Share Transactions - Issuance of preferred shares (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	1 Months Ended		9 Months Ended
	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Class of Stock [Line Items]
Proceeds from issuance of preferred shares, net			$ 0	$ 485,821
Series G Preferred Shares
Class of Stock [Line Items]
Preferred shares issued		$ 500,000
Preferred shares, dividend rate (as a percent)		4.55%
Preferred shares, par value per share	$ 0.01			$ 0.01
Liquidation preference per share	25,000			25,000
Preferred shares, redemption price per share	25,000			25,000
Proceeds from issuance of preferred shares, net		$ 485,800
Series G Depositary Share Equivalent
Class of Stock [Line Items]
Preferred shares issued		$ 500,000
Preference shares, number of shares issued		20.0
Liquidation preference per share	25			25
Preferred shares, redemption price per share	$ 25			$ 25
Proportionate interest of preference shares (per depositary share)	0.10%			0.10%
Series E Preferred Shares
Class of Stock [Line Items]
Preferred shares, dividend rate (as a percent)	5.25%
Series E Depositary Share Equivalent
Class of Stock [Line Items]
Preferred shares, redemption price per share	$ 25			$ 25