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Share-based Compensation - Summary of Activity in Options (Details) - 2015 Management Incentive Plan - $ / shares | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | Dec. 31, 2022
Number of Options |  |  |  |
Outstanding at beginning of period (in shares) | 1,511,776 | 1,521,776 | 1,521,776 |
Granted (in shares) | 0 | 0 |  |
Exercised (in shares) | 0 | 0 |  |
Forfeited or expired (in shares) | 0 | 0 |  |
Outstanding at end of period (in shares) | 1,511,776 | 1,521,776 | 1,511,776 | 1,521,776
Weighted Average Exercise Price Per Share |  |  |  |
Outstanding at beginning of period (in dollars per share) | $ 19.00 | $ 19.00 | $ 19.00 |
Granted (in dollars per share) | 0 | 0 |  |
Exercised (in dollars per share) | 0 | 0 |  |
Forfeited or expired (in dollars per share) | 0 | 0 |  |
Outstanding at end of period (in dollars per share) | $ 19.00 | $ 19.00 | $ 19.00 | $ 19.00
Weighted Average Remaining Contractual Life |  |  |  |
Weighted Average Remaining Contractual Life | 1 year | 1 year 11 months 26 days | 1 year 2 months 26 days | 2 years 2 months 26 days
Number of Options |  |  |  |
Beginning balance, options exercisable, number of options (in shares) | 1,511,776 | 1,521,776 | 1,521,776 |
Options granted, number of options (in shares) | 0 | 0 |  |
Options exercised, number of options exercised (in shares) | 0 | 0 |  |
Options exercisable, number of options forfeited or expired (in shares) | 0 | 0 |  |
Ending balance, options exercisable, number of options (in shares) | 1,511,776 | 1,521,776 | 1,511,776 | 1,521,776
Options exercisable, weighted average exercise price (in dollars per share) | $ 19.00 | $ 19.00 | $ 19.00 | $ 19.00

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average price of options that were either forfeited or expired. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Gross number of share options (or share units) granted during the period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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