CONSOLIDATED STATEMENTS OF FINANCIAL CONDITION (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Statement of Financial Position [Abstract]
Interest-bearing deposits in banks and other financial institutions, collateral	$ 2,330	$ 4,270
Amortized cost	4,374,333	4,504,342
Allowance for credit losses	7	8
Held-to-maturity securities, fair value	929,668	985,931
Allowance for credit losses	$ 198,253	$ 186,126
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)	76,208,354	76,095,094
Treasury stock, shares (in shares)	16,947,092	15,557,263