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Share Repurchase Program Share Repurchse Program (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Apr. 24, 2019
Stock Repurchase Program, Authorized Amount	$ 111,590
Shares Paid for Tax Withholding for Share Based Compensation	109,291
Stock Repurchased During Period, Shares	879,000	525,000
Stock Repurchased During Period, Value	$ 25,370
Stock Repurchase Program, Remaining Authorized Repurchase Amount			$ 200,000
Treasury Stock Acquired, Average Cost Per Share	$ 34.49
Payments Related to Tax Withholding for Share-based Compensation	$ 3,769
Common Stock [Member]
Stock Repurchased During Period, Shares	769,526
Treasury Stock Acquired, Average Cost Per Share	$ 32.97

X

- Definition

Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

+ References

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Number of shares used to settle grantee's tax withholding obligation for award under share-based payment arrangement.

+ References

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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