INCENTIVE STOCK PLANS - Summary of Restricted Shares (Details) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
May 08, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)		100,452	24,592	87,924
Weighted average price of restricted shares granted (in dollars per share)		$ 23.15	$ 30.90	$ 35.44
Intrinsic value of restricted stock outstanding		$ 4,666	$ 5,540	$ 8,792
Grant date fair value of restricted stock vested		2,755	5,339	1,582
Cash used to purchase common shares from current and former employees to pay withholding tax requirements on restricted shares vested		$ 566	$ 1,610	$ 334
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)		171,409	103,634	0
Weighted average price of restricted shares granted (in dollars per share)		$ 22.58	$ 31.51	$ 0
Intrinsic value of restricted stock outstanding		$ 7,801	$ 3,351	$ 0
Grant date fair value of restricted stock vested		218	2	0
Cash used to purchase common shares from current and former employees to pay withholding tax requirements on restricted shares vested		$ 47	$ 1	$ 0
Replacement Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares granted (in shares)	69,176	69,176

Amount of cash outflow to satisfy grantee's tax withholding obligation for award under share-based payment arrangement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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The weighted average fair value at grant date for nonvested equity-based awards issued 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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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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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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