Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions		1 Months Ended		3 Months Ended	6 Months Ended	9 Months Ended		12 Months Ended
	Oct. 26, 2023	Oct. 27, 2023	Aug. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
Class of Stock [Line Items]
Shares repurchased in period (in shares)						14.7		27.8
Shares repurchased, weighted average price per share						$ 14.83		$ 13.89
Remaining authorized repurchase amount				$ 396,000		$ 396,000
Stock repurchase program, authorized amount through 2025				500,000		500,000
Repurchase of common stock						$ 216,693	$ 303,060
Quarterly cash dividend paid (per share)					$ 0.10
Cash dividends			$ 32,900		$ 58,800
Quarterly cash dividend declared (per share)			$ 0.115
9% Convertible Junior Subordinated Debentures
Class of Stock [Line Items]
Extinguishment of debt, amount				21,100
Reduction in shareholders' equity due to debt conversion				$ (5,300)
Subsequent Event
Class of Stock [Line Items]
Shares repurchased in period (in shares)		2.2
Repurchase of common stock		$ 36,500
Quarterly cash dividend declared (per share)	$ 0.115