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Share and Unit-based Plans - Directors' Phantom Stock Plan (Details) | 12 Months Ended
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Dec. 31, 2022 $ / shares shares | Dec. 31, 2021 $ / shares shares | Dec. 31, 2020 $ / shares shares
Phantom stock units |  |  |
Share and unit-based plans |  |  |
Number of common shares into which units can be converted (in shares) | 1 |  |
Units |  |  |
Balance at beginning of year (in shares) | 0 | 4,662 | 7,216
Granted (in shares) | 61,420 | 17,554 | 24,576
Vested (in shares) | (27,381) | (22,216) | (27,130)
Balance at end of year (in shares) | 34,039 | 0 | 4,662
Weighted Average Grant Date Fair Value |  |  |
Balance at beginning of year (in dollars per share) | $ / shares | $ 0 | $ 35.35 | $ 43.29
Granted (in dollars per share) | $ / shares | 14.35 | 12.09 | 17.11
Vested (in dollars per share) | $ / shares | 14.55 | 16.97 | 20.94
Balance at end of year (in dollars per share) | $ / shares | $ 14.19 | $ 0 | $ 35.35
Director's Phantom Stock Plan |  |  |
Share and unit-based plans |  |  |
Deferral period for grant of units (in years) | 3 years |  |
Number of common shares into which units can be converted (in shares) | 1 |  |
Maximum shares authorized under plan (in shares) | 500,000 |  |
Shares available for issuance under plan (in shares) | 31,088 |  |

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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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