EARNINGS PER SHARE - Reconciliation (Details) - $ / shares shares in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Shares
Basic (in shares)	18,868	18,481
Effect of dilutive stock options (in shares)	724	802
Diluted (in shares)	19,592	19,283
Per Share Amount
Basic (in dollars per share)	$ 0.96	$ 0.44
Effect of dilutive stock options (in dollars per share)	(0.04)	(0.02)
Diluted (in dollars per share)	$ 0.92	$ 0.42