Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	Oct. 21, 2020	Apr. 21, 2020
Subsequent Event [Line Items]
Stock Repurchase Program, Authorized Amount		$ 200.0
Subsequent Event
Subsequent Event [Line Items]
Dividend approved and declared (in dollars per share)	$ 0.57
8.50% Series A Cumulative Redeemable Perpetual Preference Shares | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage	8.50%
Dividend approved and declared (in dollars per share)	$ 0.5312500
8.00% Series B Cumulative Redeemable Perpetual Preference Shares | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage	8.00%
Dividend approved and declared (in dollars per share)	$ 0.5000000
7.375% Series C Cumulative Redeemable Perpetual Preference Shares | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage	7.375%
Dividend approved and declared (in dollars per share)	$ 0.4609375
6.875% Series D Cumulative Redeemable Perpetual Preference Shares | Subsequent Event
Subsequent Event [Line Items]
Preferred stock, dividend rate, percentage	6.875%
Dividend approved and declared (in dollars per share)	$ 0.4296875