Consolidated Statements of Condition (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Statement Of Financial Position [Abstract]
Securities Available-for-sale, pledged	$ 1,168,000	$ 1,278,000
Preferred stock, par	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, Series A shares issued	515,000	515,000
Preferred stock, Series A shares outstanding	515,000	515,000
Common stock, par	$ 0.01	$ 0.01
Common stock, shares authorized	900,000,000	900,000,000
Common stock, shares issued	490,439,070	490,439,070
Common stock, shares outstanding	465,015,643	463,901,808
Treasury stock, shares	25,423,427	26,537,262
Net unrealized gain (loss) on securities available for sale, tax	$ 17	$ (25)
Net unrealized loss on pension and post-retirement obligations, tax	12	22
Cash flow hedges tax component	$ 3	$ 13