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Share Repurchases (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Feb. 19, 2020	Dec. 31, 2019	Feb. 25, 2014
Equity [Abstract]
Stock repurchase program, authorized amount		$ 350,000,000		$ 350,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 225,000,000		$ 160,000,000
Stock repurchase program, increase in authorized amount		$ 190,000,000
Percentage of employee's earnings withheld	10.00%

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- Definition

Employee Stock Purchase Plan, Percent Of Earnings

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- Definition

Stock Repurchase Program, Increase In Authorized Amount

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- Definition

Amount of stock repurchase plan authorized.

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- Definition

Amount remaining of a stock repurchase plan authorized.

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