total Loans	20,864	21,914
Commercial Business and Other Portfolio Segment [Member]
Total Loans	1,468,637	1,520,907
Commercial Business and Other Portfolio Segment [Member] | 30 to 59 Days Past Due
Total Loans	494	7,636
Commercial Business and Other Portfolio Segment [Member] | 60 to 89 Days Past Due
Total Loans	5,234	16
Commercial Business and Other Portfolio Segment [Member] | Greater than 90 Days Past Due
Total Loans	5,279	10,324
Commercial Business and Other Portfolio Segment [Member] | Total Past Due
Total Loans	11,007	17,976
Commercial Business and Other Portfolio Segment [Member] | Current
Total Loans	$ 1,457,630	$ 1,502,931