Shareholders' Equity and Loss Per Common Share - Common Shares Repurchased (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	3 Months Ended		9 Months Ended		55 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024
Shareholders' Equity and Loss Per Common Share
Authorized value of shares for repurchase	$ 1,500,000		$ 1,500,000		$ 1,500,000
Repurchased shares, Value			$ 168,300
Repurchase and retired common shares	3.1	7.9	10.8	18.4	56.6
Repurchase and retired common shares, Value	$ 50,213	$ 120,839	$ 168,371	$ 276,684	$ 1,100
Average purchase price	$ 16.23	$ 15.24	$ 15.61	$ 14.98	$ 19.88