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Earnings Per Common Share and Stockholders' Equity (Share Repurchase Program and Treasury Stock) (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	2 Months Ended	3 Months Ended	12 Months Ended
	Feb. 25, 2021	Dec. 31, 2020	Dec. 31, 2020	Feb. 25, 2021	Dec. 31, 2020	Nov. 30, 2020	Oct. 18, 2020	Dec. 31, 2019
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount							$ 500,000
Treasury stock acquired, value					$ 165,094
Treasury stock, shares		6,516,525	6,516,525		6,516,525			1,344,193
Treasury stock, carrying value		$ 151,600	$ 151,600		$ 151,600			$ 11,900
Open Market
Equity, Class of Treasury Stock [Line Items]
Treasury stock acquired, shares			1,900,000
Treasury stock acquired, value			$ 50,000
Accelerated Share Repurchase Agreement
Equity, Class of Treasury Stock [Line Items]
Treasury stock acquired, shares		3,500,000
Accelerated share repurchase agreement, aggregate amount						$ 115,000
Accelerated Share Repurchase Agreement | Subsequent Event
Equity, Class of Treasury Stock [Line Items]
Treasury stock acquired, shares	500,000
Accelerated share repurchases, price paid per share				$ 28.45

X

- Definition

Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time.

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Amount of cash receipt from (payment to) bank; or stock received from (issuance to) bank in the settlement of the accelerated share repurchase agreement.

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Amount of stock repurchase plan authorized.

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Cost basis for treasury stock acquired for purposes other than retirement.

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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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