Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Director [Member]
Common stock issued for incentive compensation, shares (in shares)	391,000		391,000
Common stock dividends declared, per common share (in dollars per share)	$ 0.0025	$ 0.0025	$ 0.0075	$ 0.0075
Preferred stock dividends declared, per share (in dollars per share)	$ 0.875	$ 0.875	$ 2.625	$ 2.625
Common stock issued for 401(k) match, shares (in shares)	439,000	562,000	1,396,000	1,307,000
Common stock issued to pension plans, shares (in shares)	2,058,000		2,225,000	2,384,000
Common stock issued for incentive compensation, shares (in shares)			2,800,000	3,579,380
Restricted stock unit distributions, shares (in shares)		1,164,000	1,702,000	1,164,000
Teasury shares issued to charitable foundation, shares (in shares)			650,000
Stock Issued During Period, Shares, New Issues				253,000