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EMPLOYEE STOCK COMPENSATION - Nonvested Restricted Stock Awards and Restricted Stock Units (Details) - $ / shares	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Restricted stock awards and units
Number of Shares
Outstanding at beginning of period (in shares)	697,088	848,302
Granted (in shares)	14,312	283,642
Vested (in shares)	(11,809)	(367,089)
Forfeited (in shares)	(38,724)	(103,988)
Outstanding at end of period (in shares)	660,867	660,867
Weighted Average Grant Date Fair Value Per Share
Outstanding at beginning of period (in dollars per share)	$ 17.13	$ 14.42
Granted (in dollars per share)	17.47	19.87
Vested (in dollars per share)	15.14	13.75
Forfeited (in dollars per share)	17.31	14.24
Outstanding at end of period (in dollars per share)	$ 17.16	$ 17.16
Performance Shares
Number of Shares
Granted (in shares)	0	66,472
Vested (in shares)	0	(77,327)
Forfeited (in shares)	(8,643)	(48,803)

X

- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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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 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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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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