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Share Incentive Plans - Summary of Terms of Awards Generally Granted to Employees (Details) | 12 Months Ended
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Dec. 31, 2019
Options [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Overview | Options exercised after vesting result in issuance of new Common Shares.
Grant/Exercise Price | Granted at the fair market value of Common Shares as of the grant date.
Vesting Period | 3 years
Expiration | 10 years
Upon Employee Termination | Unvested options are canceled.
Restricted Shares [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Overview | Restricted shareholders generally have the same voting rights and receive quarterly dividend payments on their shares at the same rate and on the same date as any other Common Share holder (1).
Grant/Exercise Price | Granted at the fair market value of Common Shares as of the grant date.
Vesting Period | 3 years
Upon Employee Termination | Unvested restricted shares are canceled.
Restricted Stock Units (RSUs) [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Overview | When certain conditions are met, restricted units convert into an equal number of OP Units, which the holder may exchange for Common Shares on a one-for-one basis or at the option of the Company the cash value of such shares. Restricted unitholders receive quarterly distribution payments on their restricted units at the same rate and on the same date as any other OP Unit holder (1).
Grant/Exercise Price | Granted at varying discount rates to the fair market value of Common Shares as of the grant date (2).
Vesting Period | 3 years
Expiration | 10 years
Upon Employee Termination | Unvested restricted units are canceled.

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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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