Consolidated Statements of Condition (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Statement Of Financial Position [Abstract]
Held-to-Maturity: Fair Value	$ 4,601,876	$ 4,615,393
Preferred Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred Stock, authorized (in shares)	180,000	180,000
Preferred Stock, issued (in shares)	180,000	180,000
Preferred Stock, outstanding (in shares)	180,000	180,000
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, authorized (in shares)	500,000,000	500,000,000
Common Stock, issued (in shares)	58,722,929	58,733,625
Common Stock, outstanding (in shares)	39,646,506	39,835,750
Treasury Stock (in shares)	19,076,423	18,897,875