EARNINGS PER SHARE - Earnings Per Share Computations (Details) - $ / shares	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Number of antidilutive shares	0	0	0	0
Weighted average shares outstanding for basic earnings per common share	25,473,497	25,412,014	25,465,621	25,517,499
Dilutive effect of stock based awards and warrants	128,566	57,666	131,222	77,460
Weighted average shares outstanding for diluted earnings per common share	25,602,063	25,469,680	25,596,843	25,594,959
Basic earnings per common share (in dollars per share)	$ 0.96	$ 0.77	$ 1.86	$ 1.45
Diluted earnings per common share (in dollars per share)	$ 0.95	$ 0.77	$ 1.85	$ 1.44