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Shareholders Equity - Shareholder Rights Plan (Details) - $ / shares | Mar. 31, 2020 | Dec. 31, 2020 | Jun. 27, 2020 | Dec. 31, 2019
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Equity [Abstract] |  |  |  |
Shareholder rights plan, ownership trigger threshold | 15.00% |  |  |
Right dividend declared, per share of common stock held | 1 |  |  |
Common stock, par value (in dollars per share) | $ 1.00 | $ 1 | $ 1.00 | $ 1
Number of shares called by each warrant (in shares) |  | 0.5 |  |
Right, common stock purchase price (in dollars per share) | 22.50 |  |  |
Right, common stock purchase price, full right equivalent (in dollars per share) | $ 45.00 |  |  |

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- Definition Common Stock, Dividends, Class Of Warrant Or Right + References No definition available. + Details
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- Definition Shareholder Rights Plan, Ownership Trigger Threshold + References No definition available. + Details
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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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 + Details
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- Definition Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares. + References No definition available. + Details
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- Definition Face amount or stated value per share of common stock. + References Reference 1: 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(29)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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