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Shareholders' Equity - Dividends (Details) - $ / shares | Nov. 02, 2016 | Jun. 15, 2016 | May 03, 2016 | Dec. 15, 2015 | Oct. 29, 2015 | Jun. 15, 2015 | Apr. 28, 2015
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Dividends [Abstract] |  |  |  |  |  |  |
Dividends declared (in dollars per share) |  |  | $ 0.86 |  | $ 0.80 |  | $ 0.80
Dividends paid (in dollars per share) |  | $ 0.86 |  | $ 0.80 |  | $ 0.80 |
Subsequent Event |  |  |  |  |  |  |
Dividends [Abstract] |  |  |  |  |  |  |
Dividends declared (in dollars per share) | $ 0.86 |  |  |  |  |  |

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