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Net Income Per Share (Narrative) (Details) - USD ($) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Preferred Stock, Liquidation Preference Per Share | $ 1,000 |  |  |  | $ 1,000 |
Payments for Repurchase of Preferred Stock and Preference Stock |  |  |  |  | $ 61,600,000 | $ 0
Preferred Stock Dividends and Other Adjustments | $ 41,900,000 | $ 0 | $ 0 | $ 0 | 41,900,000 | $ 0
Series B Preferred Stock [Member] |  |  |  |  |  |
Payments for Repurchase of Preferred Stock and Preference Stock |  |  |  |  | $ 60,000,000 |
Preferred Series B [Member] |  |  |  |  |  |
Stock Repurchased and Retired During Period, Shares |  |  |  |  | 62,854 |
Stock Repurchase Price per Share |  |  |  |  | $ 954.59 |
Preferred Stock, Liquidation Amount per Share | 1,272.78 |  |  |  | 1,272.78 |
Preferred Stock, Carrying Value per Share | $ 43.80 |  |  |  | $ 43.80 |
Preferred Stock, Liquidation Preference Per Share | $ 1,000.00 |  |  |  | $ 1,000.00 |
Payments for Repurchase of Preferred Stock and Preference Stock |  |  |  |  | $ 60,000,000 |
Preferred Stock Dividends and Other Adjustments |  |  |  |  | $ 41,900,000 |

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- Definition Amount of preferred stock dividends and adjustments classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=117326831&loc=d3e1377-109256 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 7 -Subparagraph (SAB Topic 5.Q) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187283-122770 + 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://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 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 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=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(d)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: 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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