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Share Repurchases | 9 Months Ended
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Sep. 30, 2018
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Share Repurchases | Share Repurchases On May 25, 2017, our Board of Directors authorized a share repurchase program, which allows us to purchase up to $200.0 million of our common stock through open market repurchases, negotiated transactions, or other means, in accordance with applicable securities laws and other restrictions. This program is funded with cash on hand and cash flows from operating activities. The program does not have an expiration date and may be suspended at any time at the discretion of the Company. During the three months ended September 30, 2018, we repurchased 0.3 million shares of our common stock under the share repurchase program for an aggregate cost of $25.0 million and an average price per share of $72.62. During the nine months ended September 30, 2018, we repurchased 1.8 million shares of our common stock under the share repurchase program for an aggregate cost of $125.0 million and an average price per share of $70.13.

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- Definition The entire disclosure for treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -URI http://asc.fasb.org/subtopic&trid=2208821 + Details
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