CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
ASSETS
Debt Securities, Available-for-sale, Allowance for Credit Loss	$ (750)	$ 0
Debt Securities, Available-for-sale, Amortized Cost	2,774,972	3,218,777
Securities—held-to-maturity, net of allowance for credit losses of $349 and $379, respectively	1,082,156	1,117,588
Allowance for Credit Losses	$ (349)	$ (379)
SHAREHOLDERS’ EQUITY
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	500,000	500,000
Preferred Stock, Shares Outstanding	0	0
Voting Common Stock [Member]
SHAREHOLDERS’ EQUITY
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	50,000,000	50,000,000
Common Stock, Shares, Issued	34,345,949	34,194,018
Common Stock, Shares, Outstanding	34,345,949	34,194,018
Nonvoting Common Stock [Member]
SHAREHOLDERS’ EQUITY
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	5,000,000	5,000,000
Common Stock, Shares, Issued	0	0
Common Stock, Shares, Outstanding	0	0
Loans [Member]
ASSETS
Loans Held-for-sale, Fair Value Disclosure	$ 51,697	$ 51,779