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Share Repurchase Program Share Repurchse Program (Details) - USD ($)	3 Months Ended			9 Months Ended
	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Apr. 24, 2019
Stock Repurchase Program, Authorized Amount	$ 141,759,000			$ 141,759,000
Shares Paid for Tax Withholding for Share Based Compensation				100,525
Stock Repurchased During Period, Shares	785,000		416,000	2,369,000	1,556,000
Stock Repurchased During Period, Value				$ 73,202
Stock Repurchase Program, Remaining Authorized Repurchase Amount						$ 200,000,000
Treasury Stock Acquired, Average Cost Per Share				$ 32.86
Payments Related to Tax Withholding for Share-based Compensation				$ 3,303
Common Stock [Member]
Stock Repurchased During Period, Shares				2,268,419
Treasury Stock Acquired, Average Cost Per Share				$ 32.27
Trade Names [Member]
Amortization		$ 1,132,000

X

- Definition

The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

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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.

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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.

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No definition available.

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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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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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