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EMPLOYEE STOCK COMPENSATION - Additional Information (Details) - shares		12 Months Ended			48 Months Ended
	Aug. 21, 2012	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)					0
Stock option awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		3 years
Award expiration period		7 years
Stock option awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		5 years
Award expiration period		10 years
Restricted stock awards and restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		358,593	796,547	650,676
Vested (in shares)		331,998	273,904	415,994
Forfeited (in shares)		101,775	432,762	312,714
Restricted stock awards and restricted stock units | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		1 year
Restricted stock awards and restricted stock units | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period		5 years
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted (in shares)		78,771	174,935	306,801
Vested (in shares)		18,473	37,572	44,817
Forfeited (in shares)		24,242	233,999	86,936
Stock appreciation rights | Chief Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award expiration period	10 years
2018 Omnibus Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares available for awards (shares)		4,417,882			4,417,882
Common stock available for future awards (shares)		3,384,793			3,384,793

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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