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STOCK BASED AND DEFERRED COMPENSATION - Summary of Compensation Expense and Stock Award Activity (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Summary of compensation expense and stock award activity |  |  |  |  |
Stock-based compensation expense (in dollars) |  | $ 6,156 | $ 6,852 | $ 16,557 | $ 16,897
Restricted Stock [Member] |  |  |  |  |
Summary of compensation expense and stock award activity |  |  |  |  |
Restricted stock awards vested (includes performance-based awards) (in shares) |  | 4,355 | 4,418 | 291,526 | 396,578
Non-vested shares [Member] |  |  |  |  |
Summary of compensation expense and stock award activity |  |  |  |  |
Non-vested shares granted (in shares) |  | 4,151 | 13,478 | 184,563 | 278,340
Performance-based non-vested shares [Member] |  |  |  |  |
Summary of compensation expense and stock award activity |  |  |  |  |
Non-vested shares granted (in shares) |  | 0 | 3,322 | 42,964 | 43,326
Shares issued as a result of performance achievement exceeding performance targets (in shares) | [1] | 0 | 0 | 26,167 | 37,146
[1] | Performance-based shares that vested and were issued as a result of performance achievement exceeding the originally established targeted number of shares related to respective performance metrics.

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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 -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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