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Consolidated Condensed Statements of Equity (Parenthetical) - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2017 | Sep. 30, 2016
Equity, Class of Treasury Stock [Line Items] |  |  |
Preferred stock - cash dividends declared per share (in dollars per share) |  | $ 4,650 | $ 4,650
Common stock - cash dividends declared per share (in dollars per share) |  | $ 0.27 | $ 0.21
Common stock repurchased under share repurchase program | [1] | $ 5,285 | $ 96,801
Stock Repurchase Authorization |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Common stock repurchased under share repurchase program |  |  | $ 93,500
[1] | 2016 includes $93.5 million repurchased under share repurchase programs.

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