FAIR VALUE MEASUREMENTS (Tables)

6 Months Ended

Jun. 30, 2019

FAIR VALUE MEASUREMENTS [Abstract]

Fair Value Measurement on Recurring Basis

	Level 1 Fair Value
	June 30	December 31	June 30
in thousands	2019	2018	2018
Fair Value Recurring
Rabbi Trust
Mutual funds	$       23,382	$       19,164	$       20,698
Total	$       23,382	$       19,164	$       20,698

	Level 2 Fair Value
	June 30	December 31	June 30
in thousands	2019	2018	2018
Fair Value Recurring
Rabbi Trust
Money market mutual fund	$           398	$        1,015	$        1,754
Total	$           398	$        1,015	$        1,754