CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
CONSOLIDATED STATEMENTS OF OTHER COMPREHENSIVE INCOME [Abstract]
Net income	$ 34,718	$ 48,565
Other comprehensive income
Derivative qualifying as a cash flow hedge, net of taxes (nil)	878	(703)
Employee pension plan adjustments, net of taxes (746)	2,047	(6)
Comprehensive income	$ 37,643	$ 47,856