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STOCK-BASED COMPENSATION - Restricted Stock - Additional Information (Detail) - Omnibus Plan [Member] - Restricted Stock [Member] - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted shares of restricted stock |  |  | 266,116 |
Share based compensation cost | $ 0.7 | $ 0.8 | $ 1.6 | $ 1.9
Stock based compensation expense unrecognized related to nonvested shares of restricted stock | $ 3.5 |  | $ 3.5 |
Period for cost recognition not yet recognized |  |  | 1 year 10 months 24 days |
Director [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted shares of restricted stock |  |  | 3,745 |
Restricted stock vesting period |  |  | 1 year |
Management [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Granted shares of restricted stock |  |  | 262,371 | 342,439
Retirement Eligible Shares |  |  | 13,308 | 20,447
Restricted stock vesting after two-year anniversary of the grant date [Member] | Management [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted stock vesting percentage |  |  | 50.00% | 50.00%
Restricted stock vesting after three-year anniversary of the grant date [Member] | Management [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Restricted stock vesting percentage |  |  | 50.00% | 50.00%

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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