SHARE-BASED COMPENSATION (Tables)

3 Months Ended

Mar. 31, 2021

Share-based Payment Arrangement [Abstract]

Summary of Transactions Involving Stock Units and Director Stock Grants

Transactions involving our stock units and director stock grants during the three months ended March 31, 2021 are summarized below:

	Three Months Ended March 31, 2021
	(unaudited)
	No. of Stock Units	Weighted Average Fair Value
	(in thousands)
Stock and stock units, beginning of period	854	$	12.55
Changes during the period:
Granted	—	$	—
Vested and settled	—	$	—
Forfeited and cancelled	(10)	$	12.78
Stock and stock units, end of period	844	$	12.54

Summary of Transactions Involving Performance Awards

Transactions involving our performance awards during the three months ended March 31, 2021 are summarized below:

	Three Months Ended March 31, 2021
	(unaudited)
	Performance Units Subject to Market Conditions			Performance Units Not Subject to Market Conditions
	No. of Stock Units1	Weighted Average Fair Value		No. of Stock Units1	Weighted Average Fair Value
	(in thousands)			(in thousands)
Performance stock units, beginning of period	553	$	13.69	273	$	12.55
Changes during the period:
Granted	110	$	14.96	110	$	11.69
Vested and settled	(28)	$	25.24	—	$	—
Forfeited and cancelled	(95)	$	23.14	(122)	$	17.49
Performance stock units, end of period	540	$	11.71	261	$	9.87

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1    Performance units with variable payouts are shown at target level of performance.