v3.20.4

Long-Term Incentive Plan Units (Narrative) (Details) - USD ($) $ in Thousands |  |  |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 17, 2020 | Sep. 10, 2020 | Mar. 04, 2020 | Dec. 12, 2018 | Sep. 12, 2018 | Mar. 07, 2018 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based long term incentive plan unit expense |  |  |  |  |  |  | $ 722 | $ 475 | $ 415
Capital shares reserved for future issuance (in shares) |  |  |  |  |  |  | 1,761,212 | 1,832,309 | 1,874,223
Long-Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  |  |  |  |  |  | 3,638 | 13,092 | 3,334
Grants in Period (in shares) |  |  |  |  |  |  | 75,550 |  | 39,432
Director [Member] | Long-Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
LTIP Unit Grants in Period (in units) |  |  |  |  | 14,440 |  |  |  |
Grants in Period (in shares) |  |  |  |  |  |  | 22,840 |  | 14,440
Dedicated or partially dedicated personnel [Member] | Long-Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
LTIP Unit Grants in Period (in units) | 32,809 | 22,840 | 14,811 | 17,383 |  | 1,723 |  |  |
Manager [Member] | Long-Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period |  |  |  |  |  |  | 0 | 9,482 | 0
Vest December 11, 2019 [Member] | Dedicated or partially dedicated personnel [Member] | Long-Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Grants in Period (in shares) |  |  |  |  |  |  |  | 8,692 | 8,692
Vest December 12, 2019 [Member] | Dedicated or partially dedicated personnel [Member] | Long-Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Grants in Period (in shares) |  |  |  |  |  |  |  |  | 5,886
Vest December 11, 2020 [Member] | Dedicated or partially dedicated personnel [Member] | Long-Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Grants in Period (in shares) |  |  |  |  |  |  |  | 8,691 | 8,691
Vest December 13, 2021 [Member] | Dedicated or partially dedicated personnel [Member] | Long-Term Incentive Plan Units [Member] |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Grants in Period (in shares) |  |  |  |  |  |  | 10,067 |  |
Non-controlling interest in Operating Partnership [Member] | Non-controlling Interest |  |  |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |
Operating Partnership LTIP Units Redeemed (in units) |  |  |  |  |  |  |  |  | 503,988

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