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Stockholders' Equity (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 USD ($) shares
Stockholders' Equity Attributable to Parent [Abstract] |
Treasury Stock Purchase Plan | $ 40.0
Treasury Stock Purchase Plan Remaining Available | $ 7.2
Shares Paid for Tax Withholding for Share Based Compensation | shares | 23,101
Payments Related to Tax Withholding for Share-based Compensation | $ 5.3

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- Definition Treasury Stock Purchase Plan + References No definition available. + Details
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Period Type: | instant

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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 25 -Paragraph 19A -URI http://asc.fasb.org/extlink&oid=96949009&loc=SL79513924-113897 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3291-108585 + Details
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- Definition For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer. + 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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Balance Type: | credit
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- References No definition available. + Details
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