Intrinsic value of equity-based compensation awards granted. Excludes stock and unit options.

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Aggregate grant date fair value of equity-based compensation awards granted during period. Excludes stock and unit options.

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Term of award in which the equity-based award remains in effect, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Percentage Of Restricted Stock Units Awarded

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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.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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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).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Price of a single share of a number of saleable stocks of a company.

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Percentage of vesting of share-based compensation awards.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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SHARE BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands											1 Months Ended	8 Months Ended	12 Months Ended
	Nov. 25, 2019	Aug. 29, 2019	Aug. 10, 2019	Jun. 15, 2019	Jun. 13, 2019	May 17, 2019	Mar. 08, 2019	Aug. 10, 2018	Jul. 20, 2018	Sep. 15, 2015	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Apr. 30, 2018	Apr. 30, 2017	Apr. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense												$ 845	$ 1,905	$ 1,587	$ 6
2015 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares (in shares)										425,000
Term of award										10 years
2015 Incentive Plan \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Eligible to be earned (in shares)											25,562		25,562
Percent of RSUs granted											200.00%		200.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Volatility rate (in hundredths)											25.50%
Risk free interest rate											2.43%
Expected life											2 years 9 months 25 days
Share price (in dollars per share)							$ 58.06
2015 Incentive Plan \| Award granted May 17, 2019 \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)						812
2015 Incentive Plan \| Award granted June 13, 2019 \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)					7,521
2015 Incentive Plan \| Award granted March 8, 2019 \| Relative Total Shareholder Return Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)							12,781
2015 Incentive Plan \| Award granted 29 August 2019 \| Relative Total Shareholder Return Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)								197
2015 Incentive Plan \| 2018 LTIP Awards \| Restricted Stock \| Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares vesting percentage								33.33%	33.33%
2015 Incentive Plan \| 2018 LTIP Awards \| Restricted Stock \| Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares vesting percentage								33.33%	33.33%
2015 Incentive Plan \| 2018 LTIP Awards \| Restricted Stock \| Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares vesting percentage								33.33%	33.33%
2015 Incentive Plan \| 2018 LTIP Awards \| Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period												3 years
Trustee Awards \| Unrestricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation expense												$ 348	$ 505	$ 389	$ 365
Restricted Share Awards \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)												0	0	9,136	25,326
Eligible to be earned (in shares)											2,192	7,191	2,192	9,900	19,511	0
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Awards vested during period												$ 147	$ 310	$ 1,100	$ 127
Restricted Share Awards \| 2018 LTIP Awards \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period												3 years
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Awards vested during period											$ 961
Total compensation cost related to non-vested share awards											$ 547		547
Weighted average period to recognize cost											1 year 3 months 18 days
Restricted Share Awards \| 2018 LTIP Awards \| Restricted Stock \| Share-based Payment Arrangement, Employee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)											7,702
Restricted Share Awards \| 2018 LTIP Awards \| Restricted Stock \| Share-based Payment Arrangement, Nonemployee
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)											8,382
Long Term Incentive Plan \| 2018 LTIP Awards
Share based awards with market conditions, grant date fair value [Abstract]
Grant date fair value											$ 1,000
Share based awards with market conditions, unamortized value [Abstract]
Unamortized value											$ 1,300	$ 1,100	$ 1,300	$ 448
Director \| 2015 Incentive Plan \| Award granted November 25, 2019 \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)	49
Management \| 2015 Incentive Plan \| Award granted March 8, 2019 \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)							6,391
Management \| 2015 Incentive Plan \| Award granted June 15, 2019 \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)				169
Management \| 2015 Incentive Plan \| Award granted August 10, 2019 \| Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)			100
Management \| 2015 Incentive Plan \| Award granted 29 August 2019 \| Restricted Stock \| Share-Based Payment Arrangement, March Vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		98
Management \| 2015 Incentive Plan \| Award granted 29 August 2019 \| Restricted Stock \| Share-Based Payment Arrangement, August Vesting
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)								444