FAIR VALUE MEASUREMENTS (Tables)

3 Months Ended

Mar. 31, 2021

FAIR VALUE MEASUREMENTS [Abstract]

Fair Value Measurement on Recurring Basis

	Level 1 Fair Value
	March 31	December 31	March 31
in thousands	2021	2020	2020
Fair Value Recurring
Rabbi Trust
Mutual funds	$       28,565	$       28,058	$       19,001
Total	$       28,565	$       28,058	$       19,001

	Level 2 Fair Value
	March 31	December 31	March 31
in thousands	2021	2020	2020
Fair Value Recurring
Rabbi Trust
Money market mutual fund	$           347	$           837	$           520
Total	$           347	$           837	$           520