Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Stockholders' Equity [Abstract]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	53,425	101,284	196,948	255,184
Stock Redeemed or Called During Period, Shares			6,000,000
Treasury Stock, Shares, Acquired	400	202,724	182,225	704,382
Stock Issued During Period, Shares, Treasury Stock Reissued	58,900		97,843
Approximate cash dividends declared on preferred stock, per share		$ 0.34	$ 0.34	$ 1.01
Cash dividends declared on common stock, per share	$ 0.71	$ 0.71	$ 2.13	$ 2.09