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Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2017 | Dec. 31, 2016
Equity, Class of Treasury Stock [Line Items] |  |
Stock Repurchase Program Remaining Authorized Repurchase Amount1 | $ 7.7 |
Stock repurchase program remaining number of shares authorized to be repurchased | 655,157 |
SharePrice | $ 11.8 |
legal surplus | $ 77.8 | $ 76.3
Preferred Stock [Member] |  |
Equity, Class of Treasury Stock [Line Items] |  |
Preferred Stock Issue Costs | 13.6 | 13.6
Common Stock [Member] |  |
Equity, Class of Treasury Stock [Line Items] |  |
Common Stock Issuance Cost | $ 10.1 | $ 10.1

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