Share Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Thousands |
12 Months Ended | ||||
|---|---|---|---|---|---|
Dec. 31, 2017 |
Feb. 28, 2017 |
Dec. 31, 2016 |
Jul. 05, 2017 |
Feb. 24, 2017 |
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| Number of shares repurchased (in shares) | 2,365,836 | 673,626 | |||
| Share repurchase cost | $ 139,286 | $ 22,296 | |||
| 2016 Repurchase program | |||||
| Number of shares repurchased (in shares) | 788,399 | ||||
| Share repurchase cost | $ 26,600 | ||||
| Average price per share (in dollars per share) | $ 33.72 | ||||
| 2017 Repurchase program | |||||
| Share repurchase program, authorized amount | $ 200,000 | ||||
| 2017 ASR Agreement | |||||
| Payment under ASR agreement | $ 100,000 | ||||
| Initial number of shares delivered under ASR agreement (in shares) | 1,500,000 | ||||
| Initial percentage of shares delivered under ASR agreement | 80.00% | ||||
| X | ||||||||||
- Definition Initial percentage of shares delivered under the accelerated share repurchase agreement. No definition available.
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- Definition Initial number of shares delivered under the accelerated share repurchase agreement. No definition available.
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- Definition Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of stock repurchase plan authorized. No definition available.
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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Number of shares that have been repurchased during the period and are being held in treasury. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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