Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Stockholders' Equity [Abstract]
Stock option exercise/stock unit conversions (115,430 shares YTD during 2022 and 513,824 shares YTD during 2021)	115,430	513,824
Purchase of treasury stock (7,459 shares during 2022 and 11,625 shares during 2021)	7,459	11,625
Treasury stock issued to the 401(k) stock purchase plan (18,555 shares YTD in 2021 )		18,555
Cash dividend - preferred stock (Approximately $11.13 per share YTD in 2022 and $14.34 per share YTD during 2021)	$ 11.13	$ 14.34
Cash dividend - Preferred Stock Dividends equivalent Per depositary Share Declared ($0.28 YTD during 2022 and $0.36 YTD during 2021)	0.28	0.36
Cash dividends - common stock ($0.75 per share YTD during 2022 and $0.72 per share YTD during 2021)	$ 0.75	$ 0.72