Shareholders' Equity and Earnings (Loss) Per Common Share - Common Shares Repurchased (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended	12 Months Ended			22 Months Ended
	Apr. 30, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2021	Mar. 31, 2020
Sale of stock
Authorized value of shares for repurchase						$ 500,000
Repurchase and retired common shares		5.4	3.8		9.1
Repurchase and retired common shares, Value		$ 157,700	$ 104,800		$ 262,400
Average purchase price		$ 29.34	$ 27.72		$ 28.67
Shares issued	11.5
Public offering per share	$ 42.00
Proceeds from common stock	$ 472,800			$ 472,780
Over-Allotment Option
Sale of stock
Shares issued	1.5