Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical)

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Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical) - $ / shares
3 Months Ended
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Statement of Stockholders' Equity [Abstract]            
Preferred stock dividends (in dollars per share) $ 0.24 $ 1.25 $ 1.25 $ 1.25 $ 1.25 $ 1.25