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Shareholders' Equity Share-Repurchase Programs (Details) $ in Thousands | Sep. 30, 2017 USD ($)
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Share-Repurchase Programs [Line Items] |
Stock Repurchase Program, Authorized Amount | $ 800,000
Stock Repurchase Program, Dollar Value of Shares Repurchased | 416,081
Stock Repurchase Program, Remaining Authorized Repurchase Amount | 383,919
Shares Approved September 2015 [Member] |
Share-Repurchase Programs [Line Items] |
Stock Repurchase Program, Authorized Amount | 400,000
Stock Repurchase Program, Dollar Value of Shares Repurchased | 400,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount | 0
Shares Approved December 2016 [Member] |
Share-Repurchase Programs [Line Items] |
Stock Repurchase Program, Authorized Amount | 400,000
Stock Repurchase Program, Dollar Value of Shares Repurchased | 16,081
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $ 383,919

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- Definition [Line Items] for Share-Repurchase Programs [Table] + References No definition available. + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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- Details
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