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STOCK-BASED COMPENSATION - Restricted Stock - Additional Information (Detail) - Omnibus Plan [Member] - Restricted Stock [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted shares of restricted stock |  |  | 316,430 |
Stock-based compensation expense | $ 0.8 | $ 0.8 | $ 2.6 | $ 2.4
Unrecognized compensation cost related to unvested shares | $ 4.0 |  | $ 4.0 |
Period for cost recognition not yet recognized |  |  | 1 year 7 months 6 days |
Independent directors [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted shares of restricted stock |  |  | 26,361 | 53,634
Restricted stock vesting period |  |  | 1 year | 1 year
Management [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted shares of restricted stock |  |  | 290,069 | 851,673
Rtirement Eligible Shares |  |  | 19,271 | 47,194
Management [Member] | Restricted stock vesting after two-year anniversary of the grant date [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted stock vesting percentage |  |  | 50.00% | 50.00%
Management [Member] | Restricted stock vesting after three-year anniversary of the grant date [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted stock vesting percentage |  |  | 50.00% | 50.00%

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