Shareholders' Equity (Preferred Stock) (Narrative) (Details) |
3 Months Ended | 9 Months Ended | ||||
|---|---|---|---|---|---|---|
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Jan. 03, 2018
USD ($)
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Sep. 30, 2019
USD ($)
$ / shares
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Sep. 30, 2018
USD ($)
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Sep. 30, 2019
USD ($)
item
$ / shares
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Sep. 30, 2018
USD ($)
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Dec. 31, 2018
USD ($)
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| Class of Stock [Line Items] | ||||||
| Shares Amount | $ 959,750,000 | $ 959,750,000 | $ 959,750,000 | |||
| Distributions to preferred shareholders | $ 13,000,000.0 | $ 13,000,000.0 | $ 38,877,000 | $ 39,614,000 | ||
| Number of quarterly dividends in arrearage before preferred shareholders can elect additional board members | item | 6 | |||||
| Number of additional board members the preferred shareholders can elect in the case of an excess arrearage of quarterly dividends | item | 2 | |||||
| Dividends in arrears | $ 0 | |||||
| Redeemable preferred stock, redemption price per share | $ / shares | $ 25.00 | $ 25.00 | ||||
| Series T Preferred Stock [Member] | ||||||
| Class of Stock [Line Items] | ||||||
| Cumulative preferred stock, dividend rate | 6.00% | |||||
| Shares Amount | $ 130,000,000.0 | |||||
| X | ||||||||||
- Definition Number of quarterly dividends in arrearage before preferred shareholders can elect additional board members No definition available.
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| X | ||||||||||
- Definition Number of Additional Members Right To Elect No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Amount of cash outflow in the form of ordinary dividends to preferred shareholders of the parent entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Aggregate amount of cumulative preferred dividends in arrears. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The percentage rate used to calculate dividend payments on preferred stock. No definition available.
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| X | ||||||||||
- Definition The price per share at which the preferred stock of an entity that has priority over common stock in the distribution of dividends and in the event of liquidation of the entity is redeemed or may be called at. The redemption features of this preferred stock are solely within the control of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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