CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
ASSETS
Debt Securities, Available-for-sale, Amortized Cost	$ 3,315,213	$ 3,653,160
Allowance for Credit Losses	(420)	433
Securities—held-to-maturity, fair value	$ 968,540	$ 541,853
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	34,372,784	34,252,632
Common Stock, Shares, Outstanding	34,372,784	34,252,632
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	$ 61,759	$ 39,775
Loans [Member] | Recurring [Member]
ASSETS
Loans Held-for-sale, Fair Value Disclosure	$ 16,890	$ 39,775