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Earnings (Loss) Per Common Share and Stockholders' Equity (Share Repurchase Program and Treasury Stock) (Details) - USD ($) $ / shares in Units, $ in Thousands		1 Months Ended	3 Months Ended		6 Months Ended	8 Months Ended
	Feb. 25, 2021	Dec. 31, 2020	Jun. 30, 2021	Feb. 25, 2021	Jun. 30, 2021	Jun. 30, 2021	Nov. 30, 2020	Oct. 18, 2020
Equity, Class of Treasury Stock [Line Items]
Share repurchase program, authorized amount								$ 500,000
Treasury stock acquired, shares						9,100,000
Treasury stock acquired, value			$ 95,077		$ 98,075
Treasury stock acquired, average price per common share						$ 29.02
Treasury stock, shares		6,516,525	9,895,711		9,895,711	9,895,711
Treasury stock, carrying value		$ 151,600	$ 259,300		$ 259,300	$ 259,300
Open Market
Equity, Class of Treasury Stock [Line Items]
Treasury stock acquired, shares						5,000,000.0
Treasury stock acquired, value						$ 148,100
Accelerated Share Repurchase Agreement
Equity, Class of Treasury Stock [Line Items]
Treasury stock acquired, shares	500,000	3,500,000
Accelerated share repurchase agreement, aggregate amount							$ 115,000
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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Total cost of shares repurchased divided by the total number of shares repurchased.

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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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