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Subsequent Events (Details) - Subsequent Event [Member] - USD ($) $ / shares in Units, $ in Millions | Feb. 12, 2020 | Jan. 24, 2020
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Subsequent Event [Line Items] |  |
Dividend approved and declared (in dollars per share) | $ 0.52 |
6.875% Series D Cumulative Redeemable Perpetual Preference Shares |  |
Subsequent Event [Line Items] |  |
Preferred stock, dividend rate, percentage | 6.875% |
Shares, issued (in shares) |  | 6,000,000
Proceeds from public offering |  | $ 150.0
Issuance costs |  | $ 5.2
Dividend approved and declared (in dollars per share) | $ 0.24349 |
8.50% Series A Cumulative Redeemable Perpetual Preference Shares |  |
Subsequent Event [Line Items] |  |
Preferred stock, dividend rate, percentage | 8.50% |
Dividend approved and declared (in dollars per share) | $ 0.53125 |
8.00% Series B Cumulative Redeemable Perpetual Preference Shares |  |
Subsequent Event [Line Items] |  |
Preferred stock, dividend rate, percentage | 8.00% |
Dividend approved and declared (in dollars per share) | $ 0.50 |
7.375% Series C Cumulative Redeemable Perpetual Preference Shares |  |
Subsequent Event [Line Items] |  |
Preferred stock, dividend rate, percentage | 7.375% |
Dividend approved and declared (in dollars per share) | $ 0.46094 |

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- Definition Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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- Definition The per share amount of a dividend declared, but not paid, as of the financial reporting date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586 + Details
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- Definition The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3255-108585 + Details
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- Definition Number of shares of stock issued as of the balance sheet date, including shares that had been issued and were previously outstanding but which are now held in the treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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