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Shareholders' Equity (Details) - $ / shares |  |  |  |  |  |  | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 26, 2017 | Oct. 27, 2016 | Jul. 28, 2016 | Apr. 27, 2016 | Jan. 28, 2016 | Apr. 02, 2013 | Dec. 31, 2014 | Dec. 31, 2016
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Preferred Stock Converted Into Common Stock, Shares |  |  |  |  |  |  |  | 102,363
Declared quarterly cash dividend |  | $ 0.20 | $ 0.20 | $ 0.19 | $ 0.18 |  |  |
Special Dividends Payable, Amount Per Share |  | $ 0.19 | $ 0.19 | $ 0.18 | $ 0.20 |  |  |
Subsequent Event [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Declared quarterly cash dividend | $ 0.22 |  |  |  |  |  |  |
Preferred Stock [Member] |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  |  |  | 8,782 | 0 |

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