Consolidated Statement of Changes in Shareholders' Equity (Unaudited) (Parenthetical) - $ / shares shares in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Preferred Series A [Member]
Preferred stock per share dividend amount	$ 15.9375	$ 15.9375
Preferred Series C [Member]
Preferred stock per share dividend amount	15.9375	15.9375
Preferred Series E [Member]
Preferred stock per share dividend amount	16.125	16.125
Series F Preferred Stock [Member]
Preferred stock per share dividend amount	128.125	128.125
Retained Earnings [Member]
Common stock per share dividend amount	$ 1.00	$ 0.75
Series A Warrants [Member] \| Treasury Stock [Member]
Exercise of warrants into shares of common stock		36,974
Exercise of warrants into shares of common stock		22,553

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