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Equity - Preferred Stock Conversion Terms (Details) | 12 Months Ended
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Dec. 31, 2020 $ / shares shares
5.75% cumulative convertible preferred stock |
Class of Stock [Line Items] |
Preferred stock, dividend rate | 5.75%
5.75% cumulative convertible preferred stock series A |
Class of Stock [Line Items] |
Preferred stock, dividend rate | 5.75%
4.50% cumulative convertible preferred stock |
Class of Stock [Line Items] |
Preferred stock, dividend rate | 4.50%
5.00% cumulative convertible preferred stock series 2005 B |
Class of Stock [Line Items] |
Preferred stock, dividend rate | 5.00%
Preferred stock | 5.75% cumulative convertible preferred stock |
Class of Stock [Line Items] |
Liquidation Preference per Share (in usd per share) | $ 1,000
Conversion Rate | 0.1984%
Conversion Price (in usd per share) | $ 5,039.59
Company's Market Conversion Trigger (in usd per share) | 6,551.46
Preferred stock | 5.75% cumulative convertible preferred stock series A |
Class of Stock [Line Items] |
Liquidation Preference per Share (in usd per share) | $ 1,000
Conversion Rate | 0.1918%
Conversion Price (in usd per share) | $ 5,215.02
Company's Market Conversion Trigger (in usd per share) | 6,779.52
Preferred stock | 4.50% cumulative convertible preferred stock |
Class of Stock [Line Items] |
Liquidation Preference per Share (in usd per share) | $ 100
Conversion Rate | 0.0123%
Conversion Price (in usd per share) | $ 8,142.99
Company's Market Conversion Trigger (in usd per share) | 10,585.89
Preferred stock | 5.00% cumulative convertible preferred stock series 2005 B |
Class of Stock [Line Items] |
Liquidation Preference per Share (in usd per share) | $ 100
Conversion Rate | 0.0139%
Conversion Price (in usd per share) | $ 7,208.51
Company's Market Conversion Trigger (in usd per share) | $ 9,371.06
Preferred stock | 4.50% or 5.00% (series 2005B) cumulative convertible preferred stock | Minimum |
Class of Stock [Line Items] |
Conversion of stock, market trigger (in shares) | shares | 250,000
Preferred stock | 5.75% or 5.75% (Series A) preferred stock | Minimum |
Class of Stock [Line Items] |
Conversion of stock, market trigger (in shares) | shares | 25,000

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- Definition Describe the conversion features of preferred stock if preferred stock is convertible. That is, shares of preferred stock into which another convertible security was converted, or shares of preferred stock into which another class of preferred stock was converted. + References No definition available. + Details
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- Definition The per share liquidation preference (or restrictions) of nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21475-112644 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21484-112644 + Details
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