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Income Taxes (Notes) | 3 Months Ended
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Mar. 31, 2019
Income Tax Policy [Abstract] |
Stockholders' Equity Note Disclosure [Text Block] | Shareholders’ Equity On December 12, 2018, the Company entered into accelerated share repurchase agreement ("ASR") with an investment bank to purchase an aggregate $100.0 million of the Company’s common stock. As part of the ASR, the Company received an initial share delivery of 2,910,150 shares of the Company’s common stock with a fair market value of $80.0 million. Upon maturity of the program, the Company will receive the remaining balance of $20.0 million at settlement. Under the authorization from the Company’s Board of Directors, shares may be purchased from time to time, at the Company’s discretion and subject to the availability of stock, market conditions, the trading price of the stock, alternative uses for capital, the Company’s financial performance and other potential factors. These purchases may be carried out through open market purchases, block trades, accelerated share repurchase plans of up to $100.0 million each (unless otherwise approved by the Board of Directors), negotiated private transactions or pursuant to any trading plan that may be adopted in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934. At March 31, 2019, the remaining amount authorized by the Company's Board of Directors for shares repurchases was $147.5 million. On May 1, 2019, the Company's Board of Directors authorized the purchasing of up to an additional $372.5 million of the Company's outstanding common stock. With this authorization, the Company will now have outstanding approval to purchase up to approximately $500.0 million, in the aggregate, of the Company's outstanding common stock, after giving effect to the final settlement of shares in connection with the ASR entered into on December 12, 2018.

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- Definition Income Tax Policy [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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