Shareholders Equity - Common Stock Warrants (Details) $ / shares in Units, $ in Thousands		12 Months Ended
	Jun. 11, 2021 shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) D $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($)	Apr. 24, 2022 shares	May 27, 2021 shares	Jan. 31, 2017
Shareholders' Equity
Loss recognized from increase in liability | $				$ (95,876)
5.10% Notes due 2023
Shareholders' Equity
Interest rate (as a percent)		5.10%	5.10%	5.10%	5.10%
0.75% Exchangeable Notes due 2024
Shareholders' Equity
Interest rate (as a percent)		0.75%	0.75%	0.75%	0.75%			0.75%
5.75% Notes due 2025
Shareholders' Equity
Interest rate (as a percent)		5.75%	5.75%	5.75%	5.75%
7.25% Notes due 2026
Shareholders' Equity
Interest rate (as a percent)		7.25%	7.25%	7.25%
Common stock warrants
Shareholders' Equity
Number of warrants received per common share held							0.40
Number of warrants issued	3,200,000
Warrants outstanding		2,500,000	2,500,000	2,500,000
Number of business day notice period		20	20
Fair value of outstanding warrants | $		$ 80,900	$ 80,900	$ 80,900	$ 100
Loss recognized from increase in liability | $				$ (99,200)	$ 2,600
Common Stock
Shareholders' Equity
Aggregate number of shares issued from the exercise of warrants		1,100,000	1,100,000	1,100,000
Number of shares which may be purchased by each right		1	1	1
Exercise price (in dollars per share) | $ / shares		$ 166.66667	$ 166.66667	$ 166.66667
Number of additional securities which may be issued due to the incentive share component						0.3333
Multiplying factor for exercise of warrants						3
Percentage volume weighted average price of stock times factor must exceed sum of volume weighted average prices of second, third and fourth days before exercise						6.00%
Conversion price percentage		95.00%	95.00%	95.00%