FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2021

FAIR VALUE MEASUREMENTS [Abstract]

Fair Value Measurement on Recurring Basis

	Level 1 Fair Value
	June 30	December 31	June 30
in thousands	2021	2020	2020
Fair Value Recurring
Rabbi Trust
Mutual funds	$       31,190	$       28,058	$       21,994
Total	$       31,190	$       28,058	$       21,994

	Level 2 Fair Value
	June 30	December 31	June 30
in thousands	2021	2020	2020
Fair Value Recurring
Rabbi Trust
Money market mutual fund	$        1,249	$           837	$        1,738
Total	$        1,249	$           837	$        1,738