EARNINGS PER SHARE - Reconciliation (Details) - $ / shares shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Shares
Basic (in shares)	18,987	18,595	18,928	18,538
Effect of dilutive stock options (in shares)	595	870	658	843
Diluted (in shares)	19,582	19,465	19,586	19,381
Per Share Amount
Basic (in dollars per share)	$ 1.02	$ 0.98	$ 1.98	$ 1.42
Effect of dilutive stock options (in dollars per share)	(0.03)	(0.05)	(0.06)	(0.06)
Diluted (in dollars per share)	$ 0.99	$ 0.93	$ 1.92	$ 1.36