CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Interest-bearing deposits in banks and other financial institutions, collateral	$ 5,010	$ 4,650
Amortized cost	4,584,190	4,834,550
Allowance for credit losses	8	10
Held-to-maturity securities, fair value	927,680	1,040,104
Allowance for credit losses	$ 175,988	$ 151,861
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	90,000,000	90,000,000
Common stock, issued (in shares)	76,043,902	75,921,997
Treasury stock, shares (in shares)	15,316,263	14,310,085