Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Stockholders' Equity [Abstract]
Stock option exercise/stock unit conversions (114,252 shares QTD and 628,076 shares YTD during 2021 and 77,308 shares QTD and 143,523 shares YTD during 2020)	114,252	77,308	628,076	143,523
Redemption of series A preferred stock (6,000,000 shares)				6,000,000
Purchase of treasury stock (11,625 shares during 2021 and 181,825 shares during 2020)			11,625	181,825
Treasury stock issued to the 401(k) stock purchase plan (18,555 shares YTD in 2021 and 38,943 shares QTD and YTD in 2020)		38,943	18,555	38,943
Cash dividend - preferred stock (Approximately $11.13 per share QTD and $25.46 per share YTD during 2021 and $0.34 per share QTD and YTD during 2020)	$ 11.13		$ 25.46	$ 0.34
Cash dividend - Preferred Stock Dividends equivalent Per depositary Share Declared ($0.28 QTD and $0.64 YTD during 2021)	0.28		0.64
Cash dividends - common stock ($0.72 per share QTD and $1.44 per share YTD during 2021 and $0.71 per share QTD and $1.42 per share YTD during 2020)	$ 0.72	$ 0.71	$ 1.44	$ 1.42