CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Interest-bearing deposits in banks and other financial institutions, collateral	$ 5,940	$ 4,650
Amortized cost	4,679,774	4,834,550
Allowance for credit losses	8	10
Held-to-maturity securities, fair value	1,005,843	1,040,104
Allowance for credit losses	$ 171,869	$ 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)	76,021,963	75,921,997
Treasury stock, shares (in shares)	14,929,363	14,310,085