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Earnings Per Share - Stock Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended
--- | --- | --- | ---
Nov. 30, 2015 | Nov. 30, 2015 | Sep. 30, 2015
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares | 2,109 | 4,474 | 5,900
Avg. Price per Share (in dollars per share) | $ 85.53 | $ 85.59 | $ 84.07
Purchase Price | $ 180,390 | $ 382,918 | $ 500,000
January 13, 2015 |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares | 713 | 3,078 |
Avg. Price per Share (in dollars per share) | $ 84.74 | $ 85.44 |
Purchase Price | $ 60,409 | $ 262,937 |
August 4, 2015 |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |
Shares | 1,396 | 1,396 |
Avg. Price per Share (in dollars per share) | $ 85.94 | $ 85.94 |
Purchase Price | $ 119,981 | $ 119,981 |

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