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Shareholders' Equity (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Nov. 13, 2014
Equity, Class of Treasury Stock [Line Items]
Cash dividends declared per share (in dollars per share)	$ 0.20	$ 0.19	$ 0.60	$ 0.57
Repurchase of shares (in shares)	0	113,656	1,057,115	113,656
Treasury Stock, Value, Acquired, Cost Method		$ 5,400,000	$ 32,100,000	$ 5,400,000
Remaining authorized repurchase capacity	$ 113,600,000		$ 113,600,000
Share repurchase program 2014
Equity, Class of Treasury Stock [Line Items]
Authorized amount to be repurchased					$ 500,000,000.0

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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